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From: Sergey Kaplun via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Sergey Bronnikov <sergeyb@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org
Subject: [Tarantool-patches] [PATCH v1 luajit 01/41] perf: add LuaJIT-test-cleanup perf suite
Date: Fri, 24 Oct 2025 13:50:05 +0300	[thread overview]
Message-ID: <e129362eca2d6848f2b8e50373915a29c14a1d6f.1761301736.git.skaplun@tarantool.org> (raw)
In-Reply-To: <cover.1761301736.git.skaplun@tarantool.org>

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This patch introduces the LuaJIT-test-cleanup bench suite [1] into our
LuaJIT fork source tree. To provide relatable reprodusible results
several benchmarks need to be adjusted. However, to be sure we initially use
the valid suite, everything in the <perf/LuaJIT-benches> directory is
moved intact.

[1]: https://github.com/LuaJIT/LuaJIT-test-cleanup/tree/014708b/bench
---
 .luacheckrc                                |    1 +
 perf/LuaJIT-benches/PARAM_arm.txt          |   29 +
 perf/LuaJIT-benches/PARAM_mips.txt         |   29 +
 perf/LuaJIT-benches/PARAM_ppc.txt          |   29 +
 perf/LuaJIT-benches/PARAM_x86.txt          |   29 +
 perf/LuaJIT-benches/SUMCOL_1.txt           | 1000 ++++++++++++++++++++
 perf/LuaJIT-benches/TEST_md5sum.txt        |   20 +
 perf/LuaJIT-benches/array3d.lua            |   59 ++
 perf/LuaJIT-benches/binary-trees.lua       |   47 +
 perf/LuaJIT-benches/chameneos.lua          |   68 ++
 perf/LuaJIT-benches/coroutine-ring.lua     |   42 +
 perf/LuaJIT-benches/euler14-bit.lua        |   22 +
 perf/LuaJIT-benches/fannkuch.lua           |   50 +
 perf/LuaJIT-benches/fasta.lua              |   95 ++
 perf/LuaJIT-benches/k-nucleotide.lua       |   58 ++
 perf/LuaJIT-benches/life.lua               |  111 +++
 perf/LuaJIT-benches/mandelbrot-bit.lua     |   33 +
 perf/LuaJIT-benches/mandelbrot.lua         |   23 +
 perf/LuaJIT-benches/md5.lua                |  183 ++++
 perf/LuaJIT-benches/meteor.lua             |  220 +++++
 perf/LuaJIT-benches/nbody.lua              |  119 +++
 perf/LuaJIT-benches/nsieve-bit-fp.lua      |   37 +
 perf/LuaJIT-benches/nsieve-bit.lua         |   27 +
 perf/LuaJIT-benches/nsieve.lua             |   21 +
 perf/LuaJIT-benches/partialsums.lua        |   29 +
 perf/LuaJIT-benches/pidigits-nogmp.lua     |  100 ++
 perf/LuaJIT-benches/ray.lua                |  135 +++
 perf/LuaJIT-benches/recursive-ack.lua      |    8 +
 perf/LuaJIT-benches/recursive-fib.lua      |    7 +
 perf/LuaJIT-benches/revcomp.lua            |   37 +
 perf/LuaJIT-benches/scimark-2010-12-20.lua |  400 ++++++++
 perf/LuaJIT-benches/scimark-fft.lua        |    1 +
 perf/LuaJIT-benches/scimark-lu.lua         |    1 +
 perf/LuaJIT-benches/scimark-sor.lua        |    1 +
 perf/LuaJIT-benches/scimark-sparse.lua     |    1 +
 perf/LuaJIT-benches/scimark_lib.lua        |  297 ++++++
 perf/LuaJIT-benches/series.lua             |   34 +
 perf/LuaJIT-benches/spectral-norm.lua      |   40 +
 perf/LuaJIT-benches/sum-file.lua           |    6 +
 39 files changed, 3449 insertions(+)
 create mode 100644 perf/LuaJIT-benches/PARAM_arm.txt
 create mode 100644 perf/LuaJIT-benches/PARAM_mips.txt
 create mode 100644 perf/LuaJIT-benches/PARAM_ppc.txt
 create mode 100644 perf/LuaJIT-benches/PARAM_x86.txt
 create mode 100644 perf/LuaJIT-benches/SUMCOL_1.txt
 create mode 100644 perf/LuaJIT-benches/TEST_md5sum.txt
 create mode 100644 perf/LuaJIT-benches/array3d.lua
 create mode 100644 perf/LuaJIT-benches/binary-trees.lua
 create mode 100644 perf/LuaJIT-benches/chameneos.lua
 create mode 100644 perf/LuaJIT-benches/coroutine-ring.lua
 create mode 100644 perf/LuaJIT-benches/euler14-bit.lua
 create mode 100644 perf/LuaJIT-benches/fannkuch.lua
 create mode 100644 perf/LuaJIT-benches/fasta.lua
 create mode 100644 perf/LuaJIT-benches/k-nucleotide.lua
 create mode 100644 perf/LuaJIT-benches/life.lua
 create mode 100644 perf/LuaJIT-benches/mandelbrot-bit.lua
 create mode 100644 perf/LuaJIT-benches/mandelbrot.lua
 create mode 100644 perf/LuaJIT-benches/md5.lua
 create mode 100644 perf/LuaJIT-benches/meteor.lua
 create mode 100644 perf/LuaJIT-benches/nbody.lua
 create mode 100644 perf/LuaJIT-benches/nsieve-bit-fp.lua
 create mode 100644 perf/LuaJIT-benches/nsieve-bit.lua
 create mode 100644 perf/LuaJIT-benches/nsieve.lua
 create mode 100644 perf/LuaJIT-benches/partialsums.lua
 create mode 100644 perf/LuaJIT-benches/pidigits-nogmp.lua
 create mode 100644 perf/LuaJIT-benches/ray.lua
 create mode 100644 perf/LuaJIT-benches/recursive-ack.lua
 create mode 100644 perf/LuaJIT-benches/recursive-fib.lua
 create mode 100644 perf/LuaJIT-benches/revcomp.lua
 create mode 100644 perf/LuaJIT-benches/scimark-2010-12-20.lua
 create mode 100644 perf/LuaJIT-benches/scimark-fft.lua
 create mode 100644 perf/LuaJIT-benches/scimark-lu.lua
 create mode 100644 perf/LuaJIT-benches/scimark-sor.lua
 create mode 100644 perf/LuaJIT-benches/scimark-sparse.lua
 create mode 100644 perf/LuaJIT-benches/scimark_lib.lua
 create mode 100644 perf/LuaJIT-benches/series.lua
 create mode 100644 perf/LuaJIT-benches/spectral-norm.lua
 create mode 100644 perf/LuaJIT-benches/sum-file.lua

diff --git a/.luacheckrc b/.luacheckrc
index 19098dd9..35824875 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -16,6 +16,7 @@ files['test/tarantool-tests/'] = {
 -- test suites and need to be coherent with the upstream.
 exclude_files = {
   'dynasm/',
+  'perf/LuaJIT-benches/',
   'src/',
   'test/LuaJIT-tests/',
   'test/PUC-Rio-Lua-5.1-tests/',
diff --git a/perf/LuaJIT-benches/PARAM_arm.txt b/perf/LuaJIT-benches/PARAM_arm.txt
new file mode 100644
index 00000000..a07fd010
--- /dev/null
+++ b/perf/LuaJIT-benches/PARAM_arm.txt
@@ -0,0 +1,29 @@
+array3d 200
+binary-trees 13
+chameneos 1e6
+coroutine-ring 3e6
+euler14-bit 5e6
+fannkuch 10
+fasta 2e6
+k-nucleotide 5e5 FASTA_500000
+life
+mandelbrot 2000
+mandelbrot-bit 2000
+md5 5000
+nbody 1e6
+nsieve 9
+nsieve-bit 9
+nsieve-bit-fp 9
+partialsums 2e6
+pidigits-nogmp 2000
+ray 4
+recursive-ack 9
+recursive-fib 37
+revcomp 1e6 FASTA_1000000
+scimark-fft 2000
+scimark-lu 300
+scimark-sor 5000
+scimark-sparse 5e3
+series 1500
+spectral-norm 1000
+sum-file 1000 SUMCOL_1000
diff --git a/perf/LuaJIT-benches/PARAM_mips.txt b/perf/LuaJIT-benches/PARAM_mips.txt
new file mode 100644
index 00000000..e6bcadba
--- /dev/null
+++ b/perf/LuaJIT-benches/PARAM_mips.txt
@@ -0,0 +1,29 @@
+array3d 50
+binary-trees 10
+chameneos 5e4
+coroutine-ring 2e5
+euler14-bit 2e4
+fannkuch 8
+fasta 2e4
+k-nucleotide 1e4 FASTA_10000
+life
+mandelbrot 150
+mandelbrot-bit 150
+md5 10
+nbody 1e4
+nsieve 4
+nsieve-bit 4
+nsieve-bit-fp 2
+partialsums 5e4
+pidigits-nogmp 150
+ray 2
+recursive-ack 7
+recursive-fib 29
+revcomp 5e4 FASTA_50000
+scimark-fft 20
+scimark-lu 3
+scimark-sor 40
+scimark-sparse 100
+series 50
+spectral-norm 100
+sum-file 100 SUMCOL_100
diff --git a/perf/LuaJIT-benches/PARAM_ppc.txt b/perf/LuaJIT-benches/PARAM_ppc.txt
new file mode 100644
index 00000000..c8319a15
--- /dev/null
+++ b/perf/LuaJIT-benches/PARAM_ppc.txt
@@ -0,0 +1,29 @@
+array3d 200
+binary-trees 13
+chameneos 1e6
+coroutine-ring 4e6
+euler14-bit 1e6
+fannkuch 9
+fasta 5e5
+k-nucleotide 1e5 FASTA_100000
+life
+mandelbrot 800
+mandelbrot-bit 800
+md5 500
+nbody 1e5
+nsieve 8
+nsieve-bit 8
+nsieve-bit-fp 8
+partialsums 5e5
+pidigits-nogmp 800
+ray 5
+recursive-ack 9
+recursive-fib 34
+revcomp 1e6 FASTA_1000000
+scimark-fft 500
+scimark-lu 100
+scimark-sor 1000
+scimark-sparse 3000
+series 1000
+spectral-norm 200
+sum-file 1000 SUMCOL_1000
diff --git a/perf/LuaJIT-benches/PARAM_x86.txt b/perf/LuaJIT-benches/PARAM_x86.txt
new file mode 100644
index 00000000..87088d7b
--- /dev/null
+++ b/perf/LuaJIT-benches/PARAM_x86.txt
@@ -0,0 +1,29 @@
+array3d 300
+binary-trees 16
+chameneos 1e7
+coroutine-ring 2e7
+euler14-bit 2e7
+fannkuch 11
+fasta 25e6
+k-nucleotide 5e6 FASTA_5000000
+life
+mandelbrot 5000
+mandelbrot-bit 5000
+md5 20000
+nbody 5e6
+nsieve 12
+nsieve-bit 12
+nsieve-bit-fp 12
+partialsums 1e7
+pidigits-nogmp 5000
+ray 9
+recursive-ack 10
+recursive-fib 40
+revcomp 5e6 FASTA_5000000
+scimark-fft 50000
+scimark-lu 5000
+scimark-sor 50000
+scimark-sparse 15e4
+series 10000
+spectral-norm 3000
+sum-file 5000 SUMCOL_5000
diff --git a/perf/LuaJIT-benches/SUMCOL_1.txt b/perf/LuaJIT-benches/SUMCOL_1.txt
new file mode 100644
index 00000000..956aba14
--- /dev/null
+++ b/perf/LuaJIT-benches/SUMCOL_1.txt
@@ -0,0 +1,1000 @@
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diff --git a/perf/LuaJIT-benches/TEST_md5sum.txt b/perf/LuaJIT-benches/TEST_md5sum.txt
new file mode 100644
index 00000000..15aa8a1c
--- /dev/null
+++ b/perf/LuaJIT-benches/TEST_md5sum.txt
@@ -0,0 +1,20 @@
+binarytrees	10	7202f4e13df7abc5ad8c07f05fe9d644
+chameneos	1e5	a629ce12f63050c6656bce175258cf8f
+cheapconcr	1000	d29799d1e263810a4db7bbf43ca66499
+cheapconcw	1000	d29799d1e263810a4db7bbf43ca66499
+fannkuch	8	51e5e372cbc5471ea8940b20ad782319
+fasta	1e5	78cd327de6f0a5667da0aa9349888279
+knucleotide	x	88efb24c1fed533959ed84bb32c88142 <FASTA_10000
+mandelbrot	200	cc65e64bd553ed18896de1dfe7fae3e5
+meteor	3000	9a65bb4b0a735ace1eaa4f2628f01026
+nbody	1e4	e0361c898ba747117ec177f7b3b3359c
+nsieve	4	767e02c93624995732e151932fa5f304
+nsievebits	4	767e02c93624995732e151932fa5f304
+partialsums	1e5	33efb41c72f8ecfb5b36c99e32189a3f
+pidigits	200	173a11a77bb1e72dd31254a760317428
+recursive	4	07a47c2d2cf50503b16efda789f84916
+regexdna	x	fdf3e6e9c599754e1eec3e524ea13fed <FASTA_10000
+revcomp	x	47de276e2f72519b57b82da39f4c7592 <FASTA_10000
+spectralnorm 200	25f44bd552ccd9faa0ee2ae5617947e2
+sumfile	x	2ebd3caa45b31a2e74e436b645eab4b0 <SUMCOL_100
+
diff --git a/perf/LuaJIT-benches/array3d.lua b/perf/LuaJIT-benches/array3d.lua
new file mode 100644
index 00000000..c10b09b1
--- /dev/null
+++ b/perf/LuaJIT-benches/array3d.lua
@@ -0,0 +1,59 @@
+
+local function array_set(self, x, y, z, p)
+  assert(x >= 0 and x < self.nx, "x outside PA")
+  assert(y >= 0 and y < self.ny, "y outside PA")
+  assert(z >= 0 and z < self.nz, "z outside PA")
+  local pos = (z*self.ny + y)*self.nx + x
+  local image = self.image
+  if self.packed then
+    local maxv = self.max_voltage
+    if p > maxv then self.max_voltage = p*2.0 end
+    local oldp = image[pos] or 0.0 -- Works with uninitialized table, too
+    if oldp > maxv then p = p + maxv*2.0 end
+    image[pos] = p
+  else
+    image[pos] = p
+  end
+  self.changed = true
+  self.changed_recently = true
+end
+
+local function array_points(self)
+  local y, z = 0, 0
+  return function(self, x)
+    x = x + 1
+    if x >= self.nx then
+      x = 0
+      y = y + 1
+      if y >= self.ny then
+	y = 0
+	z = z + 1
+	if z >= self.nz then
+	  return nil, nil, nil
+	end
+      end
+    end
+    return x, y, z
+  end, self, 0
+end
+
+local function array_new(nx, ny, nz, packed)
+  return {
+    nx = nx, ny = ny, nz = nz,
+    packed = packed, max_voltage = 0.0,
+    changed = false, changed_recently = false,
+    image = {}, -- Preferably use a fixed-type, pre-sized array here.
+    set = array_set,
+    points = array_points,
+  }
+end
+
+local dim = tonumber(arg and arg[1]) or 300 -- Array dimension dim^3
+local packed = arg and arg[2] == "packed"   -- Packed image or flat
+local arr = array_new(dim, dim, dim, packed)
+
+for x,y,z in arr:points() do
+  arr:set(x, y, z, x*x)
+end
+assert(arr.image[dim^3-1] == (dim-1)^2)
+
diff --git a/perf/LuaJIT-benches/binary-trees.lua b/perf/LuaJIT-benches/binary-trees.lua
new file mode 100644
index 00000000..bf040466
--- /dev/null
+++ b/perf/LuaJIT-benches/binary-trees.lua
@@ -0,0 +1,47 @@
+
+local function BottomUpTree(item, depth)
+  if depth > 0 then
+    local i = item + item
+    depth = depth - 1
+    local left, right = BottomUpTree(i-1, depth), BottomUpTree(i, depth)
+    return { item, left, right }
+  else
+    return { item }
+  end
+end
+
+local function ItemCheck(tree)
+  if tree[2] then
+    return tree[1] + ItemCheck(tree[2]) - ItemCheck(tree[3])
+  else
+    return tree[1]
+  end
+end
+
+local N = tonumber(arg and arg[1]) or 0
+local mindepth = 4
+local maxdepth = mindepth + 2
+if maxdepth < N then maxdepth = N end
+
+do
+  local stretchdepth = maxdepth + 1
+  local stretchtree = BottomUpTree(0, stretchdepth)
+  io.write(string.format("stretch tree of depth %d\t check: %d\n",
+    stretchdepth, ItemCheck(stretchtree)))
+end
+
+local longlivedtree = BottomUpTree(0, maxdepth)
+
+for depth=mindepth,maxdepth,2 do
+  local iterations = 2 ^ (maxdepth - depth + mindepth)
+  local check = 0
+  for i=1,iterations do
+    check = check + ItemCheck(BottomUpTree(1, depth)) +
+            ItemCheck(BottomUpTree(-1, depth))
+  end
+  io.write(string.format("%d\t trees of depth %d\t check: %d\n",
+    iterations*2, depth, check))
+end
+
+io.write(string.format("long lived tree of depth %d\t check: %d\n",
+  maxdepth, ItemCheck(longlivedtree)))
diff --git a/perf/LuaJIT-benches/chameneos.lua b/perf/LuaJIT-benches/chameneos.lua
new file mode 100644
index 00000000..78b64c3f
--- /dev/null
+++ b/perf/LuaJIT-benches/chameneos.lua
@@ -0,0 +1,68 @@
+
+local co = coroutine
+local create, resume, yield = co.create, co.resume, co.yield
+
+local N = tonumber(arg and arg[1]) or 10
+local first, second
+
+-- Meet another creature.
+local function meet(me)
+  while second do yield() end -- Wait until meeting place clears.
+  local other = first
+  if other then -- Hey, I found a new friend!
+    first = nil
+    second = me
+  else -- Sniff, nobody here (yet).
+    local n = N - 1
+    if n < 0 then return end -- Uh oh, the mall is closed.
+    N = n
+    first = me
+    repeat yield(); other = second until other -- Wait for another creature.
+    second = nil
+    yield() -- Be nice and let others meet up.
+  end
+  return other
+end
+
+-- Create a very social creature.
+local function creature(color)
+  return create(function()
+    local me = color
+    for met=0,1000000000 do
+      local other = meet(me)
+      if not other then return met end
+      if me ~= other then
+        if me == "blue" then me = other == "red" and "yellow" or "red"
+        elseif me == "red" then me = other == "blue" and "yellow" or "blue"
+        else me = other == "blue" and "red" or "blue" end
+      end
+    end
+  end)
+end
+
+-- Trivial round-robin scheduler.
+local function schedule(threads)
+  local resume = resume
+  local nthreads, meetings = #threads, 0
+  repeat
+    for i=1,nthreads do
+      local thr = threads[i]
+      if not thr then return meetings end
+      local ok, met = resume(thr)
+      if met then
+        meetings = meetings + met
+        threads[i] = nil
+      end
+    end
+  until false
+end
+
+-- A bunch of colorful creatures.
+local threads = {
+  creature("blue"),
+  creature("red"),
+  creature("yellow"),
+  creature("blue"),
+}
+
+io.write(schedule(threads), "\n")
diff --git a/perf/LuaJIT-benches/coroutine-ring.lua b/perf/LuaJIT-benches/coroutine-ring.lua
new file mode 100644
index 00000000..1e8c5ef6
--- /dev/null
+++ b/perf/LuaJIT-benches/coroutine-ring.lua
@@ -0,0 +1,42 @@
+-- The Computer Language Benchmarks Game
+-- http://shootout.alioth.debian.org/
+-- contributed by Sam Roberts
+-- reviewed by Bruno Massa
+
+local n         = tonumber(arg and arg[1]) or 2e7
+
+-- fixed size pool
+local poolsize  = 503
+local threads   = {}
+
+-- cache these to avoid global environment lookups
+local create    = coroutine.create
+local resume    = coroutine.resume
+local yield     = coroutine.yield
+
+local id        = 1
+local token     = 0
+local ok
+
+local body = function(token)
+  while true do
+    token = yield(token + 1)
+  end
+end
+
+-- create all threads
+for id = 1, poolsize do
+  threads[id] = create(body)
+end
+
+-- send the token
+repeat
+  if id == poolsize then
+    id = 1
+  else
+    id = id + 1
+  end
+  ok, token = resume(threads[id], token)
+until token == n
+
+io.write(id, "\n")
diff --git a/perf/LuaJIT-benches/euler14-bit.lua b/perf/LuaJIT-benches/euler14-bit.lua
new file mode 100644
index 00000000..537f2bf3
--- /dev/null
+++ b/perf/LuaJIT-benches/euler14-bit.lua
@@ -0,0 +1,22 @@
+
+local bit = require("bit")
+local bnot, bor, band = bit.bnot, bit.bor, bit.band
+local shl, shr = bit.lshift, bit.rshift
+
+local N = tonumber(arg and arg[1]) or 10000000
+local cache, m, n = { 1 }, 1, 1
+if arg and arg[2] then cache = nil end
+for i=2,N do
+  local j = i
+  for len=1,1000000000 do
+    j = bor(band(shr(j,1), band(j,1)-1), band(shl(j,1)+j+1, bnot(band(j,1)-1)))
+    if cache then
+      local x = cache[j]; if x then j = x+len; break end
+    elseif j == 1 then
+      j = len+1; break
+    end
+  end
+  if cache then cache[i] = j end
+  if j > m then m, n = j, i end
+end
+io.write("Found ", n, " (chain length: ", m, ")\n")
diff --git a/perf/LuaJIT-benches/fannkuch.lua b/perf/LuaJIT-benches/fannkuch.lua
new file mode 100644
index 00000000..2a4cd426
--- /dev/null
+++ b/perf/LuaJIT-benches/fannkuch.lua
@@ -0,0 +1,50 @@
+
+local function fannkuch(n)
+  local p, q, s, odd, check, maxflips = {}, {}, {}, true, 0, 0
+  for i=1,n do p[i] = i; q[i] = i; s[i] = i end
+  repeat
+    -- Print max. 30 permutations.
+    if check < 30 then
+      if not p[n] then return maxflips end	-- Catch n = 0, 1, 2.
+      io.write(unpack(p)); io.write("\n")
+      check = check + 1
+    end
+    -- Copy and flip.
+    local q1 = p[1]				-- Cache 1st element.
+    if p[n] ~= n and q1 ~= 1 then		-- Avoid useless work.
+      for i=2,n do q[i] = p[i] end		-- Work on a copy.
+      local flips = 1			-- Flip ...
+      while true do
+	local qq = q[q1]
+	if qq == 1 then				-- ... until 1st element is 1.
+	  if flips > maxflips then maxflips = flips end -- New maximum?
+	  break
+	end
+	q[q1] = q1
+	if q1 >= 4 then
+	  local i, j = 2, q1 - 1
+	  repeat q[i], q[j] = q[j], q[i]; i = i + 1; j = j - 1; until i >= j
+	end
+	q1 = qq
+	flips=flips+1
+      end
+    end
+    -- Permute.
+    if odd then
+      p[2], p[1] = p[1], p[2]; odd = false	-- Rotate 1<-2.
+    else
+      p[2], p[3] = p[3], p[2]; odd = true	-- Rotate 1<-2 and 1<-2<-3.
+      for i=3,n do
+	local sx = s[i]
+	if sx ~= 1 then s[i] = sx-1; break end
+	if i == n then return maxflips end	-- Out of permutations.
+	s[i] = i
+	-- Rotate 1<-...<-i+1.
+	local t=p[1]; for j=i+1,1,-1 do p[j],t=t,p[j] end
+      end
+    end
+  until false
+end
+
+local n = tonumber(arg and arg[1]) or 1
+io.write("Pfannkuchen(", n, ") = ", fannkuch(n), "\n")
diff --git a/perf/LuaJIT-benches/fasta.lua b/perf/LuaJIT-benches/fasta.lua
new file mode 100644
index 00000000..7ce60804
--- /dev/null
+++ b/perf/LuaJIT-benches/fasta.lua
@@ -0,0 +1,95 @@
+
+local Last = 42
+local function random(max)
+  local y = (Last * 3877 + 29573) % 139968
+  Last = y
+  return (max * y) / 139968
+end
+
+local function make_repeat_fasta(id, desc, s, n)
+  local write, sub = io.write, string.sub
+  write(">", id, " ", desc, "\n")
+  local p, sn, s2 = 1, #s, s..s
+  for i=60,n,60 do
+    write(sub(s2, p, p + 59), "\n")
+    p = p + 60; if p > sn then p = p - sn end
+  end
+  local tail = n % 60
+  if tail > 0 then write(sub(s2, p, p + tail-1), "\n") end
+end
+
+local function make_random_fasta(id, desc, bs, n)
+  io.write(">", id, " ", desc, "\n")
+  loadstring([=[
+    local write, char, unpack, n, random = io.write, string.char, unpack, ...
+    local buf, p = {}, 1
+    for i=60,n,60 do
+      for j=p,p+59 do ]=]..bs..[=[ end
+      buf[p+60] = 10; p = p + 61
+      if p >= 2048 then write(char(unpack(buf, 1, p-1))); p = 1 end
+    end
+    local tail = n % 60
+    if tail > 0 then
+      for j=p,p+tail-1 do ]=]..bs..[=[ end
+      p = p + tail; buf[p] = 10; p = p + 1
+    end
+    write(char(unpack(buf, 1, p-1)))
+  ]=], desc)(n, random)
+end
+
+local function bisect(c, p, lo, hi)
+  local n = hi - lo
+  if n == 0 then return "buf[j] = "..c[hi].."\n" end
+  local mid = math.floor(n / 2)
+  return "if r < "..p[lo+mid].." then\n"..bisect(c, p, lo, lo+mid)..
+         "else\n"..bisect(c, p, lo+mid+1, hi).."end\n"
+end
+
+local function make_bisect(tab)
+  local c, p, sum = {}, {}, 0
+  for i,row in ipairs(tab) do
+    c[i] = string.byte(row[1])
+    sum = sum + row[2]
+    p[i] = sum
+  end
+  return "local r = random(1)\n"..bisect(c, p, 1, #tab)
+end
+
+local alu =
+  "GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTTGG"..
+  "GAGGCCGAGGCGGGCGGATCACCTGAGGTCAGGAGTTCGAGA"..
+  "CCAGCCTGGCCAACATGGTGAAACCCCGTCTCTACTAAAAAT"..
+  "ACAAAAATTAGCCGGGCGTGGTGGCGCGCGCCTGTAATCCCA"..
+  "GCTACTCGGGAGGCTGAGGCAGGAGAATCGCTTGAACCCGGG"..
+  "AGGCGGAGGTTGCAGTGAGCCGAGATCGCGCCACTGCACTCC"..
+  "AGCCTGGGCGACAGAGCGAGACTCCGTCTCAAAAA"
+
+local iub = make_bisect{
+  { "a", 0.27 },
+  { "c", 0.12 },
+  { "g", 0.12 },
+  { "t", 0.27 },
+  { "B", 0.02 },
+  { "D", 0.02 },
+  { "H", 0.02 },
+  { "K", 0.02 },
+  { "M", 0.02 },
+  { "N", 0.02 },
+  { "R", 0.02 },
+  { "S", 0.02 },
+  { "V", 0.02 },
+  { "W", 0.02 },
+  { "Y", 0.02 },
+}
+
+local homosapiens = make_bisect{
+  { "a", 0.3029549426680 },
+  { "c", 0.1979883004921 },
+  { "g", 0.1975473066391 },
+  { "t", 0.3015094502008 },
+}
+
+local N = tonumber(arg and arg[1]) or 1000
+make_repeat_fasta('ONE', 'Homo sapiens alu', alu, N*2)
+make_random_fasta('TWO', 'IUB ambiguity codes', iub, N*3)
+make_random_fasta('THREE', 'Homo sapiens frequency', homosapiens, N*5)
diff --git a/perf/LuaJIT-benches/k-nucleotide.lua b/perf/LuaJIT-benches/k-nucleotide.lua
new file mode 100644
index 00000000..0bfb41be
--- /dev/null
+++ b/perf/LuaJIT-benches/k-nucleotide.lua
@@ -0,0 +1,58 @@
+
+local function kfrequency(seq, freq, k, frame)
+  local sub = string.sub
+  local k1 = k - 1
+  for i=frame,#seq-k1,k do
+    local c = sub(seq, i, i+k1)
+    freq[c] = (freq[c] or 0) + 1
+  end
+end
+
+local function count(seq, frag)
+  local k = #frag
+  local freq = {}
+  for frame=1,k do kfrequency(seq, freq, k, frame) end
+  io.write(freq[frag] or 0, "\t", frag, "\n")
+end
+
+local function frequency(seq, k)
+  local freq = {}
+  for frame=1,k do kfrequency(seq, freq, k, frame) end
+  local sfreq, sn, sum = {}, 1, 0
+  for c,v in pairs(freq) do sfreq[sn] = c; sn = sn + 1; sum = sum + v end
+  table.sort(sfreq, function(a, b)
+    local fa, fb = freq[a], freq[b]
+    return fa == fb and a > b or fa > fb
+  end)
+  for _,c in ipairs(sfreq) do
+    io.write(string.format("%s %0.3f\n", c, (freq[c]*100)/sum))
+  end
+  io.write("\n")
+end
+
+local function readseq()
+  local sub = string.sub
+  for line in io.lines() do
+    if sub(line, 1, 1) == ">" and sub(line, 2, 6) == "THREE" then break end
+  end
+  local lines, ln = {}, 0
+  for line in io.lines() do
+    local c = sub(line, 1, 1)
+    if c == ">" then
+      break
+    elseif c ~= ";" then
+      ln = ln + 1
+      lines[ln] = line
+    end
+  end
+  return string.upper(table.concat(lines, "", 1, ln))
+end
+
+local seq = readseq()
+frequency(seq, 1)
+frequency(seq, 2)
+count(seq, "GGT")
+count(seq, "GGTA")
+count(seq, "GGTATT")
+count(seq, "GGTATTTTAATT")
+count(seq, "GGTATTTTAATTTATAGT")
diff --git a/perf/LuaJIT-benches/life.lua b/perf/LuaJIT-benches/life.lua
new file mode 100644
index 00000000..911d9fe1
--- /dev/null
+++ b/perf/LuaJIT-benches/life.lua
@@ -0,0 +1,111 @@
+-- life.lua
+-- original by Dave Bollinger <DBollinger@compuserve.com> posted to lua-l
+-- modified to use ANSI terminal escape sequences
+-- modified to use for instead of while
+
+local write=io.write
+
+ALIVE="¥"	DEAD="þ"
+ALIVE="O"	DEAD="-"
+
+function delay() -- NOTE: SYSTEM-DEPENDENT, adjust as necessary
+  for i=1,10000 do end
+  -- local i=os.clock()+1 while(os.clock()<i) do end
+end
+
+function ARRAY2D(w,h)
+  local t = {w=w,h=h}
+  for y=1,h do
+    t[y] = {}
+    for x=1,w do
+      t[y][x]=0
+    end
+  end
+  return t
+end
+
+_CELLS = {}
+
+-- give birth to a "shape" within the cell array
+function _CELLS:spawn(shape,left,top)
+  for y=0,shape.h-1 do
+    for x=0,shape.w-1 do
+      self[top+y][left+x] = shape[y*shape.w+x+1]
+    end
+  end
+end
+
+-- run the CA and produce the next generation
+function _CELLS:evolve(next)
+  local ym1,y,yp1,yi=self.h-1,self.h,1,self.h
+  while yi > 0 do
+    local xm1,x,xp1,xi=self.w-1,self.w,1,self.w
+    while xi > 0 do
+      local sum = self[ym1][xm1] + self[ym1][x] + self[ym1][xp1] +
+                  self[y][xm1] + self[y][xp1] +
+                  self[yp1][xm1] + self[yp1][x] + self[yp1][xp1]
+      next[y][x] = ((sum==2) and self[y][x]) or ((sum==3) and 1) or 0
+      xm1,x,xp1,xi = x,xp1,xp1+1,xi-1
+    end
+    ym1,y,yp1,yi = y,yp1,yp1+1,yi-1
+  end
+end
+
+-- output the array to screen
+function _CELLS:draw()
+  local out="" -- accumulate to reduce flicker
+  for y=1,self.h do
+   for x=1,self.w do
+      out=out..(((self[y][x]>0) and ALIVE) or DEAD)
+    end
+    out=out.."\n"
+  end
+  write(out)
+end
+
+-- constructor
+function CELLS(w,h)
+  local c = ARRAY2D(w,h)
+  c.spawn = _CELLS.spawn
+  c.evolve = _CELLS.evolve
+  c.draw = _CELLS.draw
+  return c
+end
+
+--
+-- shapes suitable for use with spawn() above
+--
+HEART = { 1,0,1,1,0,1,1,1,1; w=3,h=3 }
+GLIDER = { 0,0,1,1,0,1,0,1,1; w=3,h=3 }
+EXPLODE = { 0,1,0,1,1,1,1,0,1,0,1,0; w=3,h=4 }
+FISH = { 0,1,1,1,1,1,0,0,0,1,0,0,0,0,1,1,0,0,1,0; w=5,h=4 }
+BUTTERFLY = { 1,0,0,0,1,0,1,1,1,0,1,0,0,0,1,1,0,1,0,1,1,0,0,0,1; w=5,h=5 }
+
+-- the main routine
+function LIFE(w,h)
+  -- create two arrays
+  local thisgen = CELLS(w,h)
+  local nextgen = CELLS(w,h)
+
+  -- create some life
+  -- about 1000 generations of fun, then a glider steady-state
+  thisgen:spawn(GLIDER,5,4)
+  thisgen:spawn(EXPLODE,25,10)
+  thisgen:spawn(FISH,4,12)
+
+  -- run until break
+  local gen=1
+  write("\027[2J")	-- ANSI clear screen
+  while 1 do
+    thisgen:evolve(nextgen)
+    thisgen,nextgen = nextgen,thisgen
+    write("\027[H")	-- ANSI home cursor
+    thisgen:draw()
+    write("Life - generation ",gen,"\n")
+    gen=gen+1
+    if gen>2000 then break end
+    --delay()		-- no delay
+  end
+end
+
+LIFE(40,20)
diff --git a/perf/LuaJIT-benches/mandelbrot-bit.lua b/perf/LuaJIT-benches/mandelbrot-bit.lua
new file mode 100644
index 00000000..91d96975
--- /dev/null
+++ b/perf/LuaJIT-benches/mandelbrot-bit.lua
@@ -0,0 +1,33 @@
+
+local bit = require("bit")
+local bor, band = bit.bor, bit.band
+local shl, shr, rol = bit.lshift, bit.rshift, bit.rol
+local write, char, unpack = io.write, string.char, unpack
+local N = tonumber(arg and arg[1]) or 100
+local M, buf = 2/N, {}
+write("P4\n", N, " ", N, "\n")
+for y=0,N-1 do
+  local Ci, b, p = y*M-1, -16777216, 0
+  local Ciq = Ci*Ci
+  for x=0,N-1,2 do
+    local Cr, Cr2 = x*M-1.5, (x+1)*M-1.5
+    local Zr, Zi, Zrq, Ziq = Cr, Ci, Cr*Cr, Ciq
+    local Zr2, Zi2, Zrq2, Ziq2 = Cr2, Ci, Cr2*Cr2, Ciq
+    b = rol(b, 2)
+    for i=1,49 do
+      Zi = Zr*Zi*2 + Ci; Zi2 = Zr2*Zi2*2 + Ci
+      Zr = Zrq-Ziq + Cr; Zr2 = Zrq2-Ziq2 + Cr2
+      Ziq = Zi*Zi; Ziq2 = Zi2*Zi2
+      Zrq = Zr*Zr; Zrq2 = Zr2*Zr2
+      if band(b, 2) ~= 0 and Zrq+Ziq > 4.0 then b = band(b, -3) end
+      if band(b, 1) ~= 0 and Zrq2+Ziq2 > 4.0 then b = band(b, -2) end
+      if band(b, 3) == 0 then break end
+    end
+    if b >= 0 then p = p + 1; buf[p] = b; b = -16777216; end
+  end
+  if b ~= -16777216 then
+    if band(N, 1) ~= 0 then b = shr(b, 1) end
+    p = p + 1; buf[p] = shl(b, 8-band(N, 7))
+  end
+  write(char(unpack(buf, 1, p)))
+end
diff --git a/perf/LuaJIT-benches/mandelbrot.lua b/perf/LuaJIT-benches/mandelbrot.lua
new file mode 100644
index 00000000..0ef595a2
--- /dev/null
+++ b/perf/LuaJIT-benches/mandelbrot.lua
@@ -0,0 +1,23 @@
+
+local write, char, unpack = io.write, string.char, unpack
+local N = tonumber(arg and arg[1]) or 100
+local M, ba, bb, buf = 2/N, 2^(N%8+1)-1, 2^(8-N%8), {}
+write("P4\n", N, " ", N, "\n")
+for y=0,N-1 do
+  local Ci, b, p = y*M-1, 1, 0
+  for x=0,N-1 do
+    local Cr = x*M-1.5
+    local Zr, Zi, Zrq, Ziq = Cr, Ci, Cr*Cr, Ci*Ci
+    b = b + b
+    for i=1,49 do
+      Zi = Zr*Zi*2 + Ci
+      Zr = Zrq-Ziq + Cr
+      Ziq = Zi*Zi
+      Zrq = Zr*Zr
+      if Zrq+Ziq > 4.0 then b = b + 1; break; end
+    end
+    if b >= 256 then p = p + 1; buf[p] = 511 - b; b = 1; end
+  end
+  if b ~= 1 then p = p + 1; buf[p] = (ba-b)*bb; end
+  write(char(unpack(buf, 1, p)))
+end
diff --git a/perf/LuaJIT-benches/md5.lua b/perf/LuaJIT-benches/md5.lua
new file mode 100644
index 00000000..fdf6b4a7
--- /dev/null
+++ b/perf/LuaJIT-benches/md5.lua
@@ -0,0 +1,183 @@
+
+local bit = require("bit")
+local tobit, tohex, bnot = bit.tobit or bit.cast, bit.tohex, bit.bnot
+local bor, band, bxor = bit.bor, bit.band, bit.bxor
+local lshift, rshift, rol, bswap = bit.lshift, bit.rshift, bit.rol, bit.bswap
+local byte, char, sub, rep = string.byte, string.char, string.sub, string.rep
+
+if not rol then -- Replacement function if rotates are missing.
+  local bor, shl, shr = bit.bor, bit.lshift, bit.rshift
+  function rol(a, b) return bor(shl(a, b), shr(a, 32-b)) end
+end
+
+if not bswap then -- Replacement function if bswap is missing.
+  local bor, band, shl, shr = bit.bor, bit.band, bit.lshift, bit.rshift
+  function bswap(a)
+    return bor(shr(a, 24), band(shr(a, 8), 0xff00),
+	       shl(band(a, 0xff00), 8), shl(a, 24));
+  end
+end
+
+if not tohex then -- (Unreliable) replacement function if tohex is missing.
+  function tohex(a)
+    return string.sub(string.format("%08x", a), -8)
+  end
+end
+
+local function tr_f(a, b, c, d, x, s)
+  return rol(bxor(d, band(b, bxor(c, d))) + a + x, s) + b
+end
+
+local function tr_g(a, b, c, d, x, s)
+  return rol(bxor(c, band(d, bxor(b, c))) + a + x, s) + b
+end
+
+local function tr_h(a, b, c, d, x, s)
+  return rol(bxor(b, c, d) + a + x, s) + b
+end
+
+local function tr_i(a, b, c, d, x, s)
+  return rol(bxor(c, bor(b, bnot(d))) + a + x, s) + b
+end
+
+local function transform(x, a1, b1, c1, d1)
+  local a, b, c, d = a1, b1, c1, d1
+
+  a = tr_f(a, b, c, d, x[ 1] + 0xd76aa478,  7)
+  d = tr_f(d, a, b, c, x[ 2] + 0xe8c7b756, 12)
+  c = tr_f(c, d, a, b, x[ 3] + 0x242070db, 17)
+  b = tr_f(b, c, d, a, x[ 4] + 0xc1bdceee, 22)
+  a = tr_f(a, b, c, d, x[ 5] + 0xf57c0faf,  7)
+  d = tr_f(d, a, b, c, x[ 6] + 0x4787c62a, 12)
+  c = tr_f(c, d, a, b, x[ 7] + 0xa8304613, 17)
+  b = tr_f(b, c, d, a, x[ 8] + 0xfd469501, 22)
+  a = tr_f(a, b, c, d, x[ 9] + 0x698098d8,  7)
+  d = tr_f(d, a, b, c, x[10] + 0x8b44f7af, 12)
+  c = tr_f(c, d, a, b, x[11] + 0xffff5bb1, 17)
+  b = tr_f(b, c, d, a, x[12] + 0x895cd7be, 22)
+  a = tr_f(a, b, c, d, x[13] + 0x6b901122,  7)
+  d = tr_f(d, a, b, c, x[14] + 0xfd987193, 12)
+  c = tr_f(c, d, a, b, x[15] + 0xa679438e, 17)
+  b = tr_f(b, c, d, a, x[16] + 0x49b40821, 22)
+
+  a = tr_g(a, b, c, d, x[ 2] + 0xf61e2562,  5)
+  d = tr_g(d, a, b, c, x[ 7] + 0xc040b340,  9)
+  c = tr_g(c, d, a, b, x[12] + 0x265e5a51, 14)
+  b = tr_g(b, c, d, a, x[ 1] + 0xe9b6c7aa, 20)
+  a = tr_g(a, b, c, d, x[ 6] + 0xd62f105d,  5)
+  d = tr_g(d, a, b, c, x[11] + 0x02441453,  9)
+  c = tr_g(c, d, a, b, x[16] + 0xd8a1e681, 14)
+  b = tr_g(b, c, d, a, x[ 5] + 0xe7d3fbc8, 20)
+  a = tr_g(a, b, c, d, x[10] + 0x21e1cde6,  5)
+  d = tr_g(d, a, b, c, x[15] + 0xc33707d6,  9)
+  c = tr_g(c, d, a, b, x[ 4] + 0xf4d50d87, 14)
+  b = tr_g(b, c, d, a, x[ 9] + 0x455a14ed, 20)
+  a = tr_g(a, b, c, d, x[14] + 0xa9e3e905,  5)
+  d = tr_g(d, a, b, c, x[ 3] + 0xfcefa3f8,  9)
+  c = tr_g(c, d, a, b, x[ 8] + 0x676f02d9, 14)
+  b = tr_g(b, c, d, a, x[13] + 0x8d2a4c8a, 20)
+
+  a = tr_h(a, b, c, d, x[ 6] + 0xfffa3942,  4)
+  d = tr_h(d, a, b, c, x[ 9] + 0x8771f681, 11)
+  c = tr_h(c, d, a, b, x[12] + 0x6d9d6122, 16)
+  b = tr_h(b, c, d, a, x[15] + 0xfde5380c, 23)
+  a = tr_h(a, b, c, d, x[ 2] + 0xa4beea44,  4)
+  d = tr_h(d, a, b, c, x[ 5] + 0x4bdecfa9, 11)
+  c = tr_h(c, d, a, b, x[ 8] + 0xf6bb4b60, 16)
+  b = tr_h(b, c, d, a, x[11] + 0xbebfbc70, 23)
+  a = tr_h(a, b, c, d, x[14] + 0x289b7ec6,  4)
+  d = tr_h(d, a, b, c, x[ 1] + 0xeaa127fa, 11)
+  c = tr_h(c, d, a, b, x[ 4] + 0xd4ef3085, 16)
+  b = tr_h(b, c, d, a, x[ 7] + 0x04881d05, 23)
+  a = tr_h(a, b, c, d, x[10] + 0xd9d4d039,  4)
+  d = tr_h(d, a, b, c, x[13] + 0xe6db99e5, 11)
+  c = tr_h(c, d, a, b, x[16] + 0x1fa27cf8, 16)
+  b = tr_h(b, c, d, a, x[ 3] + 0xc4ac5665, 23)
+
+  a = tr_i(a, b, c, d, x[ 1] + 0xf4292244,  6)
+  d = tr_i(d, a, b, c, x[ 8] + 0x432aff97, 10)
+  c = tr_i(c, d, a, b, x[15] + 0xab9423a7, 15)
+  b = tr_i(b, c, d, a, x[ 6] + 0xfc93a039, 21)
+  a = tr_i(a, b, c, d, x[13] + 0x655b59c3,  6)
+  d = tr_i(d, a, b, c, x[ 4] + 0x8f0ccc92, 10)
+  c = tr_i(c, d, a, b, x[11] + 0xffeff47d, 15)
+  b = tr_i(b, c, d, a, x[ 2] + 0x85845dd1, 21)
+  a = tr_i(a, b, c, d, x[ 9] + 0x6fa87e4f,  6)
+  d = tr_i(d, a, b, c, x[16] + 0xfe2ce6e0, 10)
+  c = tr_i(c, d, a, b, x[ 7] + 0xa3014314, 15)
+  b = tr_i(b, c, d, a, x[14] + 0x4e0811a1, 21)
+  a = tr_i(a, b, c, d, x[ 5] + 0xf7537e82,  6)
+  d = tr_i(d, a, b, c, x[12] + 0xbd3af235, 10)
+  c = tr_i(c, d, a, b, x[ 3] + 0x2ad7d2bb, 15)
+  b = tr_i(b, c, d, a, x[10] + 0xeb86d391, 21)
+
+  return tobit(a+a1), tobit(b+b1), tobit(c+c1), tobit(d+d1)
+end
+
+-- Note: this is copying the original string and NOT particularly fast.
+-- A library for struct unpacking would make this task much easier.
+local function md5(msg)
+  local len = #msg
+  msg = msg.."\128"..rep("\0", 63 - band(len + 8, 63))
+	   ..char(band(lshift(len, 3), 255), band(rshift(len, 5), 255),
+		  band(rshift(len, 13), 255), band(rshift(len, 21), 255))
+	   .."\0\0\0\0"
+  local a, b, c, d = 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476
+  local x, k = {}, 1
+  for i=1,#msg,4 do
+    local m0, m1, m2, m3 = byte(msg, i, i+3)
+    x[k] = bor(m0, lshift(m1, 8), lshift(m2, 16), lshift(m3, 24))
+    if k == 16 then
+      a, b, c, d = transform(x, a, b, c, d)
+      k = 1
+    else
+      k = k + 1
+    end
+  end
+  return tohex(bswap(a))..tohex(bswap(b))..tohex(bswap(c))..tohex(bswap(d))
+end
+
+assert(md5('') == 'd41d8cd98f00b204e9800998ecf8427e')
+assert(md5('a') == '0cc175b9c0f1b6a831c399e269772661')
+assert(md5('abc') == '900150983cd24fb0d6963f7d28e17f72')
+assert(md5('message digest') == 'f96b697d7cb7938d525a2f31aaf161d0')
+assert(md5('abcdefghijklmnopqrstuvwxyz') == 'c3fcd3d76192e4007dfb496cca67e13b')
+assert(md5('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789') ==
+       'd174ab98d277d9f5a5611c2c9f419d9f')
+assert(md5('12345678901234567890123456789012345678901234567890123456789012345678901234567890') ==
+       '57edf4a22be3c955ac49da2e2107b67a')
+
+local N = tonumber(arg and arg[1]) or 10000
+
+  -- Credits: William Shakespeare, Romeo and Juliet
+local txt = [[Rebellious subjects, enemies to peace,
+Profaners of this neighbour-stained steel,--
+Will they not hear? What, ho! you men, you beasts,
+That quench the fire of your pernicious rage
+With purple fountains issuing from your veins,
+On pain of torture, from those bloody hands
+Throw your mistemper'd weapons to the ground,
+And hear the sentence of your moved prince.
+Three civil brawls, bred of an airy word,
+By thee, old Capulet, and Montague,
+Have thrice disturb'd the quiet of our streets,
+And made Verona's ancient citizens
+Cast by their grave beseeming ornaments,
+To wield old partisans, in hands as old,
+Canker'd with peace, to part your canker'd hate:
+If ever you disturb our streets again,
+Your lives shall pay the forfeit of the peace.
+For this time, all the rest depart away:
+You Capulet; shall go along with me:
+And, Montague, come you this afternoon,
+To know our further pleasure in this case,
+To old Free-town, our common judgment-place.
+Once more, on pain of death, all men depart.]]
+  txt = txt..txt..txt..txt
+  txt = txt..txt..txt..txt
+
+for i=1,N do
+  res = md5(txt)
+end
+assert(res == 'a831e91e0f70eddcb70dc61c6f82f6cd')
+
diff --git a/perf/LuaJIT-benches/meteor.lua b/perf/LuaJIT-benches/meteor.lua
new file mode 100644
index 00000000..80588ab5
--- /dev/null
+++ b/perf/LuaJIT-benches/meteor.lua
@@ -0,0 +1,220 @@
+
+-- Generate a decision tree based solver for the meteor puzzle.
+local function generatesolver(countinit)
+  local pairs, ipairs, format = pairs, ipairs, string.format
+  local byte, min, sort = string.byte, math.min, table.sort
+
+  -- Cached position to distance lookup.
+  local dist = setmetatable({}, { __index = function(t, xy)
+    local x = xy%10; local y = (xy-x)/10
+    if (x+y)%2 == 1 then y = y + 1; x = 10 - x end
+    local d = xy + 256*x*x + 1024*y*y; t[xy] = d; return d
+  end})
+
+  -- Lookup table to validate a cell and to find its successor.
+  local ok = {}
+  for i=0,150 do ok[i] = false end
+  for i=99,0,-1 do
+    local x = i%10
+    if ((i-x)/10+x)%2 == 0 then
+      ok[i] = i + (ok[i+1] and 1 or (ok[i+2] and 2 or 3))
+    end
+  end
+
+  -- Temporary board state for the island checks.
+  local islands, slide = {}, {20,22,24,26,28,31,33,35,37,39}
+  local bbc, bb = 0, {}
+  for i=0,19 do bb[i] = false; bb[i+80] = false end
+  for i=20,79 do bb[i] = ok[i] end
+
+  -- Recursive flood fill algorithm.
+  local function fill(bb, p)
+    bbc = bbc + 1
+    local n = p+2; if bb[n] then bb[n] = false; fill(bb, n) end
+    n = p-2; if bb[n] then bb[n] = false; fill(bb, n) end
+    n = p-9; if bb[n] then bb[n] = false; fill(bb, n) end
+    n = p-11; if bb[n] then bb[n] = false; fill(bb, n) end
+    n = p+9; if bb[n] then bb[n] = false; fill(bb, n) end
+    n = p+11; if bb[n] then bb[n] = false; fill(bb, n) end
+  end
+
+  -- Generate pruned, sliding decision trees.
+  local dtrees = {{}, {}, {}, {}, {}, {}, {}, {}, {}, {}}
+  local rot = { nil, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {} }
+  for k=0,9 do
+    -- Generate 10 initial pieces from line noise. :-)
+    local t = { 60, 62, byte("@BMBIK@KT@GPIKR@IKIKT@GK@KM@BG", k*3+1, k*3+3) }
+    rot[1] = t
+    for i,xy in ipairs(t) do
+      local x = xy%10; local y = (xy-x-60)/10
+      -- Add 11 more variations by rotating and flipping.
+      for j=2,12 do
+	if j == 7 then y = -y else x,y = (x+3*y)/2, (y-x)/2 end
+	rot[j][i] = x+10*y
+      end
+    end
+    for r,v in ipairs(rot) do
+      -- Exploit symmetry and leave out half of the orientations of one piece.
+      -- The selected piece gives the best reduction of the solution space.
+      if k ~= 3 or r%2 == 0 then
+	-- Normalize to origin, add distance, sort by distance from origin.
+	local m = min(v[1], v[2], v[3], v[4], v[5])
+	for i=1,5 do v[i] = dist[v[i]-m] end
+	sort(v)
+	local v2, v3, v4, v5 = v[2]%256, v[3]%256, v[4]%256, v[5]%256
+	-- Slide the piece across 2 rows, prune the tree, check for islands.
+	for j,p in ipairs(slide) do
+	  bb[p] = false
+	  if ok[p+v2] and ok[p+v3] and ok[p+v4] and ok[p+v5] then -- Prune.
+	    for i=p+1,79 do bb[i] = ok[i] end -- Clear remaining board.
+	    bb[p+v2] = false; bb[p+v3] = false -- Add piece.
+	    bb[p+v4] = false; bb[p+v5] = false
+	    bbc = j -- Flood fill and count the filled positions.
+	    if bb[71] then bb[71] = false; fill(bb, 71) end -- Lower left.
+	    if bb[79] then bb[79] = false; fill(bb, 79) end -- Lower right.
+	    local di = 0
+	    if bbc < 22 then bbc = 26
+	    elseif bbc < 26 then -- Island found, locate it, fill from above.
+	      for i=p+2,79 do if bb[i] then di = i-p; break end end
+	      for i=p-9,p-1 do if ok[i] then fill(bb, i) bbc = bbc - 1 end end
+	    end
+	    if bbc == 26 then -- Prune boards with static islands.
+	      local tb = dtrees[j] -- Build decision tree in distance order.
+	      local ta = tb[v2]; if not ta then ta = {}; tb[v2] = ta end
+	      tb = ta[v3]; if not tb then tb = {}; ta[v3] = tb end
+	      ta = tb[v4]; if not ta then ta = {}; tb[v4] = ta; islands[ta] = di
+	      elseif islands[ta] ~= di then islands[ta] = 0 end
+	      ta[v5] = di*10+k -- Leaves hold island check and piece number.
+	    end
+	  end
+	end
+      end
+    end
+  end
+
+  local s = "local u0,u1,u2,u3,u4,u5,u6,u7,u8,u9" -- Piece use flags.
+  for p=0,99 do if ok[p] then s = s..",b"..p end end -- Board cells.
+  s = s.."\n"..[[
+local countinit = ...
+local count = countinit
+local bmin, bmax, pcs = 9, 0, {}
+local smin, smax
+local write, reverse = io.write, string.reverse
+
+-- Print min/max boards.
+local function printboard(s)
+  local flip = true
+  for x in string.gmatch(string.gsub(s, ".", "%1 "), "..........") do
+    write(x, flip and "\n " or "\n")
+    flip = not flip
+  end
+  write("\n")
+end
+
+-- Print result.
+local function printresult()
+  write(countinit-count, " solutions found\n\n")
+  printboard(smin)
+  printboard(smax)
+end
+
+-- Generate piece lookup array from the order of use.
+local function genp()
+  local p = pcs
+  p[u0] = "0" p[u1] = "1" p[u2] = "2" p[u3] = "3" p[u4] = "4"
+  p[u5] = "5" p[u6] = "6" p[u7] = "7" p[u8] = "8" p[u9] = "9"
+  return p
+end
+
+-- Goal function.
+local function f91(k)
+  if k ~= 10 then return end
+  count = count - 2 -- Need to count the symmetric solution, too.
+  repeat
+    -- Quick precheck before constructing the string.
+    local b0, b99 = b0, b99
+    if b0 <= bmin then bmin = b0 elseif b0 >= bmax then bmax = b0
+    elseif b99 <= bmin then bmin = b99 elseif b99 >= bmax then bmax = b99
+    else break end
+    -- Translate the filled board to a string.
+    local p = genp()
+    local s = p[b0] ]]
+  for p=2,99 do if ok[p] then s = s.."..p[b"..p.."]" end end
+  s = s..[[
+    -- Remember min/max boards, dito for the symmetric board.
+    if not smin then smin = s; smax = s
+    elseif s < smin then smin = s elseif s > smax then smax = s end
+    s = reverse(s)
+    if s < smin then smin = s elseif s > smax then smax = s end
+  until true
+  if count <= 0 then error() end -- Early abort if max count given.
+end
+local f93 = f91
+]]
+
+  -- Recursively convert the decision tree to Lua code.
+  local function codetree(tree, d, p, pn)
+    local found, s = false, ""
+    d = d + 1
+    for a,t in pairs(tree) do
+      local b = p+a
+      if b < 100 then -- Prune the tree at the lower border.
+	local pp = b ~= pn and pn or ok[b] -- Find maximum successor function.
+	if d >= 5 then -- Try to place the last cell of a piece and advance.
+	  found = true
+	  local u = t%10
+	  local di = (t-u)/10
+	  if di ~= 0 and d == 5 then
+	    di = di + p; if pp == di then pp = ok[di] end
+	    s = format("%sif b%d and not u%d and not b%d then b%d=k u%d=k f%d(k) u%d=N b%d=N end\n",
+		       s, di, u, b, b, u, pp, u, b)
+	  else
+	    s = format("%sif not u%d and not b%d then b%d=k u%d=k f%d(k) u%d=N b%d=N end\n",
+		       s, u, b, b, u, pp, u, b)
+	  end
+	else -- Try to place an intermediate cell.
+	  local di = d ~= 4 and 0 or islands[t]
+	  if di == 0 then
+	    local st = codetree(t, d, p, pp)
+	    if st then
+	      found = true
+	      s = format("%sif not b%d then b%d=k\n%sb%d=N end\n", s, b, b, st, b)
+	    end
+	  else -- Combine island checks.
+	    di = di + p; if pp == di then pp = ok[di] end
+	    local st = codetree(t, 6, p, pp)
+	    if st then
+	      found = true
+	      s = format("%sif b%d and not b%d then b%d=k\n%sb%d=N end\n", s, di, b, b, st, b)
+	    end
+	  end
+	end
+      end
+    end
+    return found and s
+  end
+
+  -- Embed the decision tree into a function hierarchy.
+  local j = 5
+  for p=88,0,-1 do
+    local pn = ok[p]
+    if pn then
+      s = format("%slocal function f%d(k)\nlocal N if b%d then return f%d(k) end k=k+1 b%d=k\n%sb%d=N end\n",
+	    s, p, p, pn, p, codetree(dtrees[j], 1, p, pn), p)
+      j = j - 1; if j == 0 then j = 10 end
+    end
+  end
+
+  -- Compile and return solver function and result getter.
+  return loadstring(s.."return f0, printresult\n", "solver")(countinit)
+end
+
+-- Generate the solver function hierarchy.
+local solver, printresult = generatesolver(tonumber(arg and arg[1]) or 10000)
+
+-- The optimizer for LuaJIT 1.1.x is not helpful here, so turn it off.
+if jit and jit.opt and jit.version_num < 10200 then jit.opt.start(0) end
+
+-- Run the solver protected to get partial results (max count or ctrl-c).
+pcall(solver, 0)
+printresult()
diff --git a/perf/LuaJIT-benches/nbody.lua b/perf/LuaJIT-benches/nbody.lua
new file mode 100644
index 00000000..e0ff8f77
--- /dev/null
+++ b/perf/LuaJIT-benches/nbody.lua
@@ -0,0 +1,119 @@
+
+local sqrt = math.sqrt
+
+local PI = 3.141592653589793
+local SOLAR_MASS = 4 * PI * PI
+local DAYS_PER_YEAR = 365.24
+local bodies = {
+  { -- Sun
+    x = 0,
+    y = 0,
+    z = 0,
+    vx = 0,
+    vy = 0,
+    vz = 0,
+    mass = SOLAR_MASS
+  },
+  { -- Jupiter
+    x = 4.84143144246472090e+00,
+    y = -1.16032004402742839e+00,
+    z = -1.03622044471123109e-01,
+    vx = 1.66007664274403694e-03 * DAYS_PER_YEAR,
+    vy = 7.69901118419740425e-03 * DAYS_PER_YEAR,
+    vz = -6.90460016972063023e-05 * DAYS_PER_YEAR,
+    mass = 9.54791938424326609e-04 * SOLAR_MASS
+  },
+  { -- Saturn
+    x = 8.34336671824457987e+00,
+    y = 4.12479856412430479e+00,
+    z = -4.03523417114321381e-01,
+    vx = -2.76742510726862411e-03 * DAYS_PER_YEAR,
+    vy = 4.99852801234917238e-03 * DAYS_PER_YEAR,
+    vz = 2.30417297573763929e-05 * DAYS_PER_YEAR,
+    mass = 2.85885980666130812e-04 * SOLAR_MASS
+  },
+  { -- Uranus
+    x = 1.28943695621391310e+01,
+    y = -1.51111514016986312e+01,
+    z = -2.23307578892655734e-01,
+    vx = 2.96460137564761618e-03 * DAYS_PER_YEAR,
+    vy = 2.37847173959480950e-03 * DAYS_PER_YEAR,
+    vz = -2.96589568540237556e-05 * DAYS_PER_YEAR,
+    mass = 4.36624404335156298e-05 * SOLAR_MASS
+  },
+  { -- Neptune
+    x = 1.53796971148509165e+01,
+    y = -2.59193146099879641e+01,
+    z = 1.79258772950371181e-01,
+    vx = 2.68067772490389322e-03 * DAYS_PER_YEAR,
+    vy = 1.62824170038242295e-03 * DAYS_PER_YEAR,
+    vz = -9.51592254519715870e-05 * DAYS_PER_YEAR,
+    mass = 5.15138902046611451e-05 * SOLAR_MASS
+  }
+}
+
+local function advance(bodies, nbody, dt)
+  for i=1,nbody do
+    local bi = bodies[i]
+    local bix, biy, biz, bimass = bi.x, bi.y, bi.z, bi.mass
+    local bivx, bivy, bivz = bi.vx, bi.vy, bi.vz
+    for j=i+1,nbody do
+      local bj = bodies[j]
+      local dx, dy, dz = bix-bj.x, biy-bj.y, biz-bj.z
+      local mag = sqrt(dx*dx + dy*dy + dz*dz)
+      mag = dt / (mag * mag * mag)
+      local bm = bj.mass*mag
+      bivx = bivx - (dx * bm)
+      bivy = bivy - (dy * bm)
+      bivz = bivz - (dz * bm)
+      bm = bimass*mag
+      bj.vx = bj.vx + (dx * bm)
+      bj.vy = bj.vy + (dy * bm)
+      bj.vz = bj.vz + (dz * bm)
+    end
+    bi.vx = bivx
+    bi.vy = bivy
+    bi.vz = bivz
+    bi.x = bix + dt * bivx
+    bi.y = biy + dt * bivy
+    bi.z = biz + dt * bivz
+  end
+end
+
+local function energy(bodies, nbody)
+  local e = 0
+  for i=1,nbody do
+    local bi = bodies[i]
+    local vx, vy, vz, bim = bi.vx, bi.vy, bi.vz, bi.mass
+    e = e + (0.5 * bim * (vx*vx + vy*vy + vz*vz))
+    for j=i+1,nbody do
+      local bj = bodies[j]
+      local dx, dy, dz = bi.x-bj.x, bi.y-bj.y, bi.z-bj.z
+      local distance = sqrt(dx*dx + dy*dy + dz*dz)
+      e = e - ((bim * bj.mass) / distance)
+    end
+  end
+  return e
+end
+
+local function offsetMomentum(b, nbody)
+  local px, py, pz = 0, 0, 0
+  for i=1,nbody do
+    local bi = b[i]
+    local bim = bi.mass
+    px = px + (bi.vx * bim)
+    py = py + (bi.vy * bim)
+    pz = pz + (bi.vz * bim)
+  end
+  b[1].vx = -px / SOLAR_MASS
+  b[1].vy = -py / SOLAR_MASS
+  b[1].vz = -pz / SOLAR_MASS
+end
+
+local N = tonumber(arg and arg[1]) or 1000
+local nbody = #bodies
+
+offsetMomentum(bodies, nbody)
+io.write( string.format("%0.9f",energy(bodies, nbody)), "\n")
+for i=1,N do advance(bodies, nbody, 0.01) end
+io.write( string.format("%0.9f",energy(bodies, nbody)), "\n")
diff --git a/perf/LuaJIT-benches/nsieve-bit-fp.lua b/perf/LuaJIT-benches/nsieve-bit-fp.lua
new file mode 100644
index 00000000..3971ec1f
--- /dev/null
+++ b/perf/LuaJIT-benches/nsieve-bit-fp.lua
@@ -0,0 +1,37 @@
+
+local floor, ceil = math.floor, math.ceil
+
+local precision = 50 -- Maximum precision of lua_Number (minus safety margin).
+local onebits = (2^precision)-1
+
+local function nsieve(p, m)
+  local cm = ceil(m/precision)
+  do local onebits = onebits; for i=0,cm do p[i] = onebits end end
+  local count, idx, bit = 0, 2, 2
+  for i=2,m do
+    local r = p[idx] / bit
+    if r - floor(r) >= 0.5 then -- Bit set?
+      local kidx, kbit = idx, bit
+      for k=i+i,m,i do
+        kidx = kidx + i
+        while kidx >= cm do kidx = kidx - cm; kbit = kbit + kbit end
+        local x = p[kidx]
+        local r = x / kbit
+        if r - floor(r) >= 0.5 then p[kidx] = x - kbit*0.5 end -- Clear bit.
+      end
+      count = count + 1
+    end
+    idx = idx + 1
+    if idx >= cm then idx = 0; bit = bit + bit end
+  end
+  return count
+end
+
+local N = tonumber(arg and arg[1]) or 1
+if N < 2 then N = 2 end
+local primes = {}
+
+for i=0,2 do
+  local m = (2^(N-i))*10000
+  io.write(string.format("Primes up to %8d %8d\n", m, nsieve(primes, m)))
+end
diff --git a/perf/LuaJIT-benches/nsieve-bit.lua b/perf/LuaJIT-benches/nsieve-bit.lua
new file mode 100644
index 00000000..820a3726
--- /dev/null
+++ b/perf/LuaJIT-benches/nsieve-bit.lua
@@ -0,0 +1,27 @@
+
+local bit = require("bit")
+local band, bxor, rshift, rol = bit.band, bit.bxor, bit.rshift, bit.rol
+
+local function nsieve(p, m)
+  local count = 0
+  for i=0,rshift(m, 5) do p[i] = -1 end
+  for i=2,m do
+    if band(rshift(p[rshift(i, 5)], i), 1) ~= 0 then
+      count = count + 1
+      for j=i+i,m,i do
+	local jx = rshift(j, 5)
+	p[jx] = band(p[jx], rol(-2, j))
+      end
+    end
+  end
+  return count
+end
+
+local N = tonumber(arg and arg[1]) or 1
+if N < 2 then N = 2 end
+local primes = {}
+
+for i=0,2 do
+  local m = (2^(N-i))*10000
+  io.write(string.format("Primes up to %8d %8d\n", m, nsieve(primes, m)))
+end
diff --git a/perf/LuaJIT-benches/nsieve.lua b/perf/LuaJIT-benches/nsieve.lua
new file mode 100644
index 00000000..6de0524f
--- /dev/null
+++ b/perf/LuaJIT-benches/nsieve.lua
@@ -0,0 +1,21 @@
+
+local function nsieve(p, m)
+  for i=2,m do p[i] = true end
+  local count = 0
+  for i=2,m do
+    if p[i] then
+      for k=i+i,m,i do p[k] = false end
+      count = count + 1
+    end
+  end
+  return count
+end
+
+local N = tonumber(arg and arg[1]) or 1
+if N < 2 then N = 2 end
+local primes = {}
+
+for i=0,2 do
+  local m = (2^(N-i))*10000
+  io.write(string.format("Primes up to %8d %8d\n", m, nsieve(primes, m)))
+end
diff --git a/perf/LuaJIT-benches/partialsums.lua b/perf/LuaJIT-benches/partialsums.lua
new file mode 100644
index 00000000..46bb9da3
--- /dev/null
+++ b/perf/LuaJIT-benches/partialsums.lua
@@ -0,0 +1,29 @@
+
+local n = tonumber(arg[1])
+local function pr(fmt, x) io.write(string.format(fmt, x)) end
+
+local a1, a2, a3, a4, a5, a6, a7, a8, a9, alt = 1, 0, 0, 0, 0, 0, 0, 0, 0, 1
+local sqrt, sin, cos = math.sqrt, math.sin, math.cos
+for k=1,n do
+  local k2, sk, ck = k*k, sin(k), cos(k)
+  local k3 = k2*k
+  a1 = a1 + (2/3)^k
+  a2 = a2 + 1/sqrt(k)
+  a3 = a3 + 1/(k2+k)
+  a4 = a4 + 1/(k3*sk*sk)
+  a5 = a5 + 1/(k3*ck*ck)
+  a6 = a6 + 1/k
+  a7 = a7 + 1/k2
+  a8 = a8 + alt/k
+  a9 = a9 + alt/(k+k-1)
+  alt = -alt
+end
+pr("%.9f\t(2/3)^k\n", a1)
+pr("%.9f\tk^-0.5\n", a2)
+pr("%.9f\t1/k(k+1)\n", a3)
+pr("%.9f\tFlint Hills\n", a4)
+pr("%.9f\tCookson Hills\n", a5)
+pr("%.9f\tHarmonic\n", a6)
+pr("%.9f\tRiemann Zeta\n", a7)
+pr("%.9f\tAlternating Harmonic\n", a8)
+pr("%.9f\tGregory\n", a9)
diff --git a/perf/LuaJIT-benches/pidigits-nogmp.lua b/perf/LuaJIT-benches/pidigits-nogmp.lua
new file mode 100644
index 00000000..63a1cb0e
--- /dev/null
+++ b/perf/LuaJIT-benches/pidigits-nogmp.lua
@@ -0,0 +1,100 @@
+
+-- Start of dynamically compiled chunk.
+local chunk = [=[
+
+-- Factory function for multi-precision number (mpn) operations.
+local function fmm(fa, fb)
+  return loadstring([[
+    return function(y, a, ka, b, kb)
+      local carry, n = 0, #a ]]..(fb == 0 and "" or [[
+      local na, nb = n, #b -- Need to adjust lengths. 1 element suffices here.
+      if na > nb then b[na] = 0 elseif na < nb then a[nb] = 0; n = nb end
+    ]])..[[
+      for i=1,n do -- Sum up all elements and propagate carry.
+        local x = a[i] ]]..(fa == 2 and "*ka" or "")..
+          (fb == 2 and "+b[i]*kb" or (fb == 1 and "+b[i]" or ""))..[[ + carry
+        if x < RADIX and x >= 0 then carry = 0; y[i] = x -- Check for overflow.
+        else local d = x % RADIX; carry = (x-d) / RADIX; y[i] = d end
+      end
+      y[n+1] = nil -- Truncate target. 1 element suffices here.
+      if carry == 0 then while n > 0 and y[n] == 0 do y[n] = nil end
+      elseif carry == -1 then y[n] = y[n] - RADIX else y[n+1] = carry end
+    ]]..(fb == 0 and "" or [[ -- Undo length adjustment.
+      if na > nb then b[na] = nil elseif na < nb and y ~= a then a[nb] = nil end
+    ]])..[[
+      return y
+    end]])()
+end
+
+-- Generate needed mpn functions.
+local mm_kk, mm_k1, mm_k0, mm_11 = fmm(2, 2), fmm(2, 1), fmm(2, 0), fmm(1, 1)
+
+-- Choose the most efficient mpn function for y = a*ka + b*kb at run-time.
+local function mm(y, a, ka, b, kb)
+  local f = mm_kk
+  if kb == 0 or #b == 0 then if ka == 1 then return a else f = mm_k0 end
+  elseif kb == 1 then if ka == 1 then f = mm_11 else f = mm_k1 end end
+  return f(y, a, ka, b, kb)
+end
+
+-- Compose matrix with numbers on the right.
+local function compose_r(aq,ar,as,at, bq,br,bs,bt)
+  mm(ar, ar,bq, at,br) mm(at, at,bt, ar,bs)
+  mm(as, as,bt, aq,bs) mm(aq, aq,bq, nil,0)
+end
+
+-- Compose matrix with numbers on the left.
+local function compose_l(aq,ar,as,at, bq,br,bs,bt)
+  mm(ar, ar,bt, aq,br) mm(at, at,bt, as,br)
+  mm(as, as,bq, at,bs) mm(aq, aq,bq, nil,0)
+end
+
+-- Extract one digit.
+local u, v, jj = {}, {}, 0
+local function extract(q,r,s,t, j)
+  local u = j == jj + 1 and mm(u, u,1, q,1) or mm(u, q,j, r,1); jj = j
+  local v = mm(v, t,1, s,j)
+  local nu, nv, y = #u, #v
+  if nu == nv then
+    if nu == 1 then y = u[1] / v[1]
+    else y = (u[nu]*RADIX + u[nu-1]) / (v[nv]*RADIX + v[nv-1]) end
+  elseif nu == nv+1 then y = (u[nu]*RADIX + u[nv]) / v[nv]
+  else return 0 end
+  return math.floor(y)
+end
+
+-- Coroutine which yields successive digits of PI.
+return coroutine.wrap(function()
+  local q, r, s, t, k = {1}, {}, {}, {1}, 1
+  repeat
+    local y = extract(q,r,s,t, 3)
+    if y == extract(q,r,s,t, 4) then
+      coroutine.yield(y)
+      compose_r(q,r,s,t,  10, -10*y, 0, 1)
+    else
+      compose_l(q,r,s,t,   k, 4*k+2, 0, 2*k+1)
+      k = k + 1
+    end
+  until false
+end)
+
+]=] -- End of dynamically compiled chunk.
+
+local N = tonumber(arg and arg[1]) or 27
+local RADIX = N < 6500 and 2^36 or 2^32 -- Avoid overflow.
+
+-- Substitute radix and compile chunk.
+local pidigit = loadstring(string.gsub(chunk, "RADIX", tostring(RADIX)))()
+
+-- Print lines with 10 digits.
+for i=10,N,10 do
+  for j=1,10 do io.write(pidigit()) end
+  io.write("\t:", i, "\n")
+end
+
+-- Print remaining digits (if any).
+local n10 = N % 10
+if n10 ~= 0 then
+  for i=1,n10 do io.write(pidigit()) end
+  io.write(string.rep(" ", 10-n10), "\t:", N, "\n")
+end
diff --git a/perf/LuaJIT-benches/ray.lua b/perf/LuaJIT-benches/ray.lua
new file mode 100644
index 00000000..2acc24c0
--- /dev/null
+++ b/perf/LuaJIT-benches/ray.lua
@@ -0,0 +1,135 @@
+local sqrt = math.sqrt
+local huge = math.huge
+
+local delta = 1
+while delta * delta + 1 ~= 1 do
+  delta = delta * 0.5
+end
+
+local function length(x, y, z)  return sqrt(x*x + y*y + z*z) end
+local function vlen(v)          return length(v[1], v[2], v[3]) end
+local function mul(c, x, y, z)  return c*x, c*y, c*z end
+local function unitise(x, y, z) return mul(1/length(x, y, z), x, y, z) end
+local function dot(x1, y1, z1, x2, y2, z2)
+  return x1*x2 + y1*y2 + z1*z2
+end
+
+local function vsub(a, b)        return a[1] - b[1], a[2] - b[2], a[3] - b[3] end
+local function vdot(a, b)        return dot(a[1], a[2], a[3], b[1], b[2], b[3]) end
+
+
+local sphere = {}
+function sphere:new(centre, radius)
+  self.__index = self
+  return setmetatable({centre=centre, radius=radius}, self)
+end
+
+local function sphere_distance(self, origin, dir)
+  local vx, vy, vz = vsub(self.centre, origin)
+  local b = dot(vx, vy, vz, dir[1], dir[2], dir[3])
+  local r = self.radius
+  local disc = r*r + b*b - vx*vx-vy*vy-vz*vz
+  if disc < 0 then return huge end
+  local d = sqrt(disc)
+  local t2 = b + d
+  if t2 < 0 then return huge end
+  local t1 = b - d
+  return t1 > 0 and t1 or t2
+end
+
+function sphere:intersect(origin, dir, best)
+  local lambda = sphere_distance(self, origin, dir)
+  if lambda < best[1] then
+    local c = self.centre
+    best[1] = lambda
+    local b2 = best[2]
+    b2[1], b2[2], b2[3] =
+      unitise(
+        origin[1] - c[1] + lambda * dir[1],
+        origin[2] - c[2] + lambda * dir[2],
+        origin[3] - c[3] + lambda * dir[3])
+  end
+end
+
+local group = {}
+function group:new(bound)
+  self.__index = self
+  return setmetatable({bound=bound, children={}}, self)
+end
+
+function group:add(s)
+  self.children[#self.children+1] = s
+end
+
+function group:intersect(origin, dir, best)
+  local lambda = sphere_distance(self.bound, origin, dir)
+  if lambda < best[1] then
+    for _, c in ipairs(self.children) do
+      c:intersect(origin, dir, best)
+    end
+  end
+end
+
+local hit = { 0, 0, 0 }
+local ilight
+local best = { huge, { 0, 0, 0 } }
+
+local function ray_trace(light, camera, dir, scene)
+  best[1] = huge
+  scene:intersect(camera, dir, best)
+  local b1 = best[1]
+  if b1 == huge then return 0 end
+  local b2 = best[2]
+  local g = vdot(b2, light)
+  if g >= 0 then return 0 end
+  hit[1] = camera[1] + b1*dir[1] + delta*b2[1]
+  hit[2] = camera[2] + b1*dir[2] + delta*b2[2]
+  hit[3] = camera[3] + b1*dir[3] + delta*b2[3]
+  best[1] = huge
+  scene:intersect(hit, ilight, best)
+  if best[1] == huge then
+    return -g
+  else
+    return 0
+  end
+end
+
+local function create(level, centre, radius)
+  local s = sphere:new(centre, radius)
+  if level == 1 then return s end
+  local gr = group:new(sphere:new(centre, 3*radius))
+  gr:add(s)
+  local rn = 3*radius/sqrt(12)
+  for dz = -1,1,2 do
+    for dx = -1,1,2 do
+      gr:add(create(level-1, { centre[1] + rn*dx, centre[2] + rn, centre[3] + rn*dz }, radius*0.5))
+    end
+  end
+  return gr
+end
+
+
+local level, n, ss = tonumber(arg[1]) or 9, tonumber(arg[2]) or 256, 4
+local iss = 1/ss
+local gf = 255/(ss*ss)
+
+io.write(("P5\n%d %d\n255\n"):format(n, n))
+local light = { unitise(-1, -3, 2) }
+ilight = { -light[1], -light[2], -light[3] }
+local camera = { 0, 0, -4 }
+local dir = { 0, 0, 0 }
+
+local scene = create(level, {0, -1, 0}, 1)
+
+for y = n/2-1, -n/2, -1 do
+  for x = -n/2, n/2-1 do
+    local g = 0
+    for d = y, y+.99, iss do
+      for e = x, x+.99, iss do
+        dir[1], dir[2], dir[3] = unitise(e, d, n)
+        g = g + ray_trace(light, camera, dir, scene) 
+      end
+    end
+    io.write(string.char(math.floor(0.5 + g*gf)))
+  end
+end
diff --git a/perf/LuaJIT-benches/recursive-ack.lua b/perf/LuaJIT-benches/recursive-ack.lua
new file mode 100644
index 00000000..fad30589
--- /dev/null
+++ b/perf/LuaJIT-benches/recursive-ack.lua
@@ -0,0 +1,8 @@
+local function Ack(m, n)
+  if m == 0 then return n+1 end
+  if n == 0 then return Ack(m-1, 1) end
+  return Ack(m-1, (Ack(m, n-1))) -- The parentheses are deliberate.
+end
+
+local N = tonumber(arg and arg[1]) or 10
+io.write("Ack(3,", N ,"): ", Ack(3,N), "\n")
diff --git a/perf/LuaJIT-benches/recursive-fib.lua b/perf/LuaJIT-benches/recursive-fib.lua
new file mode 100644
index 00000000..ef9950de
--- /dev/null
+++ b/perf/LuaJIT-benches/recursive-fib.lua
@@ -0,0 +1,7 @@
+local function fib(n)
+  if n < 2 then return 1 end
+  return fib(n-2) + fib(n-1)
+end
+
+local n = tonumber(arg[1]) or 10
+io.write(string.format("Fib(%d): %d\n", n, fib(n)))
diff --git a/perf/LuaJIT-benches/revcomp.lua b/perf/LuaJIT-benches/revcomp.lua
new file mode 100644
index 00000000..34fe347b
--- /dev/null
+++ b/perf/LuaJIT-benches/revcomp.lua
@@ -0,0 +1,37 @@
+
+local sub = string.sub
+iubc = setmetatable({
+  A="T", C="G", B="V", D="H", K="M", R="Y",
+  a="T", c="G", b="V", d="H", k="M", r="Y",
+  T="A", G="C", V="B", H="D", M="K", Y="R", U="A",
+  t="A", g="C", v="B", h="D", m="K", y="R", u="A",
+  N="N", S="S", W="W", n="N", s="S", w="W",
+}, { __index = function(t, s)
+  local r = t[sub(s, 2)]..t[sub(s, 1, 1)]; t[s] = r; return r end })
+
+local wcode = [=[
+return function(t, n)
+  if n == 1 then return end
+  local iubc, sub, write = iubc, string.sub, io.write
+  local s = table.concat(t, "", 1, n-1)
+  for i=#s-59,1,-60 do
+    write(]=]
+for i=59,3,-4 do wcode = wcode.."iubc[sub(s, i+"..(i-3)..", i+"..i..")], " end
+wcode = wcode..[=["\n")
+  end
+  local r = #s % 60
+  if r ~= 0 then
+    for i=r,1,-4 do write(iubc[sub(s, i-3 < 1 and 1 or i-3, i)]) end
+    write("\n")
+  end
+end
+]=]
+local writerev = loadstring(wcode)()
+
+local t, n = {}, 1
+for line in io.lines() do
+  local c = sub(line, 1, 1)
+  if c == ">" then writerev(t, n); io.write(line, "\n"); n = 1
+  elseif c ~= ";" then t[n] = line; n = n + 1 end
+end
+writerev(t, n)
diff --git a/perf/LuaJIT-benches/scimark-2010-12-20.lua b/perf/LuaJIT-benches/scimark-2010-12-20.lua
new file mode 100644
index 00000000..353acb7c
--- /dev/null
+++ b/perf/LuaJIT-benches/scimark-2010-12-20.lua
@@ -0,0 +1,400 @@
+------------------------------------------------------------------------------
+-- Lua SciMark (2010-12-20).
+--
+-- A literal translation of SciMark 2.0a, written in Java and C.
+-- Credits go to the original authors Roldan Pozo and Bruce Miller.
+-- See: http://math.nist.gov/scimark2/
+------------------------------------------------------------------------------
+
+local SCIMARK_VERSION = "2010-12-10"
+local SCIMARK_COPYRIGHT = "Copyright (C) 2006-2010 Mike Pall"
+
+local MIN_TIME = 2.0
+local RANDOM_SEED = 101009 -- Must be odd.
+local SIZE_SELECT = "small"
+
+local benchmarks = {
+  "FFT", "SOR", "MC", "SPARSE", "LU",
+  small = {
+    FFT		= { 1024 },
+    SOR		= { 100 },
+    MC		= { },
+    SPARSE	= { 1000, 5000 },
+    LU		= { 100 },
+  },
+  large = {
+    FFT		= { 1048576 },
+    SOR		= { 1000 },
+    MC		= { },
+    SPARSE	= { 100000, 1000000 },
+    LU		= { 1000 },
+  },
+}
+
+local abs, log, sin, floor = math.abs, math.log, math.sin, math.floor
+local pi, clock = math.pi, os.clock
+local format = string.format
+
+------------------------------------------------------------------------------
+-- Select array type: Lua tables or native (FFI) arrays
+------------------------------------------------------------------------------
+
+local darray, iarray
+
+local function array_init()
+  if jit and jit.status and jit.status() then
+    local ok, ffi = pcall(require, "ffi")
+    if ok then
+      darray = ffi.typeof("double[?]")
+      iarray = ffi.typeof("int[?]")
+      return
+    end
+  end
+  function darray(n) return {} end
+  iarray = darray
+end
+
+------------------------------------------------------------------------------
+-- This is a Lagged Fibonacci Pseudo-random Number Generator with
+-- j, k, M = 5, 17, 31. Pretty weak, but same as C/Java SciMark.
+------------------------------------------------------------------------------
+
+local rand, rand_init
+
+if jit and jit.status and jit.status() then
+  -- LJ2 has bit operations and zero-based arrays (internally).
+  local bit = require("bit")
+  local band, sar = bit.band, bit.arshift
+  function rand_init(seed)
+    local Rm, Rj, Ri = iarray(17), 16, 11
+    for i=0,16 do Rm[i] = 0 end
+    for i=16,0,-1 do
+      seed = band(seed*9069, 0x7fffffff)
+      Rm[i] = seed
+    end
+    function rand()
+      local i = band(Ri+1, sar(Ri-16, 31))
+      local j = band(Rj+1, sar(Rj-16, 31))
+      Ri, Rj = i, j
+      local k = band(Rm[i] - Rm[j], 0x7fffffff)
+      Rm[j] = k
+      return k * (1.0/2147483647.0)
+    end
+  end
+else
+  -- Better for standard Lua with one-based arrays and without bit operations.
+  function rand_init(seed)
+    local Rm, Rj = {}, 1
+    for i=1,17 do Rm[i] = 0 end
+    for i=17,1,-1 do
+      seed = (seed*9069) % (2^31)
+      Rm[i] = seed
+    end
+    function rand()
+      local j, m = Rj, Rm
+      local h = j - 5
+      if h < 1 then h = h + 17 end
+      local k = m[h] - m[j]
+      if k < 0 then k = k + 2147483647 end
+      m[j] = k
+      if j < 17 then Rj = j + 1 else Rj = 1 end
+      return k * (1.0/2147483647.0)
+    end
+  end
+end
+
+local function random_vector(n)
+  local v = darray(n+1)
+  for x=1,n do v[x] = rand() end
+  return v
+end
+
+local function random_matrix(m, n)
+  local a = {}
+  for y=1,m do
+    local v = darray(n+1)
+    a[y] = v
+    for x=1,n do v[x] = rand() end
+  end
+  return a
+end
+
+------------------------------------------------------------------------------
+-- FFT: Fast Fourier Transform.
+------------------------------------------------------------------------------
+
+local function fft_bitreverse(v, n)
+  local j = 0
+  for i=0,2*n-4,2 do
+    if i < j then
+      v[i+1], v[i+2], v[j+1], v[j+2] = v[j+1], v[j+2], v[i+1], v[i+2]
+    end
+    local k = n
+    while k <= j do j = j - k; k = k / 2 end
+    j = j + k
+  end
+end
+
+local function fft_transform(v, n, dir)
+  if n <= 1 then return end
+  fft_bitreverse(v, n)
+  local dual = 1
+  repeat
+    local dual2 = 2*dual
+    for i=1,2*n-1,2*dual2 do
+      local j = i+dual2
+      local ir, ii = v[i], v[i+1]
+      local jr, ji = v[j], v[j+1]
+      v[j], v[j+1] = ir - jr, ii - ji
+      v[i], v[i+1] = ir + jr, ii + ji
+    end
+    local theta = dir * pi / dual
+    local s, s2 = sin(theta), 2.0 * sin(theta * 0.5)^2
+    local wr, wi = 1.0, 0.0
+    for a=3,dual2-1,2 do
+      wr, wi = wr - s*wi - s2*wr, wi + s*wr - s2*wi
+      for i=a,a+2*(n-dual2),2*dual2 do
+	local j = i+dual2
+	local jr, ji = v[j], v[j+1]
+	local dr, di = wr*jr - wi*ji, wr*ji + wi*jr
+	local ir, ii = v[i], v[i+1]
+	v[j], v[j+1] = ir - dr, ii - di
+	v[i], v[i+1] = ir + dr, ii + di
+      end
+    end
+    dual = dual2
+  until dual >= n
+end
+
+function benchmarks.FFT(n)
+  local l2n = log(n)/log(2)
+  if l2n % 1 ~= 0 then
+    io.stderr:write("Error: FFT data length is not a power of 2\n")
+    os.exit(1)
+  end
+  local v = random_vector(n*2)
+  return function(cycles)
+    local norm = 1.0 / n
+    for p=1,cycles do
+      fft_transform(v, n, -1)
+      fft_transform(v, n, 1)
+      for i=1,n*2 do v[i] = v[i] * norm end
+    end
+    return ((5*n-2)*l2n + 2*(n+1)) * cycles
+  end
+end
+
+------------------------------------------------------------------------------
+-- SOR: Jacobi Successive Over-Relaxation.
+------------------------------------------------------------------------------
+
+local function sor_run(mat, m, n, cycles, omega)
+  local om4, om1 = omega*0.25, 1.0-omega
+  m = m - 1
+  n = n - 1
+  for i=1,cycles do
+    for y=2,m do
+      local v, vp, vn = mat[y], mat[y-1], mat[y+1]
+      for x=2,n do
+	v[x] = om4*((vp[x]+vn[x])+(v[x-1]+v[x+1])) + om1*v[x]
+      end
+    end
+  end
+end
+
+function benchmarks.SOR(n)
+  local mat = random_matrix(n, n)
+  return function(cycles)
+    sor_run(mat, n, n, cycles, 1.25)
+    return (n-1)*(n-1)*cycles*6
+  end
+end
+
+------------------------------------------------------------------------------
+-- MC: Monte Carlo Integration.
+------------------------------------------------------------------------------
+
+local function mc_integrate(cycles)
+  local under_curve = 0
+  local rand = rand
+  for i=1,cycles do
+    local x = rand()
+    local y = rand()
+    if x*x + y*y <= 1.0 then under_curve = under_curve + 1 end
+  end
+  return (under_curve/cycles) * 4
+end
+
+function benchmarks.MC()
+  return function(cycles)
+    local res = mc_integrate(cycles)
+    assert(math.sqrt(cycles)*math.abs(res-math.pi) < 5.0, "bad MC result")
+    return cycles * 4 -- Way off, but same as SciMark in C/Java.
+  end
+end
+
+------------------------------------------------------------------------------
+-- Sparse Matrix Multiplication.
+------------------------------------------------------------------------------
+
+local function sparse_mult(n, cycles, vy, val, row, col, vx)
+  for p=1,cycles do
+    for r=1,n do
+      local sum = 0
+      for i=row[r],row[r+1]-1 do sum = sum + vx[col[i]] * val[i] end
+      vy[r] = sum
+    end
+  end
+end
+
+function benchmarks.SPARSE(n, nz)
+  local nr = floor(nz/n)
+  local anz = nr*n
+  local vx = random_vector(n)
+  local val = random_vector(anz)
+  local vy, col, row = darray(n+1), iarray(nz+1), iarray(n+2)
+  row[1] = 1
+  for r=1,n do
+    local step = floor(r/nr)
+    if step < 1 then step = 1 end
+    local rr = row[r]
+    row[r+1] = rr+nr
+    for i=0,nr-1 do col[rr+i] = 1+i*step end
+  end
+  return function(cycles)
+    sparse_mult(n, cycles, vy, val, row, col, vx)
+    return anz*cycles*2
+  end
+end
+
+------------------------------------------------------------------------------
+-- LU: Dense Matrix Factorization.
+------------------------------------------------------------------------------
+
+local function lu_factor(a, pivot, m, n)
+  local min_m_n = m < n and m or n
+  for j=1,min_m_n do
+    local jp, t = j, abs(a[j][j])
+    for i=j+1,m do
+      local ab = abs(a[i][j])
+      if ab > t then
+	jp = i
+	t = ab
+      end
+    end
+    pivot[j] = jp
+    if a[jp][j] == 0 then error("zero pivot") end
+    if jp ~= j then a[j], a[jp] = a[jp], a[j] end
+    if j < m then
+      local recp = 1.0 / a[j][j]
+      for k=j+1,m do
+	local v = a[k]
+	v[j] = v[j] * recp
+      end
+    end
+    if j < min_m_n then
+      for i=j+1,m do
+	local vi, vj = a[i], a[j]
+	local eij = vi[j]
+	for k=j+1,n do vi[k] = vi[k] - eij * vj[k] end
+      end
+    end
+  end
+end
+
+local function matrix_alloc(m, n)
+  local a = {}
+  for y=1,m do a[y] = darray(n+1) end
+  return a
+end
+
+local function matrix_copy(dst, src, m, n)
+  for y=1,m do
+    local vd, vs = dst[y], src[y]
+    for x=1,n do vd[x] = vs[x] end
+  end
+end
+
+function benchmarks.LU(n)
+  local mat = random_matrix(n, n)
+  local tmp = matrix_alloc(n, n)
+  local pivot = iarray(n+1)
+  return function(cycles)
+    for i=1,cycles do
+      matrix_copy(tmp, mat, n, n)
+      lu_factor(tmp, pivot, n, n)
+    end
+    return 2.0/3.0*n*n*n*cycles
+  end
+end
+
+------------------------------------------------------------------------------
+-- Main program.
+------------------------------------------------------------------------------
+
+local function printf(...)
+  io.write(format(...))
+end
+
+local function fmtparams(p1, p2)
+  if p2 then return format("[%d, %d]", p1, p2)
+  elseif p1 then return format("[%d]", p1) end
+  return ""
+end
+
+local function measure(min_time, name, ...)
+  array_init()
+  rand_init(RANDOM_SEED)
+  local run = benchmarks[name](...)
+  local cycles = 1
+  repeat
+    local tm = clock()
+    local flops = run(cycles, ...)
+    tm = clock() - tm
+    if tm >= min_time then
+      local res = flops / tm * 1.0e-6
+      local p1, p2 = ...
+      printf("%-7s %8.2f  %s\n", name, res, fmtparams(...))
+      return res
+    end
+    cycles = cycles * 2
+  until false
+end
+
+printf("Lua SciMark %s based on SciMark 2.0a. %s.\n\n",
+       SCIMARK_VERSION, SCIMARK_COPYRIGHT)
+
+while arg and arg[1] do
+  local a = table.remove(arg, 1)
+  if a == "-noffi" then
+    package.preload.ffi = nil
+  elseif a == "-small" then
+    SIZE_SELECT = "small"
+  elseif a == "-large" then
+    SIZE_SELECT = "large"
+  elseif benchmarks[a] then
+    local p = benchmarks[SIZE_SELECT][a]
+    measure(MIN_TIME, a, tonumber(arg[1]) or p[1], tonumber(arg[2]) or p[2])
+    return
+  else
+    printf("Usage: scimark [-noffi] [-small|-large] [BENCH params...]\n\n")
+    printf("BENCH   -small         -large\n")
+    printf("---------------------------------------\n")
+    for _,name in ipairs(benchmarks) do
+      printf("%-7s %-13s %s\n", name,
+	     fmtparams(unpack(benchmarks.small[name])),
+	     fmtparams(unpack(benchmarks.large[name])))
+    end
+    printf("\n")
+    os.exit(1)
+  end
+end
+
+local params = benchmarks[SIZE_SELECT]
+local sum = 0
+for _,name in ipairs(benchmarks) do
+  sum = sum + measure(MIN_TIME, name, unpack(params[name]))
+end
+printf("\nSciMark %8.2f  [%s problem sizes]\n", sum / #benchmarks, SIZE_SELECT)
+io.flush()
+
diff --git a/perf/LuaJIT-benches/scimark-fft.lua b/perf/LuaJIT-benches/scimark-fft.lua
new file mode 100644
index 00000000..c05bb69a
--- /dev/null
+++ b/perf/LuaJIT-benches/scimark-fft.lua
@@ -0,0 +1 @@
+require("scimark_lib").FFT(1024)(tonumber(arg and arg[1]) or 50000)
diff --git a/perf/LuaJIT-benches/scimark-lu.lua b/perf/LuaJIT-benches/scimark-lu.lua
new file mode 100644
index 00000000..7636d994
--- /dev/null
+++ b/perf/LuaJIT-benches/scimark-lu.lua
@@ -0,0 +1 @@
+require("scimark_lib").LU(100)(tonumber(arg and arg[1]) or 5000)
diff --git a/perf/LuaJIT-benches/scimark-sor.lua b/perf/LuaJIT-benches/scimark-sor.lua
new file mode 100644
index 00000000..e537e986
--- /dev/null
+++ b/perf/LuaJIT-benches/scimark-sor.lua
@@ -0,0 +1 @@
+require("scimark_lib").SOR(100)(tonumber(arg and arg[1]) or 50000)
diff --git a/perf/LuaJIT-benches/scimark-sparse.lua b/perf/LuaJIT-benches/scimark-sparse.lua
new file mode 100644
index 00000000..01a2258d
--- /dev/null
+++ b/perf/LuaJIT-benches/scimark-sparse.lua
@@ -0,0 +1 @@
+require("scimark_lib").SPARSE(1000, 5000)(tonumber(arg and arg[1]) or 150000)
diff --git a/perf/LuaJIT-benches/scimark_lib.lua b/perf/LuaJIT-benches/scimark_lib.lua
new file mode 100644
index 00000000..aeffd75a
--- /dev/null
+++ b/perf/LuaJIT-benches/scimark_lib.lua
@@ -0,0 +1,297 @@
+------------------------------------------------------------------------------
+-- Lua SciMark (2010-03-15).
+--
+-- A literal translation of SciMark 2.0a, written in Java and C.
+-- Credits go to the original authors Roldan Pozo and Bruce Miller.
+-- See: http://math.nist.gov/scimark2/
+------------------------------------------------------------------------------
+
+
+local SCIMARK_VERSION = "2010-03-15"
+
+local RANDOM_SEED = 101009 -- Must be odd.
+
+local abs, log, sin, floor = math.abs, math.log, math.sin, math.floor
+local pi, clock = math.pi, os.clock
+
+local benchmarks = {}
+
+------------------------------------------------------------------------------
+-- This is a Lagged Fibonacci Pseudo-random Number Generator with
+-- j, k, M = 5, 17, 31. Pretty weak, but same as C/Java SciMark.
+------------------------------------------------------------------------------
+
+local rand, rand_init
+
+if jit and jit.status and jit.status() then
+  -- LJ2 has bit operations and zero-based arrays (internally).
+  local bit = require("bit")
+  local band, sar = bit.band, bit.arshift
+  local Rm, Rj, Ri = {}, 0, 0
+  for i=0,16 do Rm[i] = 0 end
+  function rand_init(seed)
+    Rj, Ri = 16, 11
+    for i=16,0,-1 do
+      seed = band(seed*9069, 0x7fffffff)
+      Rm[i] = seed
+    end
+  end
+  function rand()
+    local i = band(Ri+1, sar(Ri-16, 31))
+    local j = band(Rj+1, sar(Rj-16, 31))
+    Ri, Rj = i, j
+    local k = band(Rm[i] - Rm[j], 0x7fffffff)
+    Rm[j] = k
+    return k * (1.0/2147483647.0)
+  end
+else
+  -- Better for standard Lua with one-based arrays and without bit operations.
+  local Rm, Rj = {}, 1
+  for i=1,17 do Rm[i] = 0 end
+  function rand_init(seed)
+    Rj = 1
+    for i=17,1,-1 do
+      seed = (seed*9069) % (2^31)
+      Rm[i] = seed
+    end
+  end
+  function rand()
+    local j, m = Rj, Rm
+    local h = j - 5
+    if h < 1 then h = h + 17 end
+    local k = m[h] - m[j]
+    if k < 0 then k = k + 2147483647 end
+    m[j] = k
+    if j < 17 then Rj = j + 1 else Rj = 1 end
+    return k * (1.0/2147483647.0)
+  end
+end
+
+local function random_vector(n)
+  local v = {}
+  for x=1,n do v[x] = rand() end
+  return v
+end
+
+local function random_matrix(m, n)
+  local a = {}
+  for y=1,m do
+    local v = {}
+    a[y] = v
+    for x=1,n do v[x] = rand() end
+  end
+  return a
+end
+
+------------------------------------------------------------------------------
+-- FFT: Fast Fourier Transform.
+------------------------------------------------------------------------------
+
+local function fft_bitreverse(v, n)
+  local j = 0
+  for i=0,2*n-4,2 do
+    if i < j then
+      v[i+1], v[i+2], v[j+1], v[j+2] = v[j+1], v[j+2], v[i+1], v[i+2]
+    end
+    local k = n
+    while k <= j do j = j - k; k = k / 2 end
+    j = j + k
+  end
+end
+
+local function fft_transform(v, n, dir)
+  if n <= 1 then return end
+  fft_bitreverse(v, n)
+  local dual = 1
+  repeat
+    local dual2 = 2*dual
+    for i=1,2*n-1,2*dual2 do
+      local j = i+dual2
+      local ir, ii = v[i], v[i+1]
+      local jr, ji = v[j], v[j+1]
+      v[j], v[j+1] = ir - jr, ii - ji
+      v[i], v[i+1] = ir + jr, ii + ji
+    end
+    local theta = dir * pi / dual
+    local s, s2 = sin(theta), 2.0 * sin(theta * 0.5)^2
+    local wr, wi = 1.0, 0.0
+    for a=3,dual2-1,2 do
+      wr, wi = wr - s*wi - s2*wr, wi + s*wr - s2*wi
+      for i=a,a+2*(n-dual2),2*dual2 do
+	local j = i+dual2
+	local jr, ji = v[j], v[j+1]
+	local dr, di = wr*jr - wi*ji, wr*ji + wi*jr
+	local ir, ii = v[i], v[i+1]
+	v[j], v[j+1] = ir - dr, ii - di
+	v[i], v[i+1] = ir + dr, ii + di
+      end
+    end
+    dual = dual2
+  until dual >= n
+end
+
+function benchmarks.FFT(n)
+  local l2n = log(n)/log(2)
+  if l2n % 1 ~= 0 then
+    io.stderr:write("Error: FFT data length is not a power of 2\n")
+    os.exit(1)
+  end
+  local v = random_vector(n*2)
+  return function(cycles)
+    local norm = 1.0 / n
+    for p=1,cycles do
+      fft_transform(v, n, -1)
+      fft_transform(v, n, 1)
+      for i=1,n*2 do v[i] = v[i] * norm end
+    end
+    return ((5*n-2)*l2n + 2*(n+1)) * cycles
+  end
+end
+
+------------------------------------------------------------------------------
+-- SOR: Jacobi Successive Over-Relaxation.
+------------------------------------------------------------------------------
+
+local function sor_run(mat, m, n, cycles, omega)
+  local om4, om1 = omega*0.25, 1.0-omega
+  m = m - 1
+  n = n - 1
+  for i=1,cycles do
+    for y=2,m do
+      local v, vp, vn = mat[y], mat[y-1], mat[y+1]
+      for x=2,n do
+	v[x] = om4*((vp[x]+vn[x])+(v[x-1]+v[x+1])) + om1*v[x]
+      end
+    end
+  end
+end
+
+function benchmarks.SOR(n)
+  local mat = random_matrix(n, n)
+  return function(cycles)
+    sor_run(mat, n, n, cycles, 1.25)
+    return (n-1)*(n-1)*cycles*6
+  end
+end
+
+------------------------------------------------------------------------------
+-- MC: Monte Carlo Integration.
+------------------------------------------------------------------------------
+
+local function mc_integrate(cycles)
+  local under_curve = 0
+  local rand = rand
+  for i=1,cycles do
+    local x = rand()
+    local y = rand()
+    if x*x + y*y <= 1.0 then under_curve = under_curve + 1 end
+  end
+  return (under_curve/cycles) * 4
+end
+
+function benchmarks.MC()
+  return function(cycles)
+    local res = mc_integrate(cycles)
+    assert(math.sqrt(cycles)*math.abs(res-math.pi) < 5.0, "bad MC result")
+    return cycles * 4 -- Way off, but same as SciMark in C/Java.
+  end
+end
+
+------------------------------------------------------------------------------
+-- Sparse Matrix Multiplication.
+------------------------------------------------------------------------------
+
+local function sparse_mult(n, cycles, vy, val, row, col, vx)
+  for p=1,cycles do
+    for r=1,n do
+      local sum = 0
+      for i=row[r],row[r+1]-1 do sum = sum + vx[col[i]] * val[i] end
+      vy[r] = sum
+    end
+  end
+end
+
+function benchmarks.SPARSE(n, nz)
+  local nr = floor(nz/n)
+  local anz = nr*n
+  local vx = random_vector(n)
+  local val = random_vector(anz)
+  local vy, col, row = {}, {}, {}
+  row[1] = 1
+  for r=1,n do
+    local step = floor(r/nr)
+    if step < 1 then step = 1 end
+    local rr = row[r]
+    row[r+1] = rr+nr
+    for i=0,nr-1 do col[rr+i] = 1+i*step end
+  end
+  return function(cycles)
+    sparse_mult(n, cycles, vy, val, row, col, vx)
+    return anz*cycles*2
+  end
+end
+
+------------------------------------------------------------------------------
+-- LU: Dense Matrix Factorization.
+------------------------------------------------------------------------------
+
+local function lu_factor(a, pivot, m, n)
+  local min_m_n = m < n and m or n
+  for j=1,min_m_n do
+    local jp, t = j, abs(a[j][j])
+    for i=j+1,m do
+      local ab = abs(a[i][j])
+      if ab > t then
+	jp = i
+	t = ab
+      end
+    end
+    pivot[j] = jp
+    if a[jp][j] == 0 then error("zero pivot") end
+    if jp ~= j then a[j], a[jp] = a[jp], a[j] end
+    if j < m then
+      local recp = 1.0 / a[j][j]
+      for k=j+1,m do
+        local v = a[k]
+	v[j] = v[j] * recp
+      end
+    end
+    if j < min_m_n then
+      for i=j+1,m do
+	local vi, vj = a[i], a[j]
+	local eij = vi[j]
+	for k=j+1,n do vi[k] = vi[k] - eij * vj[k] end
+      end
+    end
+  end
+end
+
+local function matrix_alloc(m, n)
+  local a = {}
+  for y=1,m do a[y] = {} end
+  return a
+end
+
+local function matrix_copy(dst, src, m, n)
+  for y=1,m do
+    local vd, vs = dst[y], src[y]
+    for x=1,n do vd[x] = vs[x] end
+  end
+end
+
+function benchmarks.LU(n)
+  local mat = random_matrix(n, n)
+  local tmp = matrix_alloc(n, n)
+  local pivot = {}
+  return function(cycles)
+    for i=1,cycles do
+      matrix_copy(tmp, mat, n, n)
+      lu_factor(tmp, pivot, n, n)
+    end
+    return 2.0/3.0*n*n*n*cycles
+  end
+end
+
+rand_init(RANDOM_SEED)
+
+return benchmarks
diff --git a/perf/LuaJIT-benches/series.lua b/perf/LuaJIT-benches/series.lua
new file mode 100644
index 00000000..f766cb32
--- /dev/null
+++ b/perf/LuaJIT-benches/series.lua
@@ -0,0 +1,34 @@
+
+local function integrate(x0, x1, nsteps, omegan, f)
+  local x, dx = x0, (x1-x0)/nsteps
+  local rvalue = ((x0+1)^x0 * f(omegan*x0)) / 2
+  for i=3,nsteps do
+    x = x + dx
+    rvalue = rvalue + (x+1)^x * f(omegan*x)
+  end
+  return (rvalue + ((x1+1)^x1 * f(omegan*x1)) / 2) * dx
+end
+
+local function series(n)
+  local sin, cos = math.sin, math.cos
+  local omega = math.pi
+  local t = {}
+
+  t[1] = integrate(0, 2, 1000, 0, function() return 1 end) / 2
+  t[2] = 0
+
+  for i=2,n do
+    t[2*i-1] = integrate(0, 2, 1000, omega*i, cos)
+    t[2*i] = integrate(0, 2, 1000, omega*i, sin)
+  end
+
+  return t
+end
+
+local n = tonumber(arg and arg[1]) or 10000
+local tm = os.clock()
+local t = series(n)
+tm = os.clock() - tm
+assert(math.abs(t[1]-2.87295) < 0.00001)
+io.write(string.format("size %d, %.2f s, %.1f iterations/s\n",
+                       n, tm, (2*n-1)/tm))
diff --git a/perf/LuaJIT-benches/spectral-norm.lua b/perf/LuaJIT-benches/spectral-norm.lua
new file mode 100644
index 00000000..ecc80112
--- /dev/null
+++ b/perf/LuaJIT-benches/spectral-norm.lua
@@ -0,0 +1,40 @@
+
+local function A(i, j)
+  local ij = i+j-1
+  return 1.0 / (ij * (ij-1) * 0.5 + i)
+end
+
+local function Av(x, y, N)
+  for i=1,N do
+    local a = 0
+    for j=1,N do a = a + x[j] * A(i, j) end
+    y[i] = a
+  end
+end
+
+local function Atv(x, y, N)
+  for i=1,N do
+    local a = 0
+    for j=1,N do a = a + x[j] * A(j, i) end
+    y[i] = a
+  end
+end
+
+local function AtAv(x, y, t, N)
+  Av(x, t, N)
+  Atv(t, y, N)
+end
+
+local N = tonumber(arg and arg[1]) or 100
+local u, v, t = {}, {}, {}
+for i=1,N do u[i] = 1 end
+
+for i=1,10 do AtAv(u, v, t, N) AtAv(v, u, t, N) end
+
+local vBv, vv = 0, 0
+for i=1,N do
+  local ui, vi = u[i], v[i]
+  vBv = vBv + ui*vi
+  vv = vv + vi*vi
+end
+io.write(string.format("%0.9f\n", math.sqrt(vBv / vv)))
diff --git a/perf/LuaJIT-benches/sum-file.lua b/perf/LuaJIT-benches/sum-file.lua
new file mode 100644
index 00000000..c9e618fd
--- /dev/null
+++ b/perf/LuaJIT-benches/sum-file.lua
@@ -0,0 +1,6 @@
+
+local sum = 0
+for line in io.lines() do
+  sum = sum + line
+end
+io.write(sum, "\n")
-- 
2.51.0


  reply	other threads:[~2025-10-24 10:51 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-24 10:50 [Tarantool-patches] [PATCH v1 luajit 00/41] LuaJIT performance testing Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` Sergey Kaplun via Tarantool-patches [this message]
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 02/41] perf: introduce clock module Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 03/41] perf: introduce bench module Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 04/41] perf: adjust array3d in LuaJIT-benches Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 05/41] perf: adjust binary-trees " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 06/41] perf: adjust chameneos " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 07/41] perf: adjust coroutine-ring " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 08/41] perf: adjust euler14-bit " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 09/41] perf: adjust fannkuch " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 10/41] perf: adjust fasta " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 11/41] perf: adjust k-nucleotide " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 12/41] perf: adjust life " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 13/41] perf: adjust mandelbrot-bit " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 14/41] perf: adjust mandelbrot " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 15/41] perf: adjust md5 " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 16/41] perf: adjust meteor " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 17/41] perf: adjust nbody " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 18/41] perf: adjust nsieve-bit-fp " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 19/41] perf: adjust nsieve-bit " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 20/41] perf: adjust nsieve " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 21/41] perf: adjust partialsums " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 22/41] perf: adjust pidigits-nogmp " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 23/41] perf: adjust ray " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 24/41] perf: adjust recursive-ack " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 25/41] perf: adjust recursive-fib " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 26/41] perf: adjust revcomp " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 27/41] perf: adjust scimark-2010-12-20 " Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 28/41] perf: move <scimark_lib.lua> to <libs/> directory Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 29/41] perf: adjust scimark-fft in LuaJIT-benches Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 30/41] perf: adjust scimark-lu " Sergey Kaplun via Tarantool-patches
2025-10-24 11:00   ` Sergey Kaplun via Tarantool-patches
2025-10-24 11:01   ` Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 31/41] perf: add scimark-mc " Sergey Kaplun via Tarantool-patches
2025-10-24 11:00   ` Sergey Kaplun via Tarantool-patches
2025-10-24 11:02   ` Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 32/41] perf: adjust scimark-sor " Sergey Kaplun via Tarantool-patches
2025-10-24 11:00   ` Sergey Kaplun via Tarantool-patches
2025-10-24 11:02   ` Sergey Kaplun via Tarantool-patches
2025-10-24 10:50 ` [Tarantool-patches] [PATCH v1 luajit 33/41] perf: adjust scimark-sparse " Sergey Kaplun via Tarantool-patches
2025-10-24 11:00   ` Sergey Kaplun via Tarantool-patches
2025-10-24 11:03   ` Sergey Kaplun via Tarantool-patches
2025-10-24 11:00 ` [Tarantool-patches] [PATCH v1 luajit 34/41] perf: adjust series " Sergey Kaplun via Tarantool-patches
2025-10-24 11:00 ` [Tarantool-patches] [PATCH v1 luajit 35/41] perf: adjust spectral-norm " Sergey Kaplun via Tarantool-patches
2025-10-24 11:00 ` [Tarantool-patches] [PATCH v1 luajit 36/41] perf: adjust sum-file " Sergey Kaplun via Tarantool-patches
2025-10-24 11:00 ` [Tarantool-patches] [PATCH v1 luajit 37/41] perf: add CMake infrastructure Sergey Kaplun via Tarantool-patches
2025-10-24 11:00 ` [Tarantool-patches] [PATCH v1 luajit 38/41] perf: add aggregator helper for bench statistics Sergey Kaplun via Tarantool-patches
2025-10-24 11:00 ` [Tarantool-patches] [PATCH v1 luajit 39/41] perf: add a script for the environment setup Sergey Kaplun via Tarantool-patches
2025-10-24 11:00 ` [Tarantool-patches] [PATCH v1 luajit 40/41] perf: provide CMake option to setup the benchmark Sergey Kaplun via Tarantool-patches
2025-10-24 11:00 ` [Tarantool-patches] [PATCH v1 luajit 41/41] ci: introduce the performance workflow Sergey Kaplun via Tarantool-patches

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