[Tarantool-patches] [PATCH v2 luajit 36/41] perf: adjust sum-file in LuaJIT-benches

[Sergey Kaplun]

This patch adjusts the aforementioned test to use the benchmark
framework introduced before. The default arguments are adjusted
according to the <PARAM_x86.txt> file. The arguments to the script still
can be provided in the command line run.

The input for the test is redirected from the generated file
<SUMCOL_5000.txt>. This file is the result of concatenation of the
<SUMCOL_1.txt> 5000 times.
---
 perf/LuaJIT-benches/sum-file.lua | 33 +++++++++++++++++++++++++++-----
 1 file changed, 28 insertions(+), 5 deletions(-)

diff --git a/perf/LuaJIT-benches/sum-file.lua b/perf/LuaJIT-benches/sum-file.lua
index c9e618fd..6af2b4a5 100644
--- a/perf/LuaJIT-benches/sum-file.lua
+++ b/perf/LuaJIT-benches/sum-file.lua
@@ -1,6 +1,29 @@
+-- The benchmark to check the performance of reading lines from
+-- stdin and sum the given numbers (the strings converted to
+-- numbers by the VM automatically).
 
-local sum = 0
-for line in io.lines() do
-  sum = sum + line
-end
-io.write(sum, "\n")
+local bench = require("bench").new(arg)
+
+-- XXX: The input file is generated from <SUMCOL_1.txt> by
+-- repeating it 5000 times. The <SUMCOL_1.txt> contains 1000 lines
+-- with the total sum of 500.
+bench:add({
+  name = "sum_file",
+  payload = function()
+    local sum = 0
+    for line in io.lines() do
+      sum = sum + line
+    end
+    -- Allow several iterations.
+    io.stdin:seek("set", 0)
+    return sum
+  end,
+  checker = function(res)
+    -- Precomputed result.
+    return res == 2500000
+  end,
+  -- Fixed size of the file.
+  items = 5e6,
+})
+
+bench:run_and_report()
-- 
2.52.0