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From: Vladislav Shpilevoy via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: tarantool-patches@dev.tarantool.org, olegrok@tarantool.org,
	yaroslav.dynnikov@tarantool.org
Subject: Re: [Tarantool-patches] [PATCH 9/9] util: introduce binary heap data structure
Date: Fri, 5 Mar 2021 23:03:52 +0100
Message-ID: <446bae55-fec7-9439-7bec-5d33f2c60d0c@tarantool.org> (raw)
In-Reply-To: <259e9595aefe7a28af13eb6dd336ea8f145c2112.1612914070.git.v.shpilevoy@tarantool.org>

Applied this diff and force-pushed, in order to eliminate the
metatable and __index access.

Besides, each heap's metatable is different from the others
because the methods are closures, so there wouldn't be any
memory saving from using a metatable. It couldn't have been
shared between the heaps anyway.

====================
diff --git a/vshard/heap.lua b/vshard/heap.lua
index 78c600a..b125921 100644
--- a/vshard/heap.lua
+++ b/vshard/heap.lua
@@ -203,22 +203,21 @@ local function heap_new(is_left_above)
         return count
     end
 
-    return setmetatable({
+    return {
         -- Expose the data. For testing.
         data = data,
-    }, {
-        __index = {
-            push = heap_push,
-            update_top = heap_update_top,
-            remove_top = heap_remove_top,
-            pop = heap_pop,
-            update = heap_update,
-            remove = heap_remove,
-            remove_try = heap_remove_try,
-            top = heap_top,
-            count = heap_count,
-        }
-    })
+        -- Methods are exported as members instead of __index so as to save on
+        -- not taking a metatable and going through __index on each method call.
+        push = heap_push,
+        update_top = heap_update_top,
+        remove_top = heap_remove_top,
+        pop = heap_pop,
+        update = heap_update,
+        remove = heap_remove,
+        remove_try = heap_remove_try,
+        top = heap_top,
+        count = heap_count,
+    }
 end
 
 return {

  parent reply	other threads:[~2021-03-05 22:03 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-09 23:46 [Tarantool-patches] [PATCH 0/9] VShard Map-Reduce, part 1, preparations Vladislav Shpilevoy via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 1/9] rlist: move rlist to a new module Vladislav Shpilevoy via Tarantool-patches
2021-02-10  8:57   ` Oleg Babin via Tarantool-patches
2021-02-11  6:50     ` Oleg Babin via Tarantool-patches
2021-02-12  0:09       ` Vladislav Shpilevoy via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 2/9] Use fiber.clock() instead of .time() everywhere Vladislav Shpilevoy via Tarantool-patches
2021-02-10  8:57   ` Oleg Babin via Tarantool-patches
2021-02-10 22:33     ` Vladislav Shpilevoy via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 3/9] test: introduce a helper to wait for bucket GC Vladislav Shpilevoy via Tarantool-patches
2021-02-10  8:57   ` Oleg Babin via Tarantool-patches
2021-02-10 22:33     ` Vladislav Shpilevoy via Tarantool-patches
2021-02-11  6:50       ` Oleg Babin via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 4/9] storage: bucket_recv() should check rs lock Vladislav Shpilevoy via Tarantool-patches
2021-02-10  8:59   ` Oleg Babin via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 5/9] util: introduce yielding table functions Vladislav Shpilevoy via Tarantool-patches
2021-02-10  8:59   ` Oleg Babin via Tarantool-patches
2021-02-10 22:34     ` Vladislav Shpilevoy via Tarantool-patches
2021-02-11  6:50       ` Oleg Babin via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 6/9] cfg: introduce 'deprecated option' feature Vladislav Shpilevoy via Tarantool-patches
2021-02-10  8:59   ` Oleg Babin via Tarantool-patches
2021-02-10 22:34     ` Vladislav Shpilevoy via Tarantool-patches
2021-02-11  6:50       ` Oleg Babin via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 7/9] gc: introduce reactive garbage collector Vladislav Shpilevoy via Tarantool-patches
2021-02-10  9:00   ` Oleg Babin via Tarantool-patches
2021-02-10 22:35     ` Vladislav Shpilevoy via Tarantool-patches
2021-02-11  6:50       ` Oleg Babin via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 8/9] recovery: introduce reactive recovery Vladislav Shpilevoy via Tarantool-patches
2021-02-10  9:00   ` Oleg Babin via Tarantool-patches
2021-02-09 23:46 ` [Tarantool-patches] [PATCH 9/9] util: introduce binary heap data structure Vladislav Shpilevoy via Tarantool-patches
2021-02-10  9:01   ` Oleg Babin via Tarantool-patches
2021-02-10 22:36     ` Vladislav Shpilevoy via Tarantool-patches
2021-02-11  6:51       ` Oleg Babin via Tarantool-patches
2021-02-12  0:09         ` Vladislav Shpilevoy via Tarantool-patches
2021-03-05 22:03   ` Vladislav Shpilevoy via Tarantool-patches [this message]
2021-02-09 23:51 ` [Tarantool-patches] [PATCH 0/9] VShard Map-Reduce, part 1, preparations Vladislav Shpilevoy via Tarantool-patches
2021-02-12 11:02   ` Oleg Babin via Tarantool-patches

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