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0978-Fix-performance-degradation-for-many-items...
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File 0978-Fix-performance-degradation-for-many-items-in-proces.patch of Package erlang
From c13cfc0711f5cbe2fc93c14be37810cbca8c2347 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org> Date: Wed, 23 Sep 2020 10:28:49 +0200 Subject: [PATCH] Fix performance degradation for many items in process dictionary Modern versions of Clang emit a warning that the array size calculation in erl_process_dict.c is wrong. Only half of the array would be used. That would lead to a performance degradation if many items were stored in the process dictionary. --- erts/emulator/beam/erl_process_dict.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/erts/emulator/beam/erl_process_dict.c b/erts/emulator/beam/erl_process_dict.c index 64ee483079..248da52db5 100644 --- a/erts/emulator/beam/erl_process_dict.c +++ b/erts/emulator/beam/erl_process_dict.c @@ -1052,7 +1052,7 @@ static unsigned int next_array_size(unsigned int need) 1342177280UL, 2684354560UL }; - int hi = sizeof(tab) / sizeof(Uint) - 1; + int hi = sizeof(tab) / sizeof(tab[0]) - 1; int lo = 1; int cur = 4; -- 2.26.2
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