From: Narihiro Nakamura <authorNari@...>
Date: 2011-07-20T19:09:06+09:00
Subject: [ruby-core:38253] [Ruby 1.9 - Feature #5033] PATCH: 1.9: gc_mark_children: Avoid gc_mark() tail recursion, use goto again.


Issue #5033 has been updated by Narihiro Nakamura.


Hi,

Kurt  Stephens wrote:
> Minor GC improvement.
> 
> Avoid recurring into gc_mark() when "goto again;" is sufficient.
> 
> -- KAS

Nice try!

I read your patch.
In some program, GC is improved.

$ cat r.rb
GC::Profiler.enable
x = ["s"]
10_000_000.times do
  x[0] = x.dup
end
p GC::Profiler.total_time

origin: 0.28999999999999976
KAS's patch: 0.22999999999999993

I will accept this patch if GC performance is decrased in other programs.
----------------------------------------
Feature #5033: PATCH: 1.9: gc_mark_children: Avoid gc_mark() tail recursion, use goto again.
http://redmine.ruby-lang.org/issues/5033

Author: Kurt  Stephens
Status: Assigned
Priority: Normal
Assignee: Narihiro Nakamura
Category: core
Target version: 1.9.x


Minor GC improvement.

Avoid recurring into gc_mark() when "goto again;" is sufficient.

-- KAS



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