[#64703] Add `Hash#fetch_at` (issue #10017) — Wojtek Mach <wojtek@...>
Hey guys
1 message
2014/09/01
[#64711] [ruby-trunk - Bug #10193] [Closed] TestIO#test_readpartial_locktmp fails randomly — nobu@...
Issue #10193 has been updated by Nobuyoshi Nakada.
3 messages
2014/09/02
[#64744] [ruby-trunk - Bug #10202] [Open] TestBenchmark#test_realtime_output breaks on ARM — v.ondruch@...
Issue #10202 has been reported by Vit Ondruch.
3 messages
2014/09/03
[#64823] documenting constants — Xavier Noria <fxn@...>
I am writing a Rails guide about constant autoloading in Ruby on
5 messages
2014/09/07
[#64838] [ruby-trunk - Bug #10212] [Open] MRI is not for lambda calculus — ko1@...
Issue #10212 has been reported by Koichi Sasada.
6 messages
2014/09/08
[#64858] Re: [ruby-trunk - Bug #10212] [Open] MRI is not for lambda calculus
— Eric Wong <normalperson@...>
2014/09/08
rb_env_t may use a flexible array, helps a little even on my busy system:
[#64871] Re: [ruby-trunk - Bug #10212] [Open] MRI is not for lambda calculus
— SASADA Koichi <ko1@...>
2014/09/08
(2014/09/08 19:48), Eric Wong wrote:
[#64972] [ruby-trunk - Bug #10231] [Open] Process.detach(pid) defines new singleton classes every call — headius@...
Issue #10231 has been reported by Charles Nutter.
3 messages
2014/09/11
[#64980] [ruby-trunk - Bug #10212] MRI is not for lambda calculus — ko1@...
Issue #10212 has been updated by Koichi Sasada.
4 messages
2014/09/12
[#65142] [ruby-trunk - Feature #10267] [Open] Number of processors — akr@...
Issue #10267 has been reported by Akira Tanaka.
4 messages
2014/09/20
[#65144] Re: [ruby-trunk - Feature #10267] [Open] Number of processors
— Eric Wong <normalperson@...>
2014/09/20
akr@fsij.org wrote:
[#65210] [ruby-trunk - misc #10278] [Assigned] [RFC] st.c: use ccan linked list — nobu@...
Issue #10278 has been updated by Nobuyoshi Nakada.
3 messages
2014/09/22
[ruby-core:64849] Re: [ruby-trunk - Bug #10212] [Open] MRI is not for lambda calculus
From:
Eric Wong <normalperson@...>
Date:
2014-09-08 08:56:01 UTC
List:
ruby-core #64849
ko1@atdot.net wrote:
> I haven't dig details, but maybe it is because of GC perforamance.
> Because Proc (and Env) objects are wb-unprotected, such objects are
> marked on every minor GC.
Right, perf says lots of calloc/free.
Micro-optimization:
I wonder if calloc/ZALLOC costs for zero-ing small objects in
TypedData_Make_Struct ends up being measurable sometimes.
We often overwrite most of the object immediately in the case of
rb_proc_t.
> This problem is not critical because MRI is not for lambda calculus :p
> but we can improve about it.
More micro-optimization:
I notice a lot of YARV mark/free functions do:
if (ptr) { ... }
(e.g. proc_mark/proc_free)
Maybe tiny branching + icache overheads add up for common cases where
data->ptr is always valid. I'll see if it's measurable once I figure
out Bug #10206.