From: SASADA Koichi <ko1@...>
Date: 2013-04-29T12:39:13+09:00
Subject: [ruby-core:54681] Re: [ruby-trunk - Feature #8339][Open] Introducing Geneartional Garbage Collection for CRuby/MRI

(2013/04/29 11:41), SASADA Koichi wrote:
> (2013/04/29 5:00), Eric Wong wrote:
>> What is the expected performance impact for short-lived scripts and
>> one-liners?  I hope there is no (or very little) regression.
> 
> Maybe it is a little (up to 10% down).
> We need more measurements.

FYI: Measurement on my environment:
http://www.atdot.net/sp/raw/e4uylm

Observation:
- Works!! :)
- SOme of benchmarks are slow down because of
  - not enough WBs to reduce GC (marking time)
  - but increase WB overheads (for Array access)
- vm3_gc speed up! , but it is mystery because
  there are no old objects and
  GC.start run full-GC.
  It seems that full-GC (== current M&S) is faster
  with my some my modification (removing mark_counter, etc).
- Computing intensive simple benchmarks are not affected.

-- 
// SASADA Koichi at atdot dot net