From: normalperson@...
Date: 2015-01-17T03:17:28+00:00
Subject: [ruby-core:67646] [ruby-trunk - Bug #10723] [PERF]	bm_tread_create_join 20% slower

Issue #10723 has been updated by Eric Wong.


 Minor micro-optimization, I could not find much improvement while
 keeping functionality:
 
 http://80x24.org/spew/m/thread-microopt-v1%40r49282.txt
 
 target 0: 2.1.5 (ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux]) at "/home/ew/ruby-2.1/bin/ruby"
 target 1: trunk (ruby 2.3.0dev (2015-01-16 trunk 49282) [x86_64-linux]) at "/home/ew/rrrr/b/i/bin/ruby"
 target 2: built (ruby 2.3.0dev (2015-01-16 trunk 49282) [x86_64-linux]) at "/home/ew/ruby/b/i/bin/ruby"
 
 2.1.5	1.0573025540215895
 2.1.5	1.0493981029139832
 2.1.5	1.0576379200210795
 trunk	1.2876477020327002
 trunk	1.2424484699731693
 trunk	1.2432217099703848
 built	1.1531978889834136
 built	1.137529328931123
 built	1.1509092160267755
 
 Elapsed time: 10.381246521 (sec)
 -----------------------------------------------------------
 benchmark results:
 minimum results in each 3 measurements.
 Execution time (sec)
 name	2.1.5	trunk	built
 vm_thread_create_join	1.049	1.242	1.138
 
 Speedup ratio: compare with the result of `2.1.5' (greater is better)
 name	trunk	built
 vm_thread_create_join	0.845	0.923

----------------------------------------
Bug #10723: [PERF] bm_tread_create_join 20% slower
https://bugs.ruby-lang.org/issues/10723#change-51066

* Author: Guo Xiang Tan
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.0dev (2014-09-21 trunk 47676)
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
----------------------------------------
Relevant commits: https://github.com/ruby/ruby/compare/39fd4a8...5697b2f

Chart showing the regression: http://rubybench.org/ruby/ruby/commits?result_type=vm_thread_create_join

For those unable to view the chart, the benchmark results have increased from 1.74~ seconds to 2.1~ seconds.





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