From: tgx_world@...
Date: 2015-02-10T12:35:15+00:00
Subject: [ruby-core:68078] [Ruby trunk - Bug #10817] [PERF] vm3_gc slower

Issue #10817 has been updated by Guo Xiang Tan.


More results ran on my local machine

### [bm_vm3.rb](https://github.com/ruby-bench/ruby-bench-suite/blob/master/ruby/benchmarks/bm_vm3_gc.rb) Benchmarks

## Ruby 2.1.5
```
raw data:

[["vm3_gc",
  [[1.781873639,
    1.783857101,
    1.785210547,
    1.765383432,
    1.782443273,
    1.772300559,
    1.781810876,
    1.775731151,
    1.790814346,
    1.779261756]]]]

Elapsed time: 17.801257535 (sec)
-----------------------------------------------------------
benchmark results:
minimum results in each 10 measurements.
Execution time (sec)
name	ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux]
Posting results to Web UI....
vm3_gc	1.765
```

## Ruby 2.2
```
raw data:

[["vm3_gc",
  [[2.3463893930002087,
    2.3218893540001773,
    2.3346126609999374,
    2.325292480999906,
    2.3357411790002516,
    2.331829299000219,
    2.3262738720000016,
    2.3313931529996808,
    2.3262657880000006,
    2.3227735149998807]]]]

Elapsed time: 23.304931506 (sec)
-----------------------------------------------------------
benchmark results:
minimum results in each 10 measurements.
Execution time (sec)
name	ruby 2.2.0p6 (2015-01-03 revision 49125) [x86_64-linux]
Posting results to Web UI....
vm3_gc	2.322
```

## `USE_RGENGC = 0`
```
raw data:

[["vm3_gc",
  [[1.5703227599997263,
    1.5682877579997694,
    1.6116582240001662,
    1.5651109710001947,
    1.552847889000077,
    1.550723786999697,
    1.5628306730000077,
    1.5581518529997993,
    1.561870511000052,
    1.5770128940002905]]]]

Elapsed time: 15.682895972 (sec)
-----------------------------------------------------------
benchmark results:
minimum results in each 10 measurements.
Execution time (sec)
name	ruby 2.2.0p6 (2015-01-03 revision 49125) [x86_64-linux]
Posting results to Web UI....
vm3_gc	1.551
```

## `USE_RINCGC = 0`
```
raw data:

[["vm3_gc",
  [[2.095197224000003,
    2.0840697899998304,
    2.1194490730003963,
    2.091287412999918,
    2.0882632130001184,
    2.0964824409998073,
    2.08875445700005,
    2.0652376550001463,
    2.072298475000025,
    2.108764761999737]]]]

Elapsed time: 20.911727736 (sec)
-----------------------------------------------------------
benchmark results:
minimum results in each 10 measurements.
Execution time (sec)
name	ruby 2.2.0p6 (2015-01-03 revision 49125) [x86_64-linux]
Posting results to Web UI....
vm3_gc	2.065
```

----------------------------------------
Bug #10817: [PERF] vm3_gc slower
https://bugs.ruby-lang.org/issues/10817#change-51462

* Author: Guo Xiang Tan
* Status: Open
* Priority: Normal
* Assignee: Koichi Sasada
* ruby -v: ruby 2.2.0dev (2014-09-07 trunk 47444)
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
----------------------------------------
http://rubybench.org/ruby/ruby/commits?result_type=vm3_gc

When running locally,
-----------------------------------------------------------
benchmark results:
Execution time (sec)
name  ruby 2.2.0dev (2014-09-07 trunk 47443) [x86_64-linux]
vm3_gc  1.946

-----------------------------------------------------------
benchmark results:
Execution time (sec)
name  ruby 2.2.0dev (2014-09-07 trunk 47444) [x86_64-linux]
vm3_gc  2.426

Tracked down to https://github.com/ruby/ruby/commit/123eeb1c1a904923754ce65148dbef045b56e083. Let me know if there is anymore information I can provide.





-- 
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