Cache symbols in compiler (w/ patch)
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Key: JRUBY-1494
URL: http://jira.codehaus.org/browse/JRUBY-1494
Project: JRuby
Issue Type: Improvement
Reporter: Peter Brant
Assignee: Thomas E Enebo
Attachments: symbol_cache.patch
I saw a commit message from Bill that noted that caching symbols in compiled
code would speed up symbol access a lot. It seemed straightforward to do so
I've done it. It improves the performance of bench_symbol.rb by about a factor
of three.
MRI:
{noformat}
C:\eclipseWorkspaceQT\jruby_trunk\test\bench>ruby bench_symbol.rb
Control: 100k loops accessing a local symbol 100 times
0.080000 0.000000 0.080000 ( 0.080000)
0.070000 0.000000 0.070000 ( 0.071000)
0.070000 0.000000 0.070000 ( 0.080000)
0.080000 0.000000 0.080000 ( 0.080000)
0.070000 0.000000 0.070000 ( 0.070000)
0.081000 0.000000 0.081000 ( 0.080000)
0.070000 0.000000 0.070000 ( 0.070000)
0.080000 0.000000 0.080000 ( 0.080000)
0.070000 0.000000 0.070000 ( 0.070000)
0.070000 0.000000 0.070000 ( 0.070000)
{noformat}
Interpreter:
{noformat}
C:\eclipseWorkspaceQT\jruby_trunk\test\bench>..\..\bin\jruby bench_symbol.rb
Control: 100k loops accessing a local symbol 100 times
1.693000 0.000000 1.693000 ( 1.693000)
1.582000 0.000000 1.582000 ( 1.582000)
1.592000 0.000000 1.592000 ( 1.592000)
1.573000 0.000000 1.573000 ( 1.573000)
1.582000 0.000000 1.582000 ( 1.582000)
1.582000 0.000000 1.582000 ( 1.582000)
1.583000 0.000000 1.583000 ( 1.583000)
1.592000 0.000000 1.592000 ( 1.592000)
1.592000 0.000000 1.592000 ( 1.592000)
1.602000 0.000000 1.602000 ( 1.602000)
{noformat}
Compiled before:
{noformat}
C:\eclipseWorkspaceQT\jruby_trunk\test\bench>..\..\bin\jruby -C bench_symbol.rb
Control: 100k loops accessing a local symbol 100 times
0.711000 0.000000 0.711000 ( 0.701000)
0.451000 0.000000 0.451000 ( 0.451000)
0.411000 0.000000 0.411000 ( 0.411000)
0.420000 0.000000 0.420000 ( 0.420000)
0.421000 0.000000 0.421000 ( 0.411000)
0.410000 0.000000 0.410000 ( 0.410000)
0.411000 0.000000 0.411000 ( 0.411000)
0.411000 0.000000 0.411000 ( 0.411000)
0.420000 0.000000 0.420000 ( 0.420000)
0.411000 0.000000 0.411000 ( 0.411000)
{noformat}
Compiled after:
{noformat}
C:\eclipseWorkspaceQT\jruby_trunk\test\bench>..\..\bin\jruby -C bench_symbol.rb
Control: 100k loops accessing a local symbol 100 times
0.441000 0.000000 0.441000 ( 0.441000)
0.220000 0.000000 0.220000 ( 0.220000)
0.140000 0.000000 0.140000 ( 0.140000)
0.141000 0.000000 0.141000 ( 0.141000)
0.150000 0.000000 0.150000 ( 0.150000)
0.140000 0.000000 0.140000 ( 0.140000)
0.150000 0.000000 0.150000 ( 0.150000)
0.161000 0.000000 0.161000 ( 0.161000)
0.140000 0.000000 0.140000 ( 0.140000)
0.140000 0.000000 0.140000 ( 0.140000)
{noformat}
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