Charles Oliver Nutter created JRUBY-6312:
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Summary: JRuby 1.7 non-indy constant lookup performance has
degraded
Key: JRUBY-6312
URL: https://jira.codehaus.org/browse/JRUBY-6312
Project: JRuby
Issue Type: Bug
Components: Compiler
Affects Versions: JRuby 1.7
Reporter: Charles Oliver Nutter
I'm not sure the reason for this, but using the benchmark from JRUBY-6276, it
appears that non-invokedynamic constant lookup performance on Java 6 has
degrade in JRuby 1.7. We need to look into this before release, since it
appears to be as much as 2x slower.
JRuby 1.7 on Java 7:
{noformat}
user system total real
bar1 A in super: 5.473000 0.000000 5.473000 ( 5.473000)
bar2 A in super: 5.363000 0.000000 5.363000 ( 5.363000)
bar1 C: 6.091000 0.000000 6.091000 ( 6.091000)
bar2 C: 5.952000 0.000000 5.952000 ( 5.952000)
bar1 I: 6.875000 0.000000 6.875000 ( 6.875000)
bar2 I: 7.184000 0.000000 7.184000 ( 7.185000)
{noformat}
JRuby 1.7 on Java 6:
{noformat}
user system total real
bar1 A in super: 7.951000 0.000000 7.951000 ( 7.951000)
bar2 A in super: 8.416000 0.000000 8.416000 ( 8.416000)
bar1 C: 11.433000 0.000000 11.433000 ( 11.433000)
bar2 C: 12.246000 0.000000 12.246000 ( 12.246000)
bar1 I: 22.286000 0.000000 22.286000 ( 22.286000)
bar2 I: 23.562000 0.000000 23.562000 ( 23.562000)
{noformat}
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