JRuby

JRuby 1.7 non-indy constant lookup performance has degraded

Details

  • Type: Bug Bug
  • Status: Open Open
  • Priority: Blocker Blocker
  • Resolution: Unresolved
  • Affects Version/s: JRuby 1.7.0.pre1
  • Fix Version/s: JRuby 1.7.4
  • Component/s: Compiler
  • Labels:
    None
  • Number of attachments :
    0

Description

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:

                                   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)

JRuby 1.7 on Java 6:

                                   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)

Activity

People

  • Assignee:
    Unassigned
    Reporter:
    Charles Oliver Nutter
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Dates

  • Created:
    Updated: