[jruby-dev] [jira] (JRUBY-6749) respond_to? caching disabled in 1.9 mode due to respond_to_missing? logic

[Charles Oliver Nutter (JIRA)]

Charles Oliver Nutter created JRUBY-6749 respond_to? caching disabled in 1.9 mode due to respond_to_missing? logic Issue Type: Bug Affects Versions: JRuby 1.7.0.pre2 Assignee: Unassigned Components: Core Classes/Modules, Ruby 1.9.3 Created: 27/Jun/12 2:04 PM Description: For JRUBY-6740, I had to disable caching of respond_to? results in RespondToCallSite, since the requirement to do respond_to_missing? calls on false results from the builtin respond_to? caused problems with user-defined respond_to? methods. We should try to fix this and get it enabled again. Low priority, since it doesn't affect functionality, but it means respond_to? calls from Ruby code are slower now than 1.8 mode. 1.9 mode: user system total real control, 1 and :to_ary 0.060000 0.000000 0.060000 ( 0.051000) 1m 1.respond_to?(:to_ary) 0.120000 0.000000 0.120000 ( 0.116000) 1m 1.respond_to?(:to_ary,true) 0.110000 0.000000 0.110000 ( 0.111000) 1m 1.respond_to?(:next) 0.080000 0.000000 0.080000 ( 0.081000) 1m redefined obj.respond_to? 0.070000 0.010000 0.080000 ( 0.064000) 1m varying name respond_to? 0.060000 0.000000 0.060000 ( 0.066000) 1.8 mode: user system total real control, 1 and :to_ary 0.040000 0.000000 0.040000 ( 0.039000) 1m 1.respond_to?(:to_ary) 0.040000 0.000000 0.040000 ( 0.044000) 1m 1.respond_to?(:to_ary,true) 0.050000 0.000000 0.050000 ( 0.045000) 1m 1.respond_to?(:next) 0.040000 0.000000 0.040000 ( 0.044000) 1m redefined obj.respond_to? 0.050000 0.000000 0.050000 ( 0.050000) 1m varying name respond_to? 0.060000 0.000000 0.060000 ( 0.052000) Note that invokedynamic logic does not do (has never done) any respond_to? magic right now, and performance is about the same as uncached non-indy logic. Fix Versions: JRuby 1.7.0 Project: JRuby Priority: Major Reporter: Charles Oliver Nutter

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