Investigate ways to reduce the cost of RubyProc.call wrt block cloning
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Key: JRUBY-3463
URL: http://jira.codehaus.org/browse/JRUBY-3463
Project: JRuby
Issue Type: Bug
Components: Performance
Reporter: Charles Oliver Nutter
Fix For: JRuby 1.3
For JRUBY-3451 I had to revert a performance fix that impacted calling procs
across threads. There's a performance degradation, because it will now have to
clone the source block for every call, but I could not see a simple way to fix
it in the short term.
A few ideas:
* Save the original thread ID, so that we only clone when called from another
thread
* Save one binding and lock against it when calling, but if other threads
encounter it locked they use a cloned copy instead. This would be a more
general fix, but would also introduce locking cost to every call.
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