Eliminate RubyClass stack based on Evan Phoenix's explorations
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Key: JRUBY-3337
URL: http://jira.codehaus.org/browse/JRUBY-3337
Project: JRuby
Issue Type: Improvement
Reporter: Charles Oliver Nutter
Assignee: Thomas E Enebo
Fix For: JRuby 1.x+
Attachments: cref_vs_class.txt
Evan Phoenix of Rubinius may have cracked the RubyClass code. He has documented
all places where it needs to be updated and where it actually differs from the
"cref" class in a document I'm attaching to this bug. Basically only evals end
up actually needing to track a different RubyClass, which means all the other
nonsense of pushing and popping RubyClass may be pure waste.
I started trying to implement this in JRuby, but ran into complications because
of JRUBY-3336, which I discovered while trying to untangle eval logic. So I
think in order to get this totally working, we need to at minimum rework the
eval logic we have currently and probably fix JRUBY-3336 as well. Given that
neither of these is a trivial task and there's a breakage potential, I'm
punting on them for now. This probably won't get into 1.2, but it may be a nice
bonus perf boost in 1.3.
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