Boxed variable compilation could use lighter-weight scopes
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Key: JRUBY-1603
URL: http://jira.codehaus.org/browse/JRUBY-1603
Project: JRuby
Issue Type: Bug
Components: Compiler
Reporter: Charles Oliver Nutter
Assignee: Charles Oliver Nutter
Priority: Minor
Fix For: JRuby 1.1
When a scope contains no boxed variables, but the boxed variable compiler is
being used, it may be a perf win to use a lighter-weight scope than
DynamicScope. DynamicScope is already lazily allocating the variable array it
contains, but it could be made lighter by eliminating all references used for
variable management. This could make some method bodies with no captures
variables faster to execute, since they'd have less per-call overhead.
Also, as part of this fix, boxed variable scopes with no captured variables
could skip the initialize-all-vars-to-nil for the DynamicScope they're using.
This would eliminate that init cost for those methods.
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