statement "nil.whatever rescue nil" results in building of stack trace
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Key: JRUBY-2915
URL: http://jira.codehaus.org/browse/JRUBY-2915
Project: JRuby
Issue Type: Improvement
Components: Performance
Affects Versions: JRuby 1.1.3
Environment: Any
Reporter: Greg Fodor
Priority: Minor
Performing the statement "nil.whatever rescue nil" results in JRuby building a
full stringified stack trace in memory despite the fact that the exception
object is never captured. I will update this bug report later with a thread
dump to confirm this but we were noticing this as a bottleneck in our code due
to a JDBC driver relying upon a rescue nil to perform normally.
I'd imagine the thread dump should be generated only if there is a
corresponding node indicating the exception will be caught and manipulated, or
the stack trace needs to be built more lazily?
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