Improve FileStat performance using a java-heap allocated structure
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Key: JRUBY-2299
URL: http://jira.codehaus.org/browse/JRUBY-2299
Project: JRuby
Issue Type: Improvement
Components: Extensions
Affects Versions: JRuby 1.1RC2
Environment: MacOS
Reporter: Wayne Meissner
Priority: Trivial
Fix For: JRuby 1.1+
Attachments: jruby+HeapStruct.patch
By changing the way native structures are allocated/read/written, you can boost
FileStat performance by a good bit - on MacOS 10.4 with java 1.5, by about 300%.
The attached patch is a cut-down quick&dirty hack of some jffi code to use
heap-allocated structures instead of native-memory allocated structures for
simple cases where that will work ok (e.g. stat(2), fstat(2)).
Its really only a proof-of-concept, and needs cleaning up by someone, but I
thought it was worth putting in an issue in case someone has time to look at it.
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