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Last active February 5, 2020 11:00
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JRuby cache classes cheat sheet
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gistfile1.txt
Branch: jit_irscope_removal
Primary flag: -Xcompile.cache.classes
* Cache precompiled scripts to ~/.ir
* Pass -X+C to get loads to precompile
Logging: -Xcompile.cache.classes.logging
Put ~/.ir in CLASSPATH or jar up contents to load them. logging flag will show they're loading
AppCDS flags:
* -XX:ArchiveClassesAtExit=blah.jsa to save CDS archive
* -XX:SharedArchiveFile=blah.jsa to use it
OpenJ9 flags:
* -Xquickstart to reduce optimizations (client mode sort-of)
* -Xshareclasses[:name=something] to cache (and reuse) metadata and JIT output
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