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Aloha Ruby Conf 2012: Message in a Bottle
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Konstantin Haase
October 10, 2012
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Aloha Ruby Conf 2012: Message in a Bottle
Konstantin Haase
October 10, 2012
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Transcript
MESSAGE IN A BOTTLE Konstantin Haase Aloha Ruby Conference October
8, 2012
Ruby 1.8 is slow because it's interpreted.
Surprise! Ruby 1.9 is interpreted, too.
THANKS
@konstantinhaase (I’m sorry about that) rkh on github
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WWAPD
Ruby
Internals
Performance
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RubyMotion rupypy
WHAT WE’LL LOOK INTO MRI: method dispatch and execution Rubinius:
inline caches and JIT JRuby: invokedynamic
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THEY JUST LOVE BYTECODE
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MRI
Rubinius
JRuby (JVM 1.6)
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Source Code Parser Parse Tree Interpreter Bytecode Compiler Bytecode Interpreter
JIT Machine Code CPU VM
THE PLAN Find Method Execute Method
Performance
HOW TO SPEED UP? Find Method Faster Execute Method Faster
FIND FASTER Inline Cache (aka Call/ Send Site Cache) Lookup
Cache Inlining
EXECUTE FASTER Reduce operations Just-in-time compilation Speed up search
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rb_method_entry rb_method_entry_without_cache search_method
None
None
None
None
None
None
Module MethodTable Bucket CompiledCode
None
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InlineCache MachineCode CompiledCode initial_backend execute_backend cache_[cTrackedICHits] execute empty_cache ...
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SPECIALIZED METHODS cached bytecode code with breakpoints specialized for arguments
JITed code
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None
None
None
None
Process invokedynamic JVM method bootstrap guard fallback
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Reducing CPU instructions Reducing jumps Not breaking late binding
caching inlining JITing guards
FAST LOOKUP FAST EXECUTION
THANKS