Aloha Ruby Conf 2012: Message in a Bottle

Transcript

1. MESSAGE IN A BOTTLE Konstantin Haase Aloha Ruby Conference October 8, 2012
2. Ruby 1.8 is slow because it's interpreted.
3. Surprise! Ruby 1.9 is interpreted, too.
4. THANKS
5. @konstantinhaase (I’m sorry about that) rkh on github
12. WWAPD
13. Ruby
14. Internals
15. Performance
17. RubyMotion rupypy
18. WHAT WE’LL LOOK INTO MRI: method dispatch and execution Rubinius: inline caches and JIT JRuby: invokedynamic
20. THEY JUST LOVE BYTECODE
22. MRI
23. Rubinius
24. JRuby (JVM 1.6)
26. Source Code Parser Parse Tree Interpreter Bytecode Compiler Bytecode Interpreter JIT Machine Code CPU VM
27. THE PLAN Find Method Execute Method
28. Performance
29. HOW TO SPEED UP? Find Method Faster Execute Method Faster
30. FIND FASTER Inline Cache (aka Call/ Send Site Cache) Lookup Cache Inlining
31. EXECUTE FASTER Reduce operations Just-in-time compilation Speed up search
33. rb_method_entry rb_method_entry_without_cache search_method
40. Module MethodTable Bucket CompiledCode
45. InlineCache MachineCode CompiledCode initial_backend execute_backend cache_[cTrackedICHits] execute empty_cache ...
47. SPECIALIZED METHODS cached bytecode code with breakpoints specialized for arguments JITed code
55. Process invokedynamic JVM method bootstrap guard fallback
57. Reducing CPU instructions Reducing jumps Not breaking late binding
58. caching inlining JITing guards
59. FAST LOOKUP FAST EXECUTION
60. THANKS