Ruby Lugdunum 2012: Message in a Bottle

1. MESSAGE IN A BOTTLE Konstantin Haase Ruby Lugdunum June 23, 2012
2. @konstantinhaase (I’m sorry about that) rkh on github
3. Sinatra Rack, Tilt, Rubinius, ...
10. Ruby 1.8 is slow because it's interpreted.
11. Surprise! Ruby 1.9 is interpreted, too.
12. THANKS
13. Ruby
14. Internals
15. Performance
17. RubyMotion
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
47. SPECIALIZED METHODS cached bytecode code with breakpoints specialized for arguments JITed code
55. Process invokedynamic JVM method bootstrap guard fallback
57. THANKS