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A comment on Lua vs Ruby benchmarks (similarly "high-level" languages, insanely different performance). Parent comment

Re:Lua vs Ruby benchmarks (similarly "high-level" languages,... by jim-greer on Friday January 30, 2009 @04:36PM (#458741)
JRuby is not a JIT for Ruby, and it doesn't compile Ruby to Java bytecode. It's a Ruby interpreter, written in Java.
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Re:Lua vs Ruby benchmarks (similarly "high-level" languages,... by cschneid on Friday January 30, 2009 @06:32PM (#458915)
Recent work in JRuby does exactly that. It'll JIT your code, and you an even pre-compile if you want.

(AFAIK, just seen references to all this).

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Re:Lua vs Ruby benchmarks (similarly "high-level" languages,... by jim-greer on Saturday January 31, 2009 @04:19PM (#460063)
Cool! Looks like it's been around for over a year:

http://wiki.jruby.org/wiki/JRuby_Compiler

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