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by jordanthoms 4219 days ago
Truffle can reach faster performance in pure-ruby than MRI+cext. Agreed though, it'll be a uphill battle to change the interpreter of choice, and JRuby will have to have much faster startup to get it to work
1 comments
chrisseaton 4219 days ago
We're working on an AOT compiled build of JRuby Truffle that has no dependency on the JVM and starts about as fast as MRI, but it's not public yet.
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jordanthoms 4218 days ago
That's awesome - so it'll have a JVM of sorts bundled within it but that's totally hidden, it runs just like MRI? How does memory usage compare - running JRuby on a 512mb dyno would be sweet.

What you + the jruby team is doing is truly awesome, at some point I'll have to try my hand at contributing to it :)

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chrisseaton 4217 days ago
Yeah, but it's not just bundled - to me that it sounds like we just link against a JVM library to produce a binary. What we do is to compile the Ruby interpreter, the JIT compiler and the JVM runtime in one big step - whole program analysis.

Memory usage and startup time are comparable to MRI - http://www.oracle.com/technetwork/java/jvmls2013wimmer-20140... see slide 19.

If you want to contribute there are beginner bugs (admittedly you need to be a fairly confident beginner) at https://github.com/jruby/jruby/issues?q=is%3Aopen+is%3Aissue....

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