Re: [PhillyOnRails] Ruby in a JVM

["Jason Yates" <jaywhy@gmail.com>]

> I'd be surprised if JRuby ran faster than regular Ruby, but I suppose
> it's possible.  If speed interests you, you might want to investigate
> YARV.  It just got merged into the Ruby trunk, so it'll be awhile
> before it's production.  But it promises some major speed increases
> (up to 11.7x in some cases):
> http://www.rubychan.de/share/yarv_speedups.html

I'd also be suprised.  My understanding is you cannot use the JVM's
method dispatching without static typing.  So you'd have to emulate
via software, hence slowing it down.  Plus the JVM has very little
support for modifying code at runtime.   Even something like accessing
instance variables in JRuby would be slower.  In Java the instance
variables are known at compile time.  In Ruby this isn't the case.
Nor does the JVM support closures or mixins.

YARV does look promising though.  There is also some talk of using
Strongtalk, a Smalltalk VM, for Ruby also.  Which looks pretty
promising.

http://www.strongtalk.org/

--
Jason Yates
jaywhy@gmail.com
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