From: Brent Roman <brent@...>
Date: 2008-12-06T10:42:24+09:00
Subject: [ruby-core:20397] Re: Leave my open classes alone (was  Behavior: autoload calls rb_require()  directly)


Charlie,

I skimmed the article.  John's obviously a smart guy.  I hope
he gets a chance implement his headless objects.

Sun's JVM has grown into a truly impressive piece of work and
I do believe it well continue to get better.  However,
it's also grown quite large and remains tied to the Intel x86
and SPARC CPUs.

Is there anyone running a recent version of 
JRuby on an ARM or MIPS CPU with an open source JVM?

If I could find a way to run JRUBY on my targets, I'd be all
over it.

- brent


Charles Oliver Nutter-2 wrote:
> 
> 
> There's a lot of interest in adding value types and tagged numerics to 
> the JVM, and I believe some work has already started on it. Currently 
> JRuby doesn't even have tagged Fixnums, though the speed of allocation 
> and young gen GC on the JVM makes up for it (we're still comfortably 
> faster than 1.9 on numeric benchmarks). However long term we'll need 
> them to really show full-speed arithmetic on the JVM, and since several 
> languages have said the same thing, they're likely to be added.
> 
> Here's an article by John Rose, one of the folks responsible for 
> 
> Hotspot's optimizing JIT:
> 
> http://blogs.sun.com/jrose/entry/fixnums_in_the_vm
> 
> As with all features, John never makes it sound particularly difficult 
> to add. By this time next year, the JVM may have fixnums, fast dynamic 
> dispatch, tail calls, continuations, value types/tuples, interface 
> injection, and a whole lot more.
> 
> - Charlie
> 
> 
> 

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