From: Roger Pack <rogerpack2005@...>
Date: 2009-04-11T13:28:24+09:00
Subject: Re: Python on LLVM


> It's probably also worth pointing out that the majority of Ruby
> application performance problems are due to the core classes, object
> churn, and GC overhead, none of which are easy to improve with a better
> compiler or execution engine. JRuby's had much better execution
> performance than CRuby for well over a year, but only recently are we
> comfortably faster at running applications like Rails. That's largely
> because it takes a lot longer to optimize all the core classes,
> certainly longer than optimizing execution.

Interesting.  Now that you mention it, I do remember seeing a comparison 
of django and django + psyco before (similar to [1]) and it didn't speed 
up more than 50%.
Still take what you can get I suppose.  That's still a 50% speedup :)


> It's also unclear whether Psyco or Unladen Swallow actually help
> application performance; in both cases they usually post perf numbers on
> execution-bound microbenchmarks. When the bulk of your application's
> time is spent manipulating Strings or Arrays, faster code execution can
> only help so much.
> 
> - Charlie

[1] 
http://www.alrond.com/en/2007/jan/25/performance-test-of-6-leading-frameworks/
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