Rados¥Ê£Âw Bu¥Ê£Ât wrote:
> On Sat, Feb 28, 2009 at 10:16 PM, Charles Oliver Nutter
> <charles.nutter / sun.com> wrote:
>> * Ruby execution performance (how fast do you want it?)
> 
> JRuby is very fast in micro benchmark but it doesn't run so well rails
> (at least last time I checked it). Maybe you can investigate more what
> hangs jruby in rails from running at the same level as jruby vs MRI
> 1.8 in micro benchmark?

I'm hopeful that we've solved that. There are lingering issues that keep 
AR from being faster than MRI (a major one is the lack of unix sockets 
for JDBC, which does help keep MRI ahead), but for some internal 
benchmarks we've run we're finally looking like 10-20% faster for most 
things. And of course as applications get more complex and have more 
user code, we pull away due to faster core classes and execution speed.

But of course we're interested in user stories to know where to focus 
Rails-related perf work in the future.

- Charlie