Projects, which use JSR292

[Jochen Theodorou]

Am 15.02.2011 15:50, schrieb Kirill Shirokov:
> Hi All,
>
> Oracle will make an one-day conference called "Java Tech Day" in St.
> Petersburg, Russia. There will be a section called "ask the experts" for
> a number of JDK7 features including JSR 292. I'm asked to be a live
> emulator of JSR292 expert there.
>
> I expect that people will ask about "real" projects where JSR292 is
> used, so I'm trying to gather information about these projects on this list.
> So far, I have heard of:
>
> - JRuby by Charles Oliver Nutter
> - PHP.reboot by Remi Forax
> - Smalltalk implementation by Mark Roos (in progress)
>
> Sorry, if I missed somebody.
>
> And the main question to early adopters: is JSR292 really helping
> you:
> simplifies and clarifies your code, do you expect performance
> improvements over the "old" code as soon as this will be addressed in
> HotSpot?

None of the JSR292 parts is in Groovy now, but we intend to make heavy 
use of it if the JVM allows it. What we target with this is for example 
that we no longer have to generate call sites at runtime. This is stress 
on permgen and not every garbage collector behaves as it should in my 
eyes. Another part that promises to be useful is ClassValue. We would in 
fact need a InstanceValue, but it will help already avoiding some big 
internal structures, that tend to cause problems. As for performance... 
I think it can help here if the inlining really works. In the end it 
very much depends on finding good guards here, which is part of the 
process for Groovy 1.8, even though Groovy 1.8 will not yet make use of 
JSR292. Since 1.8.0 will be release soon Groovy 1.9 will most probably 
make use of JSR292.

bye Jochen

-- 
Jochen "blackdrag" Theodorou
The Groovy Project Tech Lead
http://blackdragsview.blogspot.com/
For Groovy programming sources visit http://groovy.codehaus.org