[hibernate-dev] Why cglib was replaced with javassist?

[Steve Ebersole]

Its more than just inactivity.  As projects mature you expect some
inactivity; its just the nature of the beast.  What was more the issue
was our attempts to contact the developers going unanswered.  We tried
for over a year to contact the CGLIB developers about this need for a
release and got no response at all.  That's when this decision was made.

See this JIRA case and its links for the history here:
http://opensource.atlassian.com/projects/hibernate/browse/HHH-2222

You might also want to check out
http://opensource.atlassian.com/projects/hibernate/browse/HHH-3832
which is the upgrade to the since released CGLIB 2.2


On Fri, 2009-05-29 at 08:32 -0700, Nikita Tovstoles wrote:
> Concern over CGLIB's inactivity is certainly valid. However, our internal load-testing of javassist (a few months back) revealed that the library's perf characteristics aren't quite ready for prime time. In some cases, our system performed 2x faster with cglib v. javassist. I don't recall the exact reason why, but possibly this was due to excess synchronization in javassist code (I could be wrong about this though).
> 
> -nikita
> 
> -----Original Message-----
> From: hibernate-dev-bounces at lists.jboss.org [mailto:hibernate-dev-bounces at lists.jboss.org] On Behalf Of Chris Bredesen
> Sent: Friday, May 29, 2009 7:30 AM
> To: hibernate-dev at lists.jboss.org
> Subject: Re: [hibernate-dev] Why cglib was replaced with javassist?
> 
> First result from a search in JIRA reveals this....
> 
> http://opensource.atlassian.com/projects/hibernate/browse/HHH-2506
> 
> So I think that's your answer :)
> 
> -CB
> 
> Unmesh joshi wrote:
> > hi,
> > 
> > Till hibernate 3.2 cglib was default bytecode provider. why was it 
> > changed to javassist?
> > 
> > thanks,
> > unmesh
> > 
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-- 
Steve Ebersole <steve at hibernate.org>
Hibernate.org