UBERJAR Plugin for Maven B8 and Performance

[Siegfried Göschl <si...@it20one.at>]

Hi folks,

I had a look at the UBERJAR plugin to drop the javaapp plugin and I 
really like the design of  UBERJAR.

But it is too slow - my JAR is about 11.5 MByte and starting it takes 
now 150 seconds instead of 3 seconds. After loading all the classes 
there is still a performance degration of the factor 5 - my tests 
runs now in 19.5 sec instead of 3.8 seconds.

Is there a chance to improve the performance of an UBERJAR 
application dramatically?!


Thanks in advance,

Siegfried Goeschl

Re: UBERJAR Plugin for Maven B8 and Performance

[Jason van Zyl <ja...@zenplex.com>]

On Sun, 2003-03-16 at 12:31, Pete Kazmier wrote:
> >>>>> On Fri, 14 Mar 2003 15:27:33 -0500 (EST), bob mcwhirter said:
> 
> bob> Jason van Zyl and James Taylor have been doing performance
> bob> optimizations on the uberjar, but I don't think it's all be
> bob> hooked up into the uberjar plugin.  We need to do some more
> bob> testing and push new classworlds jars to the repo, I think.
> 
> I've been eagerly awaiting the new optimizations jason and jt have
> been doing so I can bump up the version of the classworlds dep in the
> uberjar plugin.  In my own repo, I've been using a beta version of the
> classworlds with jt's patches and startup is much quicker.

I think the only route we could go, short of rewriting the entire
URLClassLoader, is to provide a tool in Maven that indexes the JAR prior
to use. We could make ClassWorlds aware of this index: A small table
with offsets to the class bytes so they can be loaded quickly to avoid
having to index the JAR before use which isn't a workable solution. I
tried it with Maven and it choked. I just find it unbelievable that the
Sun folks never considered this use case. Why am I not surprised :-)

> -Pete
> 
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-- 
jvz.

Jason van Zyl
jason@zenplex.com
http://tambora.zenplex.org

In short, man creates for himself a new religion of a rational
and technical order to justify his work and to be justified in it.
  
  -- Jacques Ellul, The Technological Society

Re: UBERJAR Plugin for Maven B8 and Performance

[Pete Kazmier <pe...@kazmier.com>]

>>>>> On Fri, 14 Mar 2003 15:27:33 -0500 (EST), bob mcwhirter said:

bob> Jason van Zyl and James Taylor have been doing performance
bob> optimizations on the uberjar, but I don't think it's all be
bob> hooked up into the uberjar plugin.  We need to do some more
bob> testing and push new classworlds jars to the repo, I think.

I've been eagerly awaiting the new optimizations jason and jt have
been doing so I can bump up the version of the classworlds dep in the
uberjar plugin.  In my own repo, I've been using a beta version of the
classworlds with jt's patches and startup is much quicker.

-Pete

Re: UBERJAR Plugin for Maven B8 and Performance

[bob mcwhirter <bo...@werken.com>]

> Is there a chance to improve the performance of an UBERJAR 
> application dramatically?!

Jason van Zyl and James Taylor have been doing performance
optimizations on the uberjar, but I don't think it's all be
hooked up into the uberjar plugin.  We need to do some more
testing and push new classworlds jars to the repo, I think.

	-bob