Re: I need to share how to improve maven's performance

2010-08-19 Thread Jason van Zyl
Sweet. We can look at the various platforms and see if we can apply this option 
across the board. Even if it's only for linux we can add it there.

On Aug 19, 2010, at 9:06 AM, kristian wrote:

> hi,
> 
> since I found out how to improve performance of maven3 significantly
> on my linux box, I thought I need to share this:
> 
> just set
> $ export MAVEN_OPTS=-client
> 
> see a little "benchmark"
> http://gist.github.com/538194
> 
> the improvement remains even for longer maven runs.
> 
> regards, Kristian
> 
> -
> To unsubscribe, e-mail: users-unsubscr...@maven.apache.org
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> 

Thanks,

Jason

--
Jason van Zyl
Founder,  Apache Maven
http://twitter.com/jvanzyl
-

A language that doesn’t affect the way you think about programming is not worth 
knowing. 
 
 -— Alan Perlis





Re: I need to share how to improve maven's performance

2010-08-21 Thread Hervé BOUTEMY
here are some explanations: [1] and [2]

[1] 
http://www.oracle.com/technetwork/java/hotspotfaq-138619.html#compiler_default

[2] http://www.oracle.com/technetwork/java/ergo5-140223.html

Le jeudi 19 août 2010, Jason van Zyl a écrit :
> Sweet. We can look at the various platforms and see if we can apply this
> option across the board. Even if it's only for linux we can add it there.
> 
> On Aug 19, 2010, at 9:06 AM, kristian wrote:
> > hi,
> > 
> > since I found out how to improve performance of maven3 significantly
> > on my linux box, I thought I need to share this:
> > 
> > just set
> > $ export MAVEN_OPTS=-client
> > 
> > see a little "benchmark"
> > http://gist.github.com/538194
> > 
> > the improvement remains even for longer maven runs.
> > 
> > regards, Kristian
> > 
> > -
> > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org
> > For additional commands, e-mail: users-h...@maven.apache.org
> 
> Thanks,
> 
> Jason
> 
> --
> Jason van Zyl
> Founder,  Apache Maven
> http://twitter.com/jvanzyl
> -
> 
> A language that doesn’t affect the way you think about programming is not
> worth knowing.
> 
>  -— Alan Perlis


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Re: I need to share how to improve maven's performance

2010-08-23 Thread rpomeroy


Jason van Zyl-2 wrote:
> 
> Sweet. We can look at the various platforms and see if we can apply this
> option across the board. Even if it's only for linux we can add it there.
> 
> On Aug 19, 2010, at 9:06 AM, kristian wrote:
> 
>> hi,
> snip...
> 

So can someone explain exactly what this flag is doing? 

Regards,

Ron
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Re: I need to share how to improve maven's performance

2010-08-23 Thread Baptiste MATHUS
To sum up:

   - Maven's JVM under 32-bits windows is not concerned. Hotspot always
   defaults to client vm under Windows.
   - Then for Linux or other platforms, with current typical machines, it's
   very often defaulting to Server VM.
   But it can vary, and is precisely explained in the link Hervé put (more
   directly, see here :
   
http://www.oracle.com/technetwork/java/ergo5-140223.html#0.0.%20Garbage%20collector,%20heap,%20and%20runtime%20compiler%7Coutline
   ).

For the record, I just checked on my 32-bits windows box, and there's no
difference between the two executions.

Hope this helps.

Cheers

2010/8/21 Hervé BOUTEMY 

> here are some explanations: [1] and [2]
>
> [1]
>
> http://www.oracle.com/technetwork/java/hotspotfaq-138619.html#compiler_default
>
> [2] http://www.oracle.com/technetwork/java/ergo5-140223.html
>
> Le jeudi 19 août 2010, Jason van Zyl a écrit :
> > Sweet. We can look at the various platforms and see if we can apply this
> > option across the board. Even if it's only for linux we can add it there.
> >
> > On Aug 19, 2010, at 9:06 AM, kristian wrote:
> > > hi,
> > >
> > > since I found out how to improve performance of maven3 significantly
> > > on my linux box, I thought I need to share this:
> > >
> > > just set
> > > $ export MAVEN_OPTS=-client
> > >
> > > see a little "benchmark"
> > > http://gist.github.com/538194
> > >
> > > the improvement remains even for longer maven runs.
> > >
> > > regards, Kristian
> > >
> > > -
> > > To unsubscribe, e-mail: users-unsubscr...@maven.apache.org
> > > For additional commands, e-mail: users-h...@maven.apache.org
> >
> > Thanks,
> >
> > Jason
> >
> > --
> > Jason van Zyl
> > Founder,  Apache Maven
> > http://twitter.com/jvanzyl
> > -
> >
> > A language that doesn’t affect the way you think about programming is not
> > worth knowing.
> >
> >  -— Alan Perlis
>
>
> -
> To unsubscribe, e-mail: users-unsubscr...@maven.apache.org
> For additional commands, e-mail: users-h...@maven.apache.org
>
>


-- 
Baptiste  MATHUS - http://batmat.net
Sauvez un arbre,
Mangez un castor !


Re: I need to share how to improve maven's performance

2010-08-23 Thread Martin Schayna

On 08/23/2010 10:55 AM, Baptiste MATHUS wrote:

- Then for Linux or other platforms, with current typical machines, it's
very often defaulting to Server VM.
But it can vary, and is precisely explained in the link Hervé put (more
directly, see here :

http://www.oracle.com/technetwork/java/ergo5-140223.html#0.0.%20Garbage%20collector,%20heap,%20and%20runtime%20compiler%7Coutline
).
   


This describes -client/-server defaults for Java version 1.4.2 only, it 
may change across newer versions. In fact I didn't google it for Java6, 
but there is a small note on Wikipedia for Java7:


Allow the virtual machine to use both the Client and Server compilers in 
the same session with a technique called Tiered compilation:
* The Client would be used at startup (because it is good at 
startup and for small applications),
* The Server would be used for long-term running of the application 
(because it outperforms the Client compiler for this).


http://en.wikipedia.org/wiki/Java_performance#Future_improvements

Martin Schayna


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Re: I need to share how to improve maven's performance

2010-08-23 Thread kristian
have a look at  some tips how to improve startup time for jruby and
some of it holds true for maven as well:

http://blog.headius.com/2010/03/jruby-startup-time-tips.html

with regards, Kristian

2010/8/23 Martin Schayna :
> On 08/23/2010 10:55 AM, Baptiste MATHUS wrote:
>>
>>    - Then for Linux or other platforms, with current typical machines,
>> it's
>>    very often defaulting to Server VM.
>>    But it can vary, and is precisely explained in the link Hervé put (more
>>    directly, see here :
>>
>>  http://www.oracle.com/technetwork/java/ergo5-140223.html#0.0.%20Garbage%20collector,%20heap,%20and%20runtime%20compiler%7Coutline
>>    ).
>>
>
> This describes -client/-server defaults for Java version 1.4.2 only, it may
> change across newer versions. In fact I didn't google it for Java6, but
> there is a small note on Wikipedia for Java7:
>
> Allow the virtual machine to use both the Client and Server compilers in the
> same session with a technique called Tiered compilation:
>    * The Client would be used at startup (because it is good at startup and
> for small applications),
>    * The Server would be used for long-term running of the application
> (because it outperforms the Client compiler for this).
>
> http://en.wikipedia.org/wiki/Java_performance#Future_improvements
>
> Martin Schayna
>
>
> -
> To unsubscribe, e-mail: users-unsubscr...@maven.apache.org
> For additional commands, e-mail: users-h...@maven.apache.org
>
>

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