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http://jira.codehaus.org/browse/MNG-3004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=195045#action_195045
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Nicolas Frenay commented on MNG-3004:
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I agree with Hans-Peter Störr idea.
If someone is able to attack this problem now, it could be done in a way that
it's only available if you're offline. When the thread-safe issue is fixed,
this new feature will be ready to go.
It also gives extra-time to test performance with parallelization, as it will
probably require some "tweaking". Configurable maximum number of threads comes
to my mind.
> Allow build lifecycle to execute tasks in parallel
> --------------------------------------------------
>
> Key: MNG-3004
> URL: http://jira.codehaus.org/browse/MNG-3004
> Project: Maven 2
> Issue Type: Improvement
> Components: Bootstrap & Build, General, Performance
> Affects Versions: 2.0.6
> Reporter: Nigel Magnay
> Fix For: 2.3.x
>
> Attachments: parallel-builds.patch
>
>
> One of the great advantages with maven over scripted build environments is
> that it can calculate the dependencies of the build, and it could execute
> items that are independent of each other in parallel.
> Unfortunately it currently doesn't do this, which would be a big win over
> tools such as 'ant'. It also means that multicore machines have lots of idle
> capacity when running a serial build that could be utilised.
> I had a quick shot at seeing what might be required. Bear in mind this is the
> first time I have looked at maven internally, and I was just trying to feel
> my way around and build a POC. I got some of the way there, but my build
> threads don't seem to have the correct classpath - I think this is something
> to do with plexus / classworlds - but I don't know enough.
> It'd be great to get this feature in a future version, or a way of running my
> hack (figuring out why in a thread has not the plexus stuff) in the interim.
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