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https://issues.apache.org/jira/browse/LUCENE-1709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724720#action_12724720
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Johan Kindgren commented on LUCENE-1709:
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I did a quick maven setup just to see the effects of running tests in parallel,
and the result was a bit surprising. When running in parallel, it took about
30-40 seconds less (~7.40minutes) than running in sequence (~8.10minutes).
Don't know if there would be a significant boost on a quad-core, my dual core
had some idle time left when running with five threads.
Is it worth the development time and the complexity increase of the build?
> Parallelize Tests
> -----------------
>
> Key: LUCENE-1709
> URL: https://issues.apache.org/jira/browse/LUCENE-1709
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.4.1
> Reporter: Jason Rutherglen
> Fix For: 3.0
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> The Lucene tests can be parallelized to make for a faster testing system.
> This task from ANT can be used:
> http://ant.apache.org/manual/CoreTasks/parallel.html
> Previous discussion:
> http://www.gossamer-threads.com/lists/lucene/java-dev/69669
> Notes from Mike M.:
> {quote}
> I'd love to see a clean solution here (the tests are embarrassingly
> parallelizable, and we all have machines with good concurrency these
> days)... I have a rather hacked up solution now, that uses
> "-Dtestpackage=XXX" to split the tests up.
> Ideally I would be able to say "use N threads" and it'd do the right
> thing... like the -j flag to make.
> {quote}
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