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https://issues.apache.org/jira/browse/LUCENE-2096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir resolved LUCENE-2096.
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Resolution: Duplicate
> Investigate parallelizing Ant junit tests
> -----------------------------------------
>
> Key: LUCENE-2096
> URL: https://issues.apache.org/jira/browse/LUCENE-2096
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Build
> Reporter: Erick Erickson
> Priority: Minor
>
> Ant Contrib has a "ForEach" construct that may speed up running all of the
> Junit tests by parallelizing them with a configurable number of threads. I
> envision this in several stages. First, see if ForEach works for us with
> hard-coded lists, distribute this for testing then make the changes "for
> real". I intend to hard-code the list for the first pass, ordered by the time
> they take. This won't do for check-in, but will give us a fast
> proof-of-concept.
> This approach will be most useful for multi-core machines.
> In particular, we need to see whether the parallel tasks are isolated enough
> from each other to prevent mutual interference.
> All this assumes the fragmentary reference I found is still available...
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