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From "Erick Erickson (JIRA)" <>
Subject [jira] Created: (LUCENE-2096) Investigate parallelizing Ant junit tests
Date Fri, 27 Nov 2009 20:39:20 GMT
Investigate parallelizing Ant junit tests

                 Key: LUCENE-2096
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Build
            Reporter: Erick Erickson
            Assignee: 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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