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https://issues.apache.org/jira/browse/ARROW-2266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16714922#comment-16714922
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Uwe L. Korn commented on ARROW-2266:
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Is this really the part taking a lot of time? Download speeds are not that fast
in Travis so a docker image might not always be helpful (but I guess probably
worth it).
> [CI] Improve runtime of integration tests in Travis CI
> ------------------------------------------------------
>
> Key: ARROW-2266
> URL: https://issues.apache.org/jira/browse/ARROW-2266
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Continuous Integration, Integration
> Reporter: Wes McKinney
> Priority: Major
>
> I was surprised to see that travis_script_integration.sh is taking over 25
> minutes to run (https://travis-ci.org/apache/arrow/jobs/349493491). My only
> real guess about what's going on is that JVM startup time on these hosts is
> super slow.
> I can think of some things we could do to make things better:
> * Add debugging output so we can see what's slow
> * Write a Java integration test handler that validates multiple files at once
> * Generate a single set of binary files for each producer rather than
> regenerating them each time (so Java would only need to produce binary files
> once instead of 3 times like now)
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