ASF GitHub Bot commented on ARROW-2071:

pitrou commented on issue #1550: [WIP] ARROW-2071: [Python] Lighten 
serialization tests
URL: https://github.com/apache/arrow/pull/1550#issuecomment-362678335
   Ok, we're down to:
   39.21s call     
   21.64s call     
   compared to (before):
   236.05s call     
   38.78s call     
   It still don't understand what makes those tests so long in the first place. 

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> [Python] Reduce runtime of builds in Travis CI
> ----------------------------------------------
>                 Key: ARROW-2071
>                 URL: https://issues.apache.org/jira/browse/ARROW-2071
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Python
>            Reporter: Wes McKinney
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 0.9.0
> For some reason, recently each Python build has been taking about 15 minutes 
> to run. I speculate this is due to VM thrashing caused by reduced resources 
> on the Travis CI workers, related to the problem I fixed in ARROW-2062.
> We should experiment, but it seems like perhaps this can be fixed either by:
> * Reducing the size of the Plasma store on Travis CI
> * Disabling valgrind in Plasma tests
> The slowness could be caused by something else, though, so we should 
> investigate (and have pytest report slow tests in the logs)

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