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https://issues.apache.org/jira/browse/SPARK-922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14159284#comment-14159284
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Josh Rosen commented on SPARK-922:
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I chatted with someone who had a job that ran ~20x slower on Python 2.6 than on
2.7, likely due to changes to the json library (in 2.7+, json is implemented as
a C extension rather than in pure-Python). Maybe we should add a note on this
to the docs.
> Update Spark AMI to Python 2.7
> ------------------------------
>
> Key: SPARK-922
> URL: https://issues.apache.org/jira/browse/SPARK-922
> Project: Spark
> Issue Type: Task
> Components: EC2, PySpark
> Affects Versions: 0.9.0, 0.9.1, 1.0.0
> Reporter: Josh Rosen
> Fix For: 1.2.0
>
>
> Many Python libraries only support Python 2.7+, so we should make Python 2.7
> the default Python on the Spark AMIs.
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