GitHub user davies opened a pull request: https://github.com/apache/spark/pull/8833
[SPARK-10685] [SPARK-8632] [SQL] [PYSPARK] Python UDF should only compute the upstream once This PR changes to buffer the rows from upstream into a Queue, then zip them with result from Python UDF, to avoid the double computation of upstream. Thanks the idea from @rxin to simplify the buffer greatly! cc @marmbrus Closes #8662 You can merge this pull request into a Git repository by running: $ git pull https://github.com/davies/spark pyudf Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/8833.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #8833 ---- commit b98cf2a45984d24bdb181e4d43d8f83ca1849aff Author: Davies Liu <dav...@databricks.com> Date: 2015-09-19T05:42:26Z compute the upstream once ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org