GitHub user JoshRosen opened a pull request: https://github.com/apache/spark/pull/13504
[SPARK-15762][SQL] Cache Metadata.hashCode and use a singleton for Metadata.empty We should cache `Metadata.hashCode` and use a singleton for `Metadata.empty` because calculating metadata hashCodes appears to be a bottleneck for certain workloads. /cc @ericl You can merge this pull request into a Git repository by running: $ git pull https://github.com/JoshRosen/spark metadata-fix Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/13504.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 #13504 ---- commit 806160072f0744f5e700f78d5632ea237fbc6515 Author: Josh Rosen <joshro...@databricks.com> Date: 2016-06-03T21:05:26Z Cache metadata. ---- --- 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