[ https://issues.apache.org/jira/browse/SPARK-12950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Davies Liu updated SPARK-12950: ------------------------------- Assignee: (was: Davies Liu) > Improve performance of BytesToBytesMap > -------------------------------------- > > Key: SPARK-12950 > URL: https://issues.apache.org/jira/browse/SPARK-12950 > Project: Spark > Issue Type: Improvement > Components: SQL > Reporter: Davies Liu > > When benchmark generated aggregate with grouping keys, the profiling show > that lookup in BytesToBytesMap took about 90% of the CPU time, we should > optimize it. > After profiling with jvisualvm, here are the things that take most of the > time: > 1. decode address from Long to baseObject and offset > 2. calculate hash code > 3. compare the bytes (equality check) -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org