[ https://issues.apache.org/jira/browse/HIVE-17417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16151027#comment-16151027 ]
Sergey Shelukhin commented on HIVE-17417: ----------------------------------------- +1 pending tests > LazySimple Timestamp and Date serialization is very expensive > ------------------------------------------------------------- > > Key: HIVE-17417 > URL: https://issues.apache.org/jira/browse/HIVE-17417 > Project: Hive > Issue Type: Bug > Components: Serializers/Deserializers > Affects Versions: 3.0.0, 2.4.0 > Reporter: Prasanth Jayachandran > Assignee: Prasanth Jayachandran > Priority: Critical > Attachments: date-serialize.png, HIVE-17417.1.patch, > timestamp-serialize.png, ts-jmh-perf.png > > > In a specific case where a schema contains array<struct> with timestamp and > date fields (array size >10000). Any access to this column very very > expensive in terms of CPU as most of the time is serialization of timestamp > and date. Refer attached profiles. >70% time spent in serialization + > tostring conversions. -- This message was sent by Atlassian JIRA (v6.4.14#64029)