[ https://issues.apache.org/jira/browse/HIVE-8188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14148581#comment-14148581 ]
Gopal V commented on HIVE-8188: ------------------------------- [~navis]: No worries, took a special benchmark run to catch this. I'm trying to catch anything that looks like a .14 regression before the RC goes out - the UDF that hit this case was the NOW() UDF patch. > ExprNodeGenericFuncEvaluator::_evaluate() loads class annotations in a tight > loop > --------------------------------------------------------------------------------- > > Key: HIVE-8188 > URL: https://issues.apache.org/jira/browse/HIVE-8188 > Project: Hive > Issue Type: Bug > Components: UDF > Affects Versions: 0.14.0 > Reporter: Gopal V > Assignee: Gopal V > Labels: Performance > Fix For: 0.14.0 > > Attachments: HIVE-8188.1.patch, HIVE-8188.2.patch, > udf-deterministic.png > > > When running a near-constant UDF, most of the CPU is burnt within the VM > trying to read the class annotations for every row. > !udf-deterministic.png! -- This message was sent by Atlassian JIRA (v6.3.4#6332)