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Navis commented on HIVE-8188: ----------------------------- [~prasanth_j] The original patch didn't used annotation, but a reviewer wanted that to be an annotation. So I've just replaced instanceOf to isEstimable(), not thinking deeper. Thing had done like that. Still my bad. > 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)