Gopal V created HIVE-11406: ------------------------------ Summary: Vectorization: StringExpr::compare() == 0 is bad for performance Key: HIVE-11406 URL: https://issues.apache.org/jira/browse/HIVE-11406 Project: Hive Issue Type: Bug Components: Vectorization Affects Versions: 1.3.0, 2.0.0 Reporter: Gopal V Assignee: Gopal V
{{StringExpr::compare() == 0}} is forced to evaluate the whole memory comparison loop for differing lengths of strings, though there is no possibility they will ever be equal. Add a {{StringExpr::equals}} which can be a smaller and tighter loop. -- This message was sent by Atlassian JIRA (v6.3.4#6332)