[ https://issues.apache.org/jira/browse/IMPALA-4065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tianyi Wang updated IMPALA-4065: -------------------------------- Comment: was deleted (was: I observed more than 2X speed up in the TopNNode with an "order by int_col" extreme case, but not so much for the sort case in IMPALA-3816. It seems LLVM doesn't optimize the template code well if there are indirect calls among them. ) > Inline comparator calls into TopN::InsertBatch() > ------------------------------------------------ > > Key: IMPALA-4065 > URL: https://issues.apache.org/jira/browse/IMPALA-4065 > Project: IMPALA > Issue Type: Bug > Components: Backend > Affects Versions: Impala 2.7.0 > Reporter: Tim Armstrong > Assignee: Tianyi Wang > Priority: Minor > Labels: codegen, ramp-up > > This is the more interesting follow-on from IMPALA-3815. We should inline the > Compare() calls in the codegen'd TopN code to avoid the indirect function > pointer call. > The tricky aspect is that the Compare() calls are called from > std::priority_queue, and we don't have a way to force-inline those functions > at the moment. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org