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https://issues.apache.org/jira/browse/IMPALA-4065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16498711#comment-16498711
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Tianyi Wang commented on IMPALA-4065:
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Why do we need to force inline std::priority_queue? Isn't removing the function
pointer good enough?
> 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: Zoram Thanga
> 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.
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