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Posted to issues@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2018/07/11 17:00:00 UTC

[jira] [Resolved] (IMPALA-3262) Investigate Codegen Performance

     [ https://issues.apache.org/jira/browse/IMPALA-3262?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-3262.
-----------------------------------
    Resolution: Duplicate

I think this is more-or-less redundant with IMPALA-3262. The bulk of codegen time is spent in optimization and to improve that we need to evaluate individual passes for cost vs benefit

> Investigate Codegen Performance
> -------------------------------
>
>                 Key: IMPALA-3262
>                 URL: https://issues.apache.org/jira/browse/IMPALA-3262
>             Project: IMPALA
>          Issue Type: Task
>          Components: Perf Investigation
>    Affects Versions: Impala 2.2.4
>            Reporter: Alan Choi
>            Assignee: Mostafa Mokhtar
>            Priority: Minor
>              Labels: codegen
>         Attachments: LLVM CallStack.csv
>
>
> It has been observed that codegen for even relatively simple queries would take ~600ms. This is quite a significant overhead for fast queries. Investigate how to reduce the codegen time.



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