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Posted to issues@spark.apache.org by "Wenchen Fan (JIRA)" <ji...@apache.org> on 2018/01/25 11:53:00 UTC
[jira] [Assigned] (SPARK-21717) Decouple the generated codes of
consuming rows in operators under whole-stage codegen
[ https://issues.apache.org/jira/browse/SPARK-21717?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wenchen Fan reassigned SPARK-21717:
-----------------------------------
Assignee: Liang-Chi Hsieh
> Decouple the generated codes of consuming rows in operators under whole-stage codegen
> -------------------------------------------------------------------------------------
>
> Key: SPARK-21717
> URL: https://issues.apache.org/jira/browse/SPARK-21717
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Liang-Chi Hsieh
> Assignee: Liang-Chi Hsieh
> Priority: Critical
> Fix For: 2.3.0
>
>
> It has been observed in SPARK-21603 that whole-stage codegen suffers performance degradtion, if generated functions are too long to be optimized by JIT.
> We basically produce a single function to incorporate generated codes from all physical operators in whole-stage. Thus, it is possibly to grow the size of generated function over a threshold that we can't have JIT optimization for it anymore.
> This ticket is trying to decouple the logic of consuming rows in physical operators to avoid a giant function processing rows.
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