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https://issues.apache.org/jira/browse/IMPALA-11470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yida Wu reassigned IMPALA-11470:
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Assignee: Yida Wu
> Support Caching Codegen Functions
> ---------------------------------
>
> Key: IMPALA-11470
> URL: https://issues.apache.org/jira/browse/IMPALA-11470
> Project: IMPALA
> Issue Type: Task
> Components: Backend
> Reporter: Yida Wu
> Assignee: Yida Wu
> Priority: Major
>
> Impala traditionally has been a leader in low latency queries. However, it is
> reported that for sub second queries codegen could take the majority of the
> time, for example, codegen alone can take 300ms for a sub second query.
>
> This task aims to add support of memory caches for codegen functions to
> improve the performance of sub second queries by reducing the codegen
> generation time. Users can specify the total cache size for all of the
> codegen functions and which query is going to use the cache.
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