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https://issues.apache.org/jira/browse/ARROW-16758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Farmer updated ARROW-16758:
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Component/s: C++
> [C++] Rewrite ExecuteScalarExpression to not use ScalarExecutor
> ---------------------------------------------------------------
>
> Key: ARROW-16758
> URL: https://issues.apache.org/jira/browse/ARROW-16758
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
>
> {{ExecuteScalarExpression}} sets up and tears down {{ScalarExecutor}} from
> exec.cc for each node in the expression tree. This adds a ton of overhead
> from moving around non-trivial objects. After ARROW-16756, we should write a
> new ScalarExpressionExecutor which is careful to construct ArraySpans and
> execute the expression tree in a much more lightweight / less bloated
> fashion.
> Follow on work in a subsequent Jira will add a pool/stack of allocated
> temporary buffers to reuse during execution
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