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https://issues.apache.org/jira/browse/ARROW-8847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17110556#comment-17110556
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David Li commented on ARROW-8847:
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This looks good to me.
> [C++] Pass task size / metrics in Executor API
> ----------------------------------------------
>
> Key: ARROW-8847
> URL: https://issues.apache.org/jira/browse/ARROW-8847
> Project: Apache Arrow
> Issue Type: Wish
> Components: C++
> Reporter: Antoine Pitrou
> Assignee: Antoine Pitrou
> Priority: Major
>
> For now, our ThreadPool implementation would ignore those metrics, but other
> implementations may use it for custom ordering.
> Example metrics:
> * IO size (number of bytes)
> * CPU cost (~ number of instructions)
> * Priority (opaque integer? lower is more urgent)
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