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https://issues.apache.org/jira/browse/ARROW-13338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17382292#comment-17382292
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David Li commented on ARROW-13338:
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I would vote for #2 as well - maybe we don't need to add deprecation warnings
yet (for 6.0.0 perhaps) especially if we want to leave it as a fallback for now
while we iron out any potential kinks.
> [C++][Dataset] Make async Scanner the default
> ---------------------------------------------
>
> Key: ARROW-13338
> URL: https://issues.apache.org/jira/browse/ARROW-13338
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Ben Kietzman
> Priority: Major
> Labels: dataset
>
> The synchronous Scanner is not integrated with ExecPlans and doesn't offer
> better performance in any case than the asynchronous scanner, so we should
> start migrating away from the extraneous code path so it can be deprecated
> and then deleted.
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