[
https://issues.apache.org/jira/browse/ARROW-8761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17448171#comment-17448171
]
Antoine Pitrou commented on ARROW-8761:
---------------------------------------
The linked PR has shown this proposal to be undesirable in terms of
performance, so I'm going to close.
> [C++] Improve the performance of minmax kernel
> ----------------------------------------------
>
> Key: ARROW-8761
> URL: https://issues.apache.org/jira/browse/ARROW-8761
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Liya Fan
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> We improve the performance of the max-min kernel with the simple idea: if the
> current value is smaller than the current min value; then there is no need to
> compare it against the current max value, because it must be smaller than the
> current max value.
> This simple trick reduces the expected number of comparisons from 2n to 1.5n,
> which can be notable for large arrays.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
