[
https://issues.apache.org/jira/browse/SPARK-58680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ASF GitHub Bot updated SPARK-58680:
-----------------------------------
Labels: pull-request-available (was: )
> Use isEmpty/nonEmpty for emptiness checks in ExternalAppendOnlyMap
> ------------------------------------------------------------------
>
> Key: SPARK-58680
> URL: https://issues.apache.org/jira/browse/SPARK-58680
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 4.3.0
> Reporter: Uroš Bojanić
> Priority: Major
> Labels: pull-request-available
>
> Three emptiness checks on ArrayBuffer in ExternalAppendOnlyMap are written as
> length comparisons: kcPairs.length > 0, pairs.length == 0, and
> assert(pairs.length > 0). The same file already uses the idiomatic form
> elsewhere (spilledMaps.isEmpty, mergeHeap.nonEmpty, mergeHeap.isEmpty), as
> does the sibling ExternalSorter.
> This switches the three sites to isEmpty/nonEmpty for consistency. For
> ArrayBuffer both forms are O(1) and exactly equivalent, so this is a
> readability change with no behavior or performance difference.
> The currentMap.size > 0 check in forceSpill is deliberately left alone:
> AppendOnlyMap is an Iterable rather than a Seq and does not override
> knownSize, so isEmpty there would fall back to iterator(), which asserts that
> the map has not been destructively sorted. That check must stay a size
> comparison.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
