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https://issues.apache.org/jira/browse/FLINK-30088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17832804#comment-17832804
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Roman Boyko commented on FLINK-30088:
-------------------------------------
I've updated the PR ([https://github.com/apache/flink/pull/21406]) to optimize
only TtlMapState and added benchmark results there.
The total performance improvement is above 17%.
> Excessive state updates for TtlMapState and TtlListState
> --------------------------------------------------------
>
> Key: FLINK-30088
> URL: https://issues.apache.org/jira/browse/FLINK-30088
> Project: Flink
> Issue Type: Bug
> Components: Runtime / State Backends
> Reporter: Roman Boyko
> Assignee: Roman Boyko
> Priority: Minor
> Labels: pull-request-available
> Attachments: image-2022-11-18-20-25-14-466.png,
> image-2022-11-18-20-27-24-054.png
>
>
> After merging the FLINK-21413 every ttl check for cleanup for TtlMapState and
> TtlListState (even without expired elements) leads to whole state update.
> This is because:
> - comparison by link inside `TtlIncrementalCleanup`:
> !image-2022-11-18-20-25-14-466.png|width=450,height=288!
> - and creating new map or list inside TtlMapState or TtlListState:
> !image-2022-11-18-20-27-24-054.png|width=477,height=365!
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