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https://issues.apache.org/jira/browse/CALCITE-4551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17312786#comment-17312786
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James Starr commented on CALCITE-4551:
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[~julianhyde], are there any objections? If not could we move this along.
The reason I split 06d557c8b into its own commit was because I had already
marked the PR as not a draft.
> Fly Weight for MD Cache Keys
> ----------------------------
>
> Key: CALCITE-4551
> URL: https://issues.apache.org/jira/browse/CALCITE-4551
> Project: Calcite
> Issue Type: Improvement
> Reporter: James Starr
> Priority: Major
> Labels: pull-request-available
>
> Create cache keys for metadata calls generates a fair bit of object turn in
> trivial cases, more expensive than the actual metadata call. Many metadata
> calls could reuse their cache keys since the are functionally identical.
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