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https://issues.apache.org/jira/browse/LUCENE-8511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16621627#comment-16621627
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Adrien Grand commented on LUCENE-8511:
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Out of curiosity, have you found it to be a bottleneck for something? No
objections to the change but if we are going with streams, could we make them
easier to read by putting each new operation on the stream on a new line (and
maybe moving the filtering to the outer stream)?
> MultiFields.getIndexedFields can be optimized to not use getMergedFieldInfos
> ----------------------------------------------------------------------------
>
> Key: LUCENE-8511
> URL: https://issues.apache.org/jira/browse/LUCENE-8511
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Minor
> Attachments: LUCENE-8511.patch
>
>
> MultiFields.getIndexedFields calls getMergedFieldInfos. But
> getMergedFieldInfos is kinda heavy, doing all sorts of stuff that
> getIndexedFields doesn't care about. It can simply loop the leaf readers and
> collect the results into a Set. Java 8 streams should make easy work of this.
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