David Smiley created LUCENE-8511:
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Summary: 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
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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