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https://issues.apache.org/jira/browse/LUCENE-9025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16958265#comment-16958265
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Adrien Grand commented on LUCENE-9025:
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We don't need a new method for this, we just need to optimize seekCeil for the
case that the looked up term is greater than the current one?
https://github.com/apache/lucene-solr/blob/master/lucene/core/src/java/org/apache/lucene/codecs/lucene80/Lucene80DocValuesProducer.java#L1059
> Add more efficient lookupTerm() overload to SortedSetDocValues
> --------------------------------------------------------------
>
> Key: LUCENE-9025
> URL: https://issues.apache.org/jira/browse/LUCENE-9025
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Affects Versions: master (9.0)
> Reporter: Jason Gerlowski
> Priority: Minor
> Attachments: LUCENE-9025.patch
>
>
> {{SortedSetDocValues.lookupTerm(BytesRef)}} performs a binary search of the
> entire docValues range to find the ordinal of the requested BytesRef.
> For an individual invocation, this is optimal. Without other context, binary
> search needs to cover the entire space.
> But there are some common uses of {{lookupTerm}} where this shouldn't be
> necessary. For example: making multiple {{lookupTerm}} calls to fetch the
> ordinals for each value in a sorted list of terms. {{lookupTerm}} will
> binary-search the whole space on each invocation, even though the caller
> knows that there's no point searching anything before the ordinal that came
> back from the previous {{lookupTerm}} call.
> I propose we add a {{SortedSetDocValues.lookupTerm}} overload which takes a
> lower-bound to start the binary search at: {{public long lookupTerm(BytesRef
> key, long lowerSearchBound) throws IOException}} This saves each
> binary-search a few iterations in usage scenarios like the one described
> above, which can conceivably add up.
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