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https://issues.apache.org/jira/browse/LUCENE-10120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17437808#comment-17437808
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Lu Xugang commented on LUCENE-10120:
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Hi, [~gsmiller]
{quote}I'm not sure we necessarily need to handle the complexity of docs being
added out-of-order though{quote}
The purpose of considering whether the doc id is unordered(even some docId is
duplicated) is that I hope *DocIdSetProducer* is not just only used in
LRUQueryCache. eg. User can use *DocIdSetProducer* collect docIds in their
custom *Collector* or when *FixBitSet* was used to collect unordered even
duplicated docIds then instead of it with *DocIdSetProducer*
{quote}Feel free to incorporate the ideas from my patch file into your PR if
you think they make sense{quote}
According to the patch you posted, I rewrote *DocIdSetProducer*, so that it
only handle ordered docs and post a new PR.
I still keep *RangeDocIdSet* so that it can provide random access for
conjunction like *FixBitSet* in *BitDocIdSet* see *RangeDocIdSet#bits()*.
> Lazy initialize FixedBitSet in LRUQueryCache
> --------------------------------------------
>
> Key: LUCENE-10120
> URL: https://issues.apache.org/jira/browse/LUCENE-10120
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Affects Versions: main (10.0)
> Reporter: Lu Xugang
> Priority: Major
> Attachments: 1.png, LUCENE-10120.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Basing on the implement of collecting docIds in DocsWithFieldSet, may be we
> could do similar way to cache docIdSet in
> *LRUQueryCache#cacheIntoBitSet(BulkScorer scorer, int maxDoc)* when docIdSet
> is density.
> In this way , we do not always init a huge FixedBitSet which sometime is not
> necessary when maxDoc is large
>
>
>
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