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https://issues.apache.org/jira/browse/LUCENE-8796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16835597#comment-16835597
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Yonik Seeley commented on LUCENE-8796:
--------------------------------------
Hmmm, that looks like it's searching the whole space each time instead of
starting that the current point?
Presumably this:
{code}
while(bound < length && docs[bound] < target) {
{code}
Should be something like this:
{code}
while(i+bound < length && docs[i+bound] < target) {
{code}
And also adjust the bounds of the following binary search to match as well.
> Use exponential search in IntArrayDocIdSet advance method
> ---------------------------------------------------------
>
> Key: LUCENE-8796
> URL: https://issues.apache.org/jira/browse/LUCENE-8796
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Luca Cavanna
> Priority: Minor
>
> Chatting with [~jpountz] , he suggested to improve IntArrayDocIdSet by making
> its advance method use exponential search instead of binary search. This
> should help performance of queries including conjunctions: given that
> ConjunctionDISI uses leap frog, it advances through doc ids in small steps,
> hence exponential search should be faster when advancing on average compared
> to binary search.
>
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