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https://issues.apache.org/jira/browse/LUCENE-10002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17481884#comment-17481884
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ASF subversion and git services commented on LUCENE-10002:
----------------------------------------------------------

Commit 11006fba59d1d4cad28c7c4c917c9288f5206fc5 in lucene's branch 
refs/heads/main from Luca Cavanna
[ https://gitbox.apache.org/repos/asf?p=lucene.git;h=11006fb ]

LUCENE-10002: Replace simple usages of TotalHitCountCollector with 
IndexSearcher#count (#612)

In case only number of documents are collected, IndexSearcher#search(Query, 
Collector) is commonly used, which does not use the executor that's been 
eventually set to the searcher. Calling `IndexSearcher#count(Query)` makes the 
code more concise and is also more correct as it honours the executor that's 
been set to the searcher instance.

Co-authored-by: Adrien Grand <jpou...@gmail.com>

> Remove IndexSearcher#search(Query,Collector) in favor of 
> IndexSearcher#search(Query,CollectorManager)
> -----------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-10002
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10002
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Priority: Minor
>          Time Spent: 8h 40m
>  Remaining Estimate: 0h
>
> It's a bit trappy that you can create an IndexSearcher with an executor, but 
> that it would always search on the caller thread when calling 
> {{IndexSearcher#search(Query,Collector)}}.
>  Let's remove {{IndexSearcher#search(Query,Collector)}}, point our users to 
> {{IndexSearcher#search(Query,CollectorManager)}} instead, and change factory 
> methods of our main collectors (e.g. {{TopScoreDocCollector#create}}) to 
> return a {{CollectorManager}} instead of a {{Collector}}?



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