[jira] [Commented] (LUCENE-9045) Do not use TreeMap/TreeSet in BlockTree and PerFieldPostingsFormat

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-9045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16986054#comment-16986054 ] 

ASF subversion and git services commented on LUCENE-9045:
---------------------------------------------------------

Commit 71f1bc33b37004b47b75c4f4d46028743637d41c in lucene-solr's branch refs/heads/master from Bruno Roustant
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=71f1bc3 ]

LUCENE-9045: Do not use TreeMap/TreeSet in BlockTree and PerFieldPostingsFormat.

Closes #1007


> Do not use TreeMap/TreeSet in BlockTree and PerFieldPostingsFormat
> ------------------------------------------------------------------
>
>                 Key: LUCENE-9045
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9045
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Bruno Roustant
>            Assignee: Bruno Roustant
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> TreeMap/TreeSet is a heavy structure designed to dynamically sort keys. It's iterator is much less performant than a list iterator. We should not use it when we don't need the sorting capability once built.
> And this is the case in BlockTreeTermsReader and PerFieldPostingsFormat. We need a Map and to sort keys at building time. But once built, we don't need to sort anymore, we can use a simple list for iteration efficiency.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@lucene.apache.org
For additional commands, e-mail: issues-help@lucene.apache.org