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Posted to issues@lucene.apache.org by "Bruno Roustant (Jira)" <ji...@apache.org> on 2021/09/10 15:55:00 UTC

[jira] [Created] (LUCENE-10097) Replace TreeMap use by HashMap when unnecessary

Bruno Roustant created LUCENE-10097:
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             Summary: Replace TreeMap use by HashMap when unnecessary
                 Key: LUCENE-10097
                 URL: https://issues.apache.org/jira/browse/LUCENE-10097
             Project: Lucene - Core
          Issue Type: Improvement
            Reporter: Bruno Roustant
            Assignee: Bruno Roustant


There are a couple of places where TreeMap is used although it could easily be replaced by a HashMap with potentially a single sort. Sometimes it would bring perf improvement (e.g. when TreeMap.entrySet() is called), other times it's more for consistency to use a simpler HashMap if there is no strong need for a TreeMap.

I saw other places where we have TODOs to see whether we can replace the TreeMap, but when it is more complex, I'll prefer to open separate Jira issues.



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