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From "Robert Muir (JIRA)" <>
Subject [jira] Created: (SOLR-1874) optimize patternreplacefilter
Date Fri, 09 Apr 2010 16:24:50 GMT
optimize patternreplacefilter

                 Key: SOLR-1874
             Project: Solr
          Issue Type: Improvement
          Components: Schema and Analysis
    Affects Versions: 3.1
            Reporter: Robert Muir
             Fix For: 3.1
         Attachments: SOLR-1874.patch

We can optimize PatternReplaceFilter:
* don't need to create Strings since CharTermAttribute implements CharSequence, just match
directly against it.
* reuse the matcher, since CharTermAttribute is reused, too.
* don't create Strings/waste time in replaceAll/replaceFirst if the term doesn't match the
regex at all... check with find() first.

There is more that could be done to make it faster for terms that do match, but this is simple
and a start.

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