optimize patternreplacefilter
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Key: SOLR-1874
URL: https://issues.apache.org/jira/browse/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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