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From "Michael McCandless (JIRA)" <>
Subject [jira] Commented: (LUCENE-2098) make BaseCharFilter more efficient in performance
Date Tue, 16 Mar 2010 14:40:27 GMT


Michael McCandless commented on LUCENE-2098:

bq. I think this is why it got slower with my patch, in practice it didn't matter that this
thing did 'backwards linear lookup' due to this reason?

Ahh yes since presumably the test was simply looking up the offsets for the current token...

> make BaseCharFilter more efficient in performance
> -------------------------------------------------
>                 Key: LUCENE-2098
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Analysis
>    Affects Versions: 3.1
>            Reporter: Koji Sekiguchi
>            Priority: Minor
>         Attachments: LUCENE-2098.patch
> Performance degradation in Solr 1.4 was reported. See:
> The inefficiency has been pointed out in BaseCharFilter javadoc by Mike:
> {panel}
> NOTE: This class is not particularly efficient. For example, a new class instance is
created for every call to addOffCorrectMap(int, int), which is then appended to a private
> {panel}

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