[jira] Updated: (LUCENE-2201) more performance improvements for snowball

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-2201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-2201:
--------------------------------

    Attachment: LUCENE-2201.patch

patch to make snowball work on char[]

> more performance improvements for snowball
> ------------------------------------------
>
>                 Key: LUCENE-2201
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2201
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/analyzers
>            Reporter: Robert Muir
>            Priority: Minor
>         Attachments: LUCENE-2201.patch
>
>
> i took a more serious look at snowball after LUCENE-2194.
> This gives greatly improved performance, but note it has some minor breaks to snowball internals:
> * Among.s becomes a char[] instead of a string
> * SnowballProgram.current becomes a char[] instead of a StringBuilder
> * SnowballProgram.eq_s(int, String) becomes eq_s(int, CharSequence), so that eq_v(StringBuilder) doesnt need to create an extra string.
> * same as the above with eq_s_b and eq_v_b
> * replace_s(int, int, String) becomes replace_s(int, int, CharSequence), so that StringBuilder-based slice and insertion methods don't need to create an extra string.
> all of these "breaks" imho are only theoretical, the problem is just that pretty much everything is public or protected in the snowball internals.
> the performance improvement here depends heavily upon the snowball language in use, but its way more significant than LUCENE-2194.

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