[jira] Commented: (LUCENE-2507) automaton spellchecker

["Chris Male (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12916753#action_12916753 ] 

Chris Male commented on LUCENE-2507:
------------------------------------

Hey Robert,

Do you have any benchmarks for this spellchecker? I notice you mention a few times that you improved the performance.  Do you know how it compares against the separate index approach? 

Equally, is this spellchecker a conceptual drop in replacement? By that I mean, are the suggestions it generates radically different to the separate index spellcheckers or are they along the same lines?

> automaton spellchecker
> ----------------------
>
>                 Key: LUCENE-2507
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2507
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: contrib/spellchecker
>            Reporter: Robert Muir
>            Assignee: Robert Muir
>             Fix For: 4.0
>
>         Attachments: LUCENE-2507.patch, LUCENE-2507.patch, LUCENE-2507.patch, LUCENE-2507.patch
>
>
> The current spellchecker makes an n-gram index of your terms, and queries this for spellchecking.
> The terms that come back from the n-gram query are then re-ranked by an algorithm such as Levenshtein.
> Alternatively, we could just do a levenshtein query directly against the index, then we wouldn't need
> a separate index to rebuild.

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