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From "Gang Luo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3359) Option for no Front Encoding of term compression
Date Thu, 04 Aug 2011 00:53:27 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13079156#comment-13079156
] 

Gang Luo commented on LUCENE-3359:
----------------------------------

Yes, utf8 sequences can be compressed. But Back Encoding compression maybe better than Front
Encoding compression for Chinese words?  Many Chinese same category words have same suffix.

> Option for no Front Encoding of term compression
> ------------------------------------------------
>
>                 Key: LUCENE-3359
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3359
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: core/index
>    Affects Versions: 3.3
>            Reporter: Gang Luo
>            Priority: Minor
>              Labels: Encoding, Front, compression
>   Original Estimate: 72h
>  Remaining Estimate: 72h
>
> Average length of a word in the English language is 5.1 , so Front Encoding of term compression
in index is meaningful. But average length of a word in the Chinese language is 2.3. No need
Front Encoding for chinese document index?

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