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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-2750) add Kamikaze 3.0.1 into Lucene
Date Tue, 09 Jul 2013 15:39:49 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13703385#comment-13703385
] 

Adrien Grand commented on LUCENE-2750:
--------------------------------------

For the record, Daniel Lemire wrote a post about PFOR delta decompression speed at http://lemire.me/blog/archives/2013/07/08/fast-integer-compression-in-java/.
I have not dug the reasons that may explain why his implementation is faster than kamikaze
or if the benchmark itself is relevant to Lucene but I think it's something worth looking
into.
                
> add Kamikaze 3.0.1 into Lucene
> ------------------------------
>
>                 Key: LUCENE-2750
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2750
>             Project: Lucene - Core
>          Issue Type: Sub-task
>          Components: modules/other
>            Reporter: hao yan
>            Assignee: Adrien Grand
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>
> Kamikaze 3.0.1 is the updated version of Kamikaze 2.0.0. It can achieve significantly
better performance then Kamikaze 2.0.0 in terms of both compressed size and decompression
speed. The main difference between the two versions is Kamikaze 3.0.x uses the much more efficient
implementation of the PForDelta compression algorithm. My goal is to integrate the highly
efficient PForDelta implementation into Lucene Codec.

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