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From "Adrien Grand (JIRA)" <>
Subject [jira] [Commented] (LUCENE-2750) add Kamikaze 3.0.1 into Lucene
Date Fri, 09 Aug 2013 21:00:48 GMT


Adrien Grand commented on LUCENE-2750:

Hi Jack. Indeed the patch consists more of a reimplementation in order to leverage existing
pieces of code we have in Lucene for bit packing and to borrow some ideas from Daniel Lemire's
FastPFor (
> add Kamikaze 3.0.1 into Lucene
> ------------------------------
>                 Key: LUCENE-2750
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Sub-task
>          Components: modules/other
>            Reporter: hao yan
>            Assignee: Adrien Grand
>         Attachments: LUCENE-2750.patch, LUCENE-2750.patch, LUCENE-2750.patch
>   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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