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From "Karl Wettin (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-550) InstanciatedIndex - faster but memory consuming index
Date Wed, 14 Jun 2006 07:36:30 GMT
     [ http://issues.apache.org/jira/browse/LUCENE-550?page=all ]

Karl Wettin updated LUCENE-550:
-------------------------------

    Attachment: InstanciatedIndexTermEnum.java

ArrayBoundsOutOfIndex-bugfix.

If eveything works as it should (I think so) then I'm happy to report that a FuzzyQuery seems
to be about 1500 (one thousand five hundred) times faster on this memory implementation than
on a RAMDirectory. The speed is gained by not creating a new instance of each Term in a TermEnum.


> InstanciatedIndex - faster but memory consuming index
> -----------------------------------------------------
>
>          Key: LUCENE-550
>          URL: http://issues.apache.org/jira/browse/LUCENE-550
>      Project: Lucene - Java
>         Type: New Feature

>   Components: Store
>     Versions: 1.9
>     Reporter: Karl Wettin
>  Attachments: InstanciatedIndexTermEnum.java, class_diagram.png, class_diagram.png, instanciated_20060527.tar,
lucene.1.9-karl1.jpg
>
> After fixing the bugs, it's now 4.5 -> 5 times the speed. This is true for both at
index and query time. Sorry if I got your hopes up too much. There are still things to be
done though. Might not have time to do anything with this until next month, so here is the
code if anyone wants a peek.
> Not good enough for Jira yet, but if someone wants to fool around with it, here it is.
The implementation passes a TermEnum -> TermDocs -> Fields -> TermVector comparation
against the same data in a Directory.
> When it comes to features, offsets don't exists and positions are stored ugly and has
bugs.
> You might notice that norms are float[] and not byte[]. That is me who refactored it
to see if it would do any good. Bit shifting don't take many ticks, so I might just revert
that.
> I belive the code is quite self explaining.
> InstanciatedIndex ii = ..
> ii.new InstanciatedIndexReader();
> ii.addDocument(s).. replace IndexWriter for now.

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