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From "Yonik Seeley (JIRA)" <>
Subject [jira] Commented: (LUCENE-2649) FieldCache should include a BitSet for matching docs
Date Fri, 17 Sep 2010 18:28:34 GMT


Yonik Seeley commented on LUCENE-2649:

If ya care - don't pass a null parser!  Otherwise you get the default.

bq. This is OpenBitSet.cardinality()

Which isn't free... and calculating it over and over again is silly if you care about those

bq. I dont think we should add this extra cost during creation,

I don't think it will add extra cost.  I could be wrong, but I don't think it will be measurable.

> FieldCache should include a BitSet for matching docs
> ----------------------------------------------------
>                 Key: LUCENE-2649
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Ryan McKinley
>             Fix For: 4.0
>         Attachments: LUCENE-2649-FieldCacheWithBitSet.patch, LUCENE-2649-FieldCacheWithBitSet.patch,
> The FieldCache returns an array representing the values for each doc.  However there
is no way to know if the doc actually has a value.
> This should be changed to return an object representing the values *and* a BitSet for
all valid docs.

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