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https://issues.apache.org/jira/browse/LUCENE-5720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-5720:
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Attachment: LUCENE-5720.patch
Here's my first stab. this adds a fastestDirectBits(float overhead) versus
trying to integrate with the existing one, because the logic is different when
dealing with the directory API.
We can probably improve this stuff more for 5.0, e.g. the directory api was
always geared at sequential access and we might be able to introduce some API
changes later to speed it up more: but this seems like a safe win.
> Optimize on disk packed integers part 2
> ---------------------------------------
>
> Key: LUCENE-5720
> URL: https://issues.apache.org/jira/browse/LUCENE-5720
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Robert Muir
> Fix For: 4.9, 5.0
>
> Attachments: LUCENE-5720.patch
>
>
> These are heavily optimized for the in-RAM case (for example FieldCache uses
> PackedInts.FAST to make it even faster so), but for the docvalues case they
> are not: we always essentially use COMPACT, we have only one decoder that
> must solve all the cases, even the complicated ones, we use BlockPackedWriter
> for all integers (even if they are ordinals), etc.
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