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https://issues.apache.org/jira/browse/LUCENE-2824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973177#action_12973177
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Robert Muir commented on LUCENE-2824:
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Paul I agree with your sentiments, for this issue I'd like to stick with this
patch as just a small step (reducing bounds checks on average).
In general, I think its probably the case we can improve our i/o (especially
BufferedIndexInput) to be more efficient with
the int block codecs, don't hesitate to open more issues if there are ideas,
I've definitely been testing a lot of crazy things, but
the others didn't pan out :)
> optimizations for bufferedindexinput
> ------------------------------------
>
> Key: LUCENE-2824
> URL: https://issues.apache.org/jira/browse/LUCENE-2824
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 3.1, 4.0
> Reporter: Robert Muir
> Attachments: LUCENE-2824.patch
>
>
> along the same lines as LUCENE-2816:
> * the readVInt/readVLong/readShort/readInt/readLong are not optimal here
> since they defer to readByte. for example this means checking the buffer's
> bounds per-byte in readVint instead of per-vint.
> * its an easy win to speed this up, even for the vint case: its essentially
> always faster, the only slower case is 1024 single-byte vints in a row, in
> this case we would do a single extra bounds check (1025 instead of 1024)
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