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https://issues.apache.org/jira/browse/LUCENE-4443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13469429#comment-13469429
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Robert Muir commented on LUCENE-4443:
-------------------------------------
Well this is an experimental codec (not the default format), and its likely we
might change it anyway.
I really don't like the idea of backporting optimizations to the release branch.
Nobody has to reindex if they dont want anyway, they can use addIndexes or
whatever to switch their index
back to the lucene's official index format, upgrade to 4.1, and then switch
back to the new block.
> BlockPostingsFormat writes unnecessary skipdata
> -----------------------------------------------
>
> Key: LUCENE-4443
> URL: https://issues.apache.org/jira/browse/LUCENE-4443
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/codecs
> Affects Versions: 4.0
> Reporter: Robert Muir
> Fix For: 4.1, 5.0
>
> Attachments: LUCENE-4443.patch
>
>
> Seems to me lastStartOffset is unnecessary, when we skip to a document, it
> implicitly is 0: see BlockPostingsWriter.startDoc.
> (Unless I'm missing something, all tests pass with "Block" if i remove it)
> Separately we should really think about lastPayloadByteUpto, is this worth
> it? instead when we actually skip, we could sum the payloadLengthBuffer from
> 0..curPosBufferUpto as we are going to decode that block anyway?
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