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https://issues.apache.org/jira/browse/LUCENE-2086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12780685#action_12780685
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Yonik Seeley commented on LUCENE-2086:
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bq. Though, you need relatively high density of deletions to see that.
Yep, but re-indexing a whole bunch of documents is a common case - and that
will give a very high density (often consecutive terms).
Also, it may be a complete index build / rebuild, where all the terms will be
consecutive. Solr, for instance, can't tell if there are any duplicates when
building an index from scratch, so it must use update(). There is a way to
tell Solr not to enforce duplicate overwriting (overwrite=false param) but I
doubt many people do that, and it risks user error (using it when there are
dups in the docs being added, or already in the index).
> When resolving deletes, IW should resolve in term sort order
> ------------------------------------------------------------
>
> Key: LUCENE-2086
> URL: https://issues.apache.org/jira/browse/LUCENE-2086
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 3.1
>
> Attachments: LUCENE-2086.patch
>
>
> See java-dev thread "IndexWriter.updateDocument performance improvement".
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