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https://issues.apache.org/jira/browse/LUCENE-6320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-6320:
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Attachment: LUCENE-6320.patch
Here is a patch. We use codec apis to do these checks, so the optimizations we
already worked on for merge help a lot (esp. stored fields, norms, docvalues).
When we check postings without deletes, we weren't reusing postingsenum and
were clone()'ing for every term.
FieldInfos.get(int) is a cpu hog for stored fields and vectors, since its
called for every field in the doc and we do O(log N) lookup each time. Its
wasteful in memory usually too (using a treemap always when in most cases a
simple array is smaller and faster).
> speed up checkindex
> -------------------
>
> Key: LUCENE-6320
> URL: https://issues.apache.org/jira/browse/LUCENE-6320
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Attachments: LUCENE-6320.patch
>
>
> This is fairly slow today, very ram intensive, and has some buggy stuff (e.g.
> postingsenum reuse bugs). We can do better...
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