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https://issues.apache.org/jira/browse/LUCENE-4687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13554990#comment-13554990
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Simon Willnauer commented on LUCENE-4687:
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bq. can the reset() method return void?
hmm not sure, I can try but its hard...
> Lazily initialize TermsEnum in BloomFilterPostingsFormat
> --------------------------------------------------------
>
> Key: LUCENE-4687
> URL: https://issues.apache.org/jira/browse/LUCENE-4687
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/codecs
> Affects Versions: 4.0, 4.1
> Reporter: Simon Willnauer
> Assignee: Simon Willnauer
> Fix For: 4.2, 5.0
>
> Attachments: LUCENE-4687.patch
>
>
> BloomFilteringPostingsFormat initializes its delegate TermsEnum directly
> inside the Terms#iterator() call which can be a pretty heavy operation if
> executed thousands of times. I suspect that bloom filter postings are mainly
> used for primary keys etc. which in turn is mostly a seekExact. Given that,
> most of the time we don't even need the delegate termsenum since most of the
> segments won't contain the key and the bloomfilter will likely return false
> from seekExact without consulting the delegate.
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