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https://issues.apache.org/jira/browse/LUCENE-1286?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Miller closed LUCENE-1286.
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    Resolution: Fixed

This isn't likely to go anywhere anytime soon - Koji's FastVectorHighlighter, 
while requiring termvectors, accomplishes this pretty nicely.

> LargeDocHighlighter - another span highlighter optimized for large documents
> ----------------------------------------------------------------------------
>
>                 Key: LUCENE-1286
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1286
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/highlighter
>    Affects Versions: 2.4
>            Reporter: Mark Miller
>            Priority: Minor
>
> The existing Highlighter API is rich and well designed, but the approach 
> taken is not very efficient for large documents.
> I believe that this is because the current Highlighter rebuilds the document 
> by running through and scoring every every token in the tokenstream.
> With a break in the current API, an alternate approach can be taken: rebuild 
> the document by running through the query terms by using their offsets. The 
> benefit is clear - a large doc will have a large tokenstream, but a query 
> will likely be very small in comparison.
> I expect this approach to be quite a bit faster for very large documents, 
> while still supporting Phrase and Span queries.
> First rough patch to follow shortly.

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