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https://issues.apache.org/jira/browse/LUCENE-2939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13002562#comment-13002562
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Robert Muir commented on LUCENE-2939:
-------------------------------------

Given the back compat breaks in the API, are we sure we should try to shove 
this into 3.1?

I am sympathetic to performance bugs, BUT it seems that one could use 
TermVectors and FastVectorHighlighter for these large documents, the user is 
hardly left without options.

As a safer alternative we can document the issue in CHANGES.txt and recommend 
that users take that approach for large documents, and take our time and fix 
for 3.2

> Highlighter should try and use maxDocCharsToAnalyze in 
> WeightedSpanTermExtractor when adding a new field to MemoryIndex as well as 
> when using CachingTokenStream
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-2939
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2939
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: contrib/highlighter
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>            Priority: Minor
>             Fix For: 3.1, 4.0
>
>         Attachments: LUCENE-2939.patch, LUCENE-2939.patch, LUCENE-2939.patch
>
>
> huge documents can be drastically slower than need be because the entire 
> field is added to the memory index
> this cost can be greatly reduced in many cases if we try and respect 
> maxDocCharsToAnalyze
> things can be improved even further by respecting this setting with 
> CachingTokenStream

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