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https://issues.apache.org/jira/browse/LUCENE-3638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13167157#comment-13167157
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Shai Erera commented on LUCENE-3638:
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Ok. One last comment (b/c I really don't mind if it's added or not) -- I meant
that if we'll put a Set method on IR, users might falsely create a Set on every
document() call, b/c it's there and it's convenient. Maybe javadocs can warn
people against doing this ...
> IndexReader.document always return a doc with all the stored fields loaded.
> And this can be slow for the indexed document contain huge fields
> ---------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-3638
> URL: https://issues.apache.org/jira/browse/LUCENE-3638
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/index, core/search
> Affects Versions: 4.0
> Environment: 64bit linux java 1.6
> Reporter: peter chang
> Priority: Minor
> Labels: patch
> Fix For: 4.0
>
> Attachments: doc.fields.patch
>
>
> when generating digest for some documents with huge fields, it should be
> unnecessary to load the field but just interesting part of the field with the
> offset information. but indexreader always return the whole field content.
> afterward, the customized storedfieldsreader will got a repeated loading
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