[jira] Issue Comment Edited: (PDFBOX-956) Poor text extraction performance in PDFTextStripper.java

["Andreas Lehmkühler (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995708#comment-12995708 ] 

Andreas Lehmkühler edited comment on PDFBOX-956 at 2/17/11 7:54 AM:
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The minimum requirements for PDFBox are java 1.5 and I guess that won't be changed in a near future.

As I introduced the issue I'll take care of this.

      was (Author: lehmi):
    The minimum requirements for PDFBox are java 1.5 and I guess that won't be changed in a near future.

I'll take care of this.
  
> Poor text extraction performance in PDFTextStripper.java
> --------------------------------------------------------
>
>                 Key: PDFBOX-956
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-956
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Text extraction
>    Affects Versions: 1.4.0
>            Reporter: Kevin Jackson
>            Assignee: Andreas Lehmkühler
>             Fix For: 1.5.0
>
>         Attachments: PDFBOX956-c4ce2fcd_69.txt, PDFTextStripper.java.patch, c4ce2fcd_69.pdf
>
>
> The worst case performance of the suppressDuplicateOverlappingText logic in processTextPosition is O(n^2).
> The patch is to use a TreeMap to achieve O(N log N) performance.
> The example PDF took over 2 hours to extract the text before this patch and less than 10 minute after.
> BTW:  The extracted text is also quite different compared to Adobe Reader.  Not sure which is correct but for this document it doesn't matter.

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