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

["Kevin Jackson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kevin Jackson updated PDFBOX-956:
---------------------------------

    Attachment: 52b22bd6_69.pdf
                PDFTextStripper.java.patch

> Poor text extraction performance in PDFTextStripper.java
> --------------------------------------------------------
>
>                 Key: PDFBOX-956
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-956
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Text extraction
>    Affects Versions: 1.4.0
>            Reporter: Kevin Jackson
>             Fix For: 1.5.0
>
>         Attachments: 52b22bd6_69.pdf, PDFTextStripper.java.patch
>
>
> 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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