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https://issues.apache.org/jira/browse/PDFBOX-1814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13862819#comment-13862819
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Andreas Lehmkühler commented on PDFBOX-1814:
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I dig deeper into it and it seems that the java.awt.Graphics2D#drawImage call
in PageDrawer#drawImage is the show stopper here.
I haven't any idea yet why this happens and how to improve that.
> In some cases PDPage converttoimage is extremely slow
> ------------------------------------------------------
>
> Key: PDFBOX-1814
> URL: https://issues.apache.org/jira/browse/PDFBOX-1814
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.8.3
> Environment: all (windows, Linux, unix, jre1.6, jre1.7)
> Reporter: lieven vanlerberghe
> Attachments: extreme_slow.pdf
>
>
> I convert hundreds of documents with an average of some seconds per page.
> One type of documents takes several minutes per page.
> It is not linked to the size of the document: I extracted one page and
> generated the image on its own.
> It is not linked to the fonts, because I have the same content in another
> document (A6 format instead of A4), and there I don't have a problem.
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