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https://issues.apache.org/jira/browse/PDFBOX-4743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17018245#comment-17018245
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Tilman Hausherr commented on PDFBOX-4743:
-----------------------------------------
The file is slow but this is because it has 1736 images. Please attach the
other file to support your argument.
> Long rendering time of fonts in a specific PDF
> ----------------------------------------------
>
> Key: PDFBOX-4743
> URL: https://issues.apache.org/jira/browse/PDFBOX-4743
> Project: PDFBox
> Issue Type: Improvement
> Environment: Gentoo Linux, Java 8
> Reporter: Daniel Persson
> Priority: Minor
> Attachments: slow_rendering.pdf
>
>
> Hi Team.
>
> We have found a PDF that takes a long time to render images.
>
> After some checking, we found that the one page takes more than 2 minutes to
> render, but if we remove the font information and render the PDF without
> text, it takes 3 seconds.
>
> Just looking at the font information, it doesn't seem to be a lot of data.
> 3-5kb per font and there are only about seven fonts defined. So there must be
> something else that complicates things.
>
> Best regards
> Daniel
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