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https://issues.apache.org/jira/browse/PDFBOX-4743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17018481#comment-17018481
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Tilman Hausherr edited comment on PDFBOX-4743 at 1/18/20 3:22 AM:
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Sorry, I didn't look deep enough because we've had this "massive image
slowness" often in the past. The cause is the clipping of curved areas, see
also PDFBOX-4718 and related JDK issues.
!image-2020-01-18-04-11-00-132.png!
was (Author: tilman):
Sorry, I didn't look deep enough. The cause is the clipping of curved areas,
see also PDFBOX-4718.
!image-2020-01-18-04-11-00-132.png!
> 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: image-2020-01-18-04-11-00-132.png, slow_rendering.pdf,
> without_images.pdf, without_text.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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