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https://issues.apache.org/jira/browse/PDFBOX-4016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257163#comment-16257163
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Tilman Hausherr commented on PDFBOX-4016:
-----------------------------------------

Your PDF contains 2408 CMYK images with height of a single pixel. That's very 
inefficient, and it took 1424 seconds on a slow PC.

You can speed up rendering with the two tricks mentioned here:
https://pdfbox.apache.org/2.0/getting-started.html

With the first trick it takes 40 seconds. With the second, it goes down to 4 
seconds. (72 dpi)

> jvm crash when converting the attached pdf to image
> ---------------------------------------------------
>
>                 Key: PDFBOX-4016
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4016
>             Project: PDFBox
>          Issue Type: Bug
>         Environment: pdfbox 2.0.8 mac pro10.12.6
>            Reporter: sunnyawake
>            Priority: Critical
>         Attachments: 111709013868.pdf.pdf
>
>
> jvm crash when convert the attached pdf(one page) to image.



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