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https://issues.apache.org/jira/browse/PDFBOX-4060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr updated PDFBOX-4060:
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Attachment: PDFBOX-4060-veryslow.pdf
> Slow rendering of PDF file with DeviceN jpeg file
> -------------------------------------------------
>
> Key: PDFBOX-4060
> URL: https://issues.apache.org/jira/browse/PDFBOX-4060
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.8
> Reporter: Tilman Hausherr
> Attachments: PDFBOX-4060-veryslow.pdf
>
>
> (File submitted by Soon Keong Tan on the user mailing list)
> There is a large jpeg file (5349 x 3806) that uses a DeviceN colorspace which
> in turn is based on CMYK. There's some slowness due to the type0 convert
> function from DeviceN to CMYK, but this is less than 10%. Most time is from
> converting the CMYK to RGB, one pixel at a time. (Because of the DeviceN
> colorspace we can't use bulk conversion, which may or may not be faster)
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