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https://issues.apache.org/jira/browse/PDFBOX-3569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15728481#comment-15728481
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Andreas Lehmkühler commented on PDFBOX-3569:
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I ran some additional tests on Linux and Win7 using oracle jdk1.8.0_111 with
the following results in ascending order w.r.t. to the running time:
- {{-Dsun.java2d.cmm=sun.java2d.cmm.kcms.KcmsServiceProvider}} (fastest
appproach)
- {{org.apache.pdfbox.rendering.UsePureJavaCMYKConversion}}
- default
- {{-Dsun.java2d.cmm=sun.java2d.cmm.kcms.KcmsServiceProvider}} and
{{org.apache.pdfbox.rendering.UsePureJavaCMYKConversion}} (slowest approach)
> Performance regression in PDColorSpace#toRGBImageAWT
> ----------------------------------------------------
>
> Key: PDFBOX-3569
> URL: https://issues.apache.org/jira/browse/PDFBOX-3569
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.3, 2.1.0
> Reporter: Andreas Lehmkühler
> Assignee: Andreas Lehmkühler
> Fix For: 2.0.4, 2.1.0
>
> Attachments: PDFBOX-1058.pdf-3.png, PDFBOX-1058.pdf-3.png,
> PDFBOX-1058.pdf-3.png-diff.png, PDFBOX-2700-JCS_YCCK.pdf-1.png,
> PDFBOX-2700-JCS_YCCK.pdf-1.png, PDFBOX-2700-JCS_YCCK.pdf-1.png-diff.png,
> PDFBOX-3569-patch_v2.txt, PDFBOX-3569-patch_v3.txt,
> UNTUNT-20161205-A001-E1.pdf
>
>
> I've a private pdf containing 1900 tiny inline images (CMYK, 8bit) which
> renders way too slow. Again the CMYK2RGB conversion is the culprit here, BUT
> the known issue with the KCMS/LCMS change isn't the main problem here.
> I ran some tests on linux (PDFToImage time -imageType png -resolution 150)
> 1.6.0_37: 355s
> 1.7.0_25: 289s
> 1.7.0_75: 298s
> 1.8.0_101: cancelled after 15 min
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