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https://issues.apache.org/jira/browse/PDFBOX-3569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15666925#comment-15666925
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Andreas Lehmkühler commented on PDFBOX-3569:
--------------------------------------------
{quote}
ColorConvertOp.filter is able to take advantage of hardware acceleration and
was chosen because it was by far the fastest approach. What's changed?
{quote}
I never ran any speed tests for such cases until now. Obviously there is no
hardware acceleration in my cases (Linux native, Win7 VM and AIX). Furthermore
the gap wasn't that big if only one or just a few images are involved so that
nobody cared about that. But in my special case (1900 tiny inline images on one
page) that gap grows to a big difference.
{quote}
Note that if you're testing on VMs or AIX JVMs you're presumably not going to
get any hardware acceleration, so these may be meaningless comparisons.
{quote}
I've never intended to compare the end results of different
platforms/enviroment, but IMHO it is interesting that the releative
acceleration by my patch differs a lot.
> 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
>
>
> 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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