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https://issues.apache.org/jira/browse/PDFBOX-5952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17926691#comment-17926691
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Andreas Lehmkühler commented on PDFBOX-5952:
--------------------------------------------

How about using some sort of checksum of the binary data of the profile as key 
for a possible cache? The resource cache is already passed to the colorspace 
and could be extended to manage such a cache.

I've ran a test with a hacky "cache" and the rendering time is down to several 
seconds.

> PDFRenderer causes endless loop
> -------------------------------
>
>                 Key: PDFBOX-5952
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5952
>             Project: PDFBox
>          Issue Type: Bug
>    Affects Versions: 3.0.4 PDFBox
>            Reporter: Andreas Koch
>            Priority: Major
>         Attachments: ijms-25-00052-v2.pdf_12.pdf, 
> image-2025-02-12-10-16-04-596.png
>
>
> {code:java}
> Path path = Paths.get("ijms-25-00052-v2.pdf");                
> PDDocument doc = Loader.loadPDF(path.toFile());               
> PDFRenderer renderer = new PDFRenderer(doc);          
> BufferedImage image = renderer.renderImageWithDPI(0, 72, ImageType.RGB); 
> {code}
> When trying to convert the attached pdf page to an image an endless loop 
> occures and the following log statements repeats itself. 
>  
> {color:#ff0000}Feb. 11, 2025 5:42:10 NACHM. 
> org.apache.pdfbox.pdmodel.graphics.color.PDICCBased 
> ensureDisplayProfile{color}
> {color:#ff0000}WARNUNG: ICC profile is Perceptual, ignoring, treating as 
> Display class{color}
>  



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