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Tilman Hausherr edited comment on PDFBOX-5051 at 12/18/20, 7:49 AM: -------------------------------------------------------------------- The file contains 836 inline images of size 76x1 with an ICC colorspace. The time is lost in {{PDColorSpace.toRGBImageAWT()}} which calls {{ColorConvertOp.filter()}} to convert from the ICC colorspace to RGB. was (Author: tilman): The file contains 836 inline images of size 76x1 with an ICC colorspace. The time is lost in {{PDColorSpace.toRGBImageAWT()}} which calls {{ColorConvertOp}} to convert from the ICC colorspace to RGB. > Slow rendering for specific PDF file > ------------------------------------ > > Key: PDFBOX-5051 > URL: https://issues.apache.org/jira/browse/PDFBOX-5051 > Project: PDFBox > Issue Type: Bug > Components: Rendering > Affects Versions: 2.0.21 > Environment: Amazon Coretto jdk11.0.3_7, OpenJDK 15 > Reporter: Stefan Mueller > Priority: Major > Attachments: slowpdfbox.pdf > > > Doing PDF rendering upon the document being attached is rather slow. > It takes 18 seconds on a Core i7 machine with 32 GB of RAM and no maximum > being imposed upon the JVM. > {code:java} > System.setProperty("sun.java2d.cmm", > "sun.java2d.cmm.kcms.KcmsServiceProvider"); > long ms = System.currentTimeMillis(); > try (final PDDocument document = PDDocument.load(new > File("C:\\temp\\slowpdfbox.pdf"))) > { > ms = System.currentTimeMillis() -ms; > System.out.println("Took " + ms + " milliseconds for loading"); > > PDFRenderer pdfRenderer = new PDFRenderer(document); > pdfRenderer.setSubsamplingAllowed(true); > for (int page = 0; page < 1; ++page) > { > ms = System.currentTimeMillis(); > BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB); > > ms = System.currentTimeMillis() -ms; > System.out.println("Took " + ms + " milliseconds for rendering"); > > > String fileName = "c:\\temp\\test.jpg"; > ImageIOUtil.writeImage(bim, fileName, 300); //<---this number > } > document.close(); > } > catch (IOException e){ > System.err.println("Exception while reading pdf document - " + e); > } > {code} > Console Output: > Took 262 milliseconds for loading > Dez. 18, 2020 6:25:15 VORM. > org.apache.pdfbox.pdmodel.graphics.color.PDICCBased ensureDisplayProfile > WARNUNG: ICC profile is Perceptual, ignoring, treating as Display class > Took 17914 milliseconds for rendering > > -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org