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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (JIRA)" <ji...@apache.org> on 2018/02/25 09:46:00 UTC
[jira] [Comment Edited] (PDFBOX-4121)
(-Dorg.apache.pdfbox.rendering.UsePureJavaCMYKConversion=true) takes much
time
[ https://issues.apache.org/jira/browse/PDFBOX-4121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16375991#comment-16375991 ]
Tilman Hausherr edited comment on PDFBOX-4121 at 2/25/18 9:45 AM:
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I ran the profiler and it turns out that the loading of the image itself is slow:
{code}
ImageReader reader = ImageIO.getImageReadersByFormatName("JPEG2000").next();
FileInputStream input = new FileInputStream("PDFBOX-4121.jp2");
ImageInputStream iis = ImageIO.createImageInputStream(input);
reader.setInput(iis, true, true);
reader.read(0);
{code}
this takes a long time when read from a stream. Not when read from a file. And not with this small modification:
{code}
ImageReader reader = ImageIO.getImageReadersByFormatName("JPEG2000").next();
FileInputStream input = new FileInputStream("PDFBOX-4121.jp2");
ImageInputStream iis = new MemoryCacheImageInputStream(input);
reader.setInput(iis, true, true);
reader.read(0);
{code}
It turns out that java was providing a {{FileCacheImageInputStream}}.
was (Author: tilman):
The loading of the image itself is slow:
{code}
ImageReader reader = ImageIO.getImageReadersByFormatName("JPEG2000").next();
FileInputStream input = new FileInputStream("PDFBOX-4121.jp2");
ImageInputStream iis = ImageIO.createImageInputStream(input);
reader.setInput(iis, true, true);
reader.read(0);
{code}
this takes a long time when read from a stream. Not when read from a file. And not with this small modification:
{code}
ImageReader reader = ImageIO.getImageReadersByFormatName("JPEG2000").next();
FileInputStream input = new FileInputStream("PDFBOX-4121.jp2");
ImageInputStream iis = new MemoryCacheImageInputStream(input);
reader.setInput(iis, true, true);
reader.read(0);
{code}
It turns out that java was providing a {{FileCacheImageInputStream}}.
> (-Dorg.apache.pdfbox.rendering.UsePureJavaCMYKConversion=true) takes much time
> ------------------------------------------------------------------------------
>
> Key: PDFBOX-4121
> URL: https://issues.apache.org/jira/browse/PDFBOX-4121
> Project: PDFBox
> Issue Type: Improvement
> Components: Rendering
> Affects Versions: 2.0.8
> Reporter: savan patel
> Priority: Major
> Labels: DeviceCMYK
> Attachments: 5a55177653dee.pdf, PDFBOX-4121.jp2
>
>
> I have a pdf in which page 1 gets around 45 sec to render when i set the property (-Dorg.apache.pdfbox.rendering.UsePureJavaCMYKConversion=true) and without it it takes 20 sec.
> and something weird happens to me. when i don't set this property (System.setProperty("sun.java2d.cmm", "sun.java2d.cmm.kcms.KcmsServiceProvider")) then i get this warning "WARNING: Could not read JPEG 2000 (JPX) image" . is it some jar related warning or it happen to u also?
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