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https://issues.apache.org/jira/browse/PDFBOX-5091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17277311#comment-17277311
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Tilman Hausherr commented on PDFBOX-5091:
-----------------------------------------
This is the default renderinghints, so the default is high quality
{code}
private RenderingHints createDefaultRenderingHints(Graphics2D graphics)
{
RenderingHints r = new RenderingHints(null);
r.put(RenderingHints.KEY_INTERPOLATION, isBitonal(graphics) ?
RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR :
RenderingHints.VALUE_INTERPOLATION_BICUBIC);
r.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
r.put(RenderingHints.KEY_ANTIALIASING, isBitonal(graphics) ?
RenderingHints.VALUE_ANTIALIAS_OFF :
RenderingHints.VALUE_ANTIALIAS_ON);
return r;
}
{code}
I was unable to reproduce that it is fast. What exact jdk8 are you using and on
what OS, and what code are you using?
> Performance issue when saving PDF to image after upgrading from PDFBox 2.0.20
> to 2.0.21
> ---------------------------------------------------------------------------------------
>
> Key: PDFBOX-5091
> URL: https://issues.apache.org/jira/browse/PDFBOX-5091
> Project: PDFBox
> Issue Type: Bug
> Environment: JDK 8 on Windows10
> Reporter: Volker Ullmann
> Priority: Minor
> Attachments: single_page.pdf
>
>
> We use PDFBox to save the first page of a PDF as an image to provide a
> preview of the document. These PDFs can be relatively complex as they may
> contain ten thousands of objects, especially map data. The results are still
> fine, but when we upgraded from 2.0.20 to 2.0.21 we had a notable performance
> decrease. Saving the first page of the attached sample document now takes
> nearly 20 sec on my developer machine, compared to 4 sec with 2.0.20.
>
>
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