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https://issues.apache.org/jira/browse/PDFBOX-3988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16241920#comment-16241920
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Maciej Matecki commented on PDFBOX-3988:
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Thank you, now it looks really well :)
{code}
Page 0 rendered in 434 ms
Page 1 rendered in 293 ms
Page 2 rendered in 264 ms
Page 3 rendered in 63 ms
Page 4 rendered in 96 ms
Page 5 rendered in 198 ms
Page 6 rendered in 236 ms
Page 7 rendered in 247 ms
Page 8 rendered in 117 ms
Page 9 rendered in 104 ms
Page 10 rendered in 100 ms
---------------
Page 0 rendered in 128 ms
Page 1 rendered in 148 ms
---------------
{code}
Sorry, but I didn't notice that information about Java 8 previously.
What do you think about adding some warning to the log output when Java 8 is
used and that property is not set? I think that it could be helpful.
Thanks!
> Performance issue when rendering first page of PDF
> --------------------------------------------------
>
> Key: PDFBOX-3988
> URL: https://issues.apache.org/jira/browse/PDFBOX-3988
> Project: PDFBox
> Issue Type: Improvement
> Components: Rendering
> Affects Versions: 2.0.7
> Reporter: Maciej Matecki
> Attachments: calls.png
>
>
> Let say that you want to generate PNG for all pages in PDF.
> The generation of the first page is really slow, the second one is quite fast.
> For example test PDF contains two same PDF pages.
> First page renders in: ~2000ms
> Second one: ~220 ms
> It looks like for the first page (inv.0) there's 359 ms overhead just for
> creating the font.
> [^calls.png]
> Tried to use other library to perform the same operation with the same pdf
> file and I was able to retrieve BufferedImage of the first (slower) page in
> ~750 ms.
> For the second page the result was almost the same like for the PDFBox.
> It looks like there's the place to improve performance when starting
> rendering the PDF page.
> Or do you have any advices how to improve performance in the example project?
> Test project: https://github.com/mmatecki/pdfboxperformance
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