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https://issues.apache.org/jira/browse/PDFBOX-5809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17841939#comment-17841939
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Marcus Korinth commented on PDFBOX-5809:
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[~tilman] Thank you for your in depth analysis.
Our splitter cleans the mentioned remains and far more than the on-board
splitter does after splitting the original document.
The clean-up is done after in order to avoid changing the original file
accidentally - although it might be clever to temporarily change the original
document (or to create a copy) before splitting it.
Any reason why it was so much faster in the 2.X versions? - I also thought it
was fast in 3.0.1. Hmm
Is this likely to get fixed with the release of 3.0.3?
Thanks for your effort!
> PDDocument#importPage slowed down by factor 1300
> ------------------------------------------------
>
> Key: PDFBOX-5809
> URL: https://issues.apache.org/jira/browse/PDFBOX-5809
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.0.31, 3.0.2 PDFBox
> Reporter: Marcus Korinth
> Priority: Major
> Fix For: 2.0.32, 4.0.0, 3.0.3 PDFBox
>
> Attachments: image-2024-04-27-18-50-19-199.png
>
>
> We are using the *PDDocument#importPage* Method in our own splitter where we
> split pages from a _SourceDocument_ to a _TargetDocument_. In order to do so
> we first extract the page by using the following code:
> {code:java}
> final PDPage sourcePage = sourceDocument.getPage(pageNumber);
> {code}
> Immediatly afterwards we are calling:
> {code:java}
> final PDPage targetPage = targetDocument.importPage(sourcePage);
> {code}
> This approach worked just fine with *pdfbox 2.0.26*.
> We decided to upgrade to version *3.0.2* since it takles a lot of the
> problems.
> Unfortunately the *PDDocument#importPage* method slowed down by around 1300
> times. In Version *2.0.26* it took 15ms in an average. With the latest
> *3.0.2* it takes 20000 ms in average. That is a huge deal breaker as we
> usually have to split documents which have several thousand pages.
> Note: The same applies when using *PDDocument#addPage*.
> Note: The problem does not appear in *3.0.1*. But we can't use that since it
> has other major problems which breaks our application.
> I have prepared an example document with which you can replicate the issue.
> Due to the file size limitation I had to prepare a WeTransfer-Link for you:
> https://we.tl/t-lfN2wz7cAs
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