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https://issues.apache.org/jira/browse/PDFBOX-1798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13841446#comment-13841446
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Thomas Chojecki commented on PDFBOX-1798:
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There is a similar issue pending. PDFBOX-1614
I just forgot about it and will take some look at yours and the other issue.
> Performance problem with PDDocument.saveIncremental (when signing document)
> ---------------------------------------------------------------------------
>
> Key: PDFBOX-1798
> URL: https://issues.apache.org/jira/browse/PDFBOX-1798
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel, Signing
> Affects Versions: 1.8.3, 2.0.0
> Reporter: Dmytro Karimov
> Labels: patch, performance
> Fix For: 1.8.4
>
> Attachments: PDFBOX-1798.patch
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> Performance problem in class COSWriter:
> Constructor of COSWriter takes 2 args:
> COSWriter(OutputStream os, FileInputStream is)
> method saveIncremental in class PDDocument:
> saveIncremental(FileInputStream input, OutputStream output)
> It create COSWriter with this args. If I pass FileInputStream into
> saveIncremental then signing the document goes quite a long time.
> If you pass BufferedInputStream, the signing speed is increases. But alas,
> this is not possible, because the parameters of the method saveIncremental
> does not allow to do this.
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