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https://issues.apache.org/jira/browse/PDFBOX-4491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr updated PDFBOX-4491:
------------------------------------
    Labels: optimization  (was: )

> slow rendering for PDF
> ----------------------
>
>                 Key: PDFBOX-4491
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4491
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Rendering
>    Affects Versions: 2.0.14
>            Reporter: Padovan Stefano
>            Priority: Major
>              Labels: optimization
>         Attachments: BUCH42 Pascu Guideline adapted.pdf, Screenshot 
> 2019-03-19 at 18.09.12.png
>
>
> When rendering the attached PDF page by page, it takes about 2 minutes 30 
> seconds on my machine.
> Attached also the CPU sample of visualVM.
> code is as simple as:
> {code:java}
> PDFRenderer pdfRenderer = new PDFRenderer(pdf);
> for (int i = 0; i < pdf.getNumberOfPages(); i++) {
>   ImageIO.write(pdfRenderer.renderImage(i), "bmp", new File("image-" + i + 
> ".bmp"));
> }{code}



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