[jira] [Resolved] (PDFBOX-2092) Very slow rendering of scanned document

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-2092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tilman Hausherr resolved PDFBOX-2092.
-------------------------------------
       Resolution: Fixed
         Assignee: Tilman Hausherr
    Fix Version/s: 3.0.0 PDFBox
                   2.0.9

Setting to resolved because I think that 4 seconds is OK for a PDF with such a huge image. I'm also attaching a screenshot from the profiler. If you have a good idea to speed this up even more, please create a new issue.

> Very slow rendering of scanned document
> ---------------------------------------
>
>                 Key: PDFBOX-2092
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2092
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Rendering
>    Affects Versions: 2.0.0
>         Environment: Win7 x64 EN
> JDK6,JDK7,JDK8
>            Reporter: Juraj Lonc
>            Assignee: Tilman Hausherr
>            Priority: Major
>              Labels: optimization
>             Fix For: 2.0.9, 3.0.0 PDFBox
>
>         Attachments: PDFBOX-2092.patch, SCAN_20140522_160457490_page2.pdf, screenshot-profiler.png
>
>
> It takes extremely long to render this file to image.
> Depends on computer but it can take 15s+ to render 1 page.
> When I skip drawing of inserted image /Im0, then rendering is fast. So there is something wrong with drawing that image in
> {code}
> PageDrawer.drawImage(Image awtImage, AffineTransform at)
> {code}
> when I comment out line 
> {code}
> graphics.drawImage(awtImage, imageTransform, null);
> {code}
> then rendering process takes 6s



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