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https://issues.apache.org/jira/browse/PDFBOX-2092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16398879#comment-16398879
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Tilman Hausherr commented on PDFBOX-2092:
-----------------------------------------
WIth the last commit, rendering time at 400% (288dpi) is now less than 4
seconds on my old computer. At 72dpi, rendering time went from 6 seconds before
to 3 seconds after the change.
> 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
> Priority: Major
> Attachments: PDFBOX-2092.patch, SCAN_20140522_160457490_page2.pdf
>
>
> 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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