[PDFBOX-2092] Very slow rendering of scanned document

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.9, 3.0.0 PDFBox
• Component/s: Rendering
• Labels: optimization
• Environment: Win7 x64 EN; JDK6,JDK7,JDK8
• Assignee: Tilman Hausherr
• Reporter: Juraj Lonc
• Created: 23/May/14 11:14
• Updated: 24/Mar/18 09:41
• Resolved: 14/Mar/18 16:59

Description

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

PageDrawer.drawImage(Image awtImage, AffineTransform at)

when I comment out line

graphics.drawImage(awtImage, imageTransform, null);

then rendering process takes 6s