[PDFBOX-4150] Optimize clipping text rendering modes

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.8
• Fix Version/s: 2.0.9, 3.0.0 PDFBox
• Component/s: Rendering
• Labels: optimization
• External issue URL: https://stackoverflow.com/questions/21519007/fast-union-of-shapes-in-java
• Assignee: Tilman Hausherr
• Reporter: Tilman Hausherr
• Created: 12/Mar/18 17:02
• Updated: 24/Mar/18 09:41
• Resolved: 12/Mar/18 17:16

Description

I noticed that the file from PDFBOX-2035 needs 210 seconds on my new PC. The profiler shows that much time is lost in java.awt.geom.AreaOp.pruneEdges. A google search hit the linked SO issue. So I changed PageDrawer. Times on new PC with energy setting to maximum:

• PDFBOX-1350: 53 secs before, 12 secs after
• PDFBOX-2035: 210 secs before, 9 secs after
• all tests: 424 secs before, 247 secs after (the difference is mostly because of PDFBOX-2035 which prevents termnination of the test)
• all tests except the two: 246 secs before, 230 secs after