[PDFBOX-5310] Slow rendering for specific PDF File with small chunks 16x8

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.24
• Fix Version/s: 2.0.25, 3.0.0 PDFBox
• Component/s: Rendering
• Labels: optimization
• Assignee: Tilman Hausherr
• Reporter: Oliver Schmidtmer
• Created: 29/Oct/21 16:58
• Updated: 17/Dec/21 06:50
• Resolved: 04/Nov/21 18:38

Description

I have another PDF with many small chunks. From PDFBOX-5051 we see chunk sizes of either 1px with or height.

This PDF contains chunks with a size of ~16x8 and rendering times could also be improved by a huge factor if the conditions at https://github.com/apache/pdfbox/blob/283d6f8cdd1695ebe8515355b17ddea7527b5f96/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/color/PDColorSpace.java#L349 are changed accordingly.

Issue Links

• relates to: PDFBOX-5051 Slow rendering for specific PDF file