[PDFBOX-4743] Long rendering time of fonts in a specific PDF

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.0.32, 3.0.3 PDFBox, 4.0.0
• Fix Version/s: 2.0.33, 3.0.4 PDFBox, 4.0.0
• Environment: Gentoo Linux, Java 8
• Assignee: Andreas Lehmkühler
• Reporter: Daniel Persson
• Created: 17/Jan/20 10:36
• Updated: 03/Oct/24 17:32

Description

Hi Team.

 

We have found a PDF that takes a long time to render images.

 

After some checking, we found that the one page takes more than 2 minutes to render, but if we remove the font information and render the PDF without text, it takes 3 seconds.

 

Just looking at the font information, it doesn't seem to be a lot of data. 3-5kb per font and there are only about seven fonts defined. So there must be something else that complicates things.

 

Best regards

Daniel

Issue Links

• relates to: PDFBOX-4718 OutOfMemoryError - during renderImageWithDPI