Large memory usage when rendering a PDF

[Jeroen Bobbeldijk]

Hi,

I have a PDF that uses a lot of memory to be rendered, opening up the PDF in Chrome also makes it very slow.

I ran the PDF through pdfium_test and created this Valgrind dump:

However, it sadly doesn't really show what's causing this memory consumption.

What would be the best method to research this specific PDF?

[Jeroen Bobbeldijk]

Sorry about that, that seems to be a red herring, this memory consumption happens on any PDF.

It rather seems to be a CPU usage issue which is causes the slow down. I will do some more research but any pointers to debugging such issues would be helpful.

[Jeroen Bobbeldijk]

Compared to a normal PDF, in this one a huge amount of time is spent on shading it seems. Other viewers like PDF.js render it fine. It's from Adobe Illustrator, so it might contain some odd effects?

I think this one is a bit too complicated for me to fix myself, anyone I can share the PDF with privately?

[Lei Zhang]

This sounds like a good candidate for a bug report. Care to file one?

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[Jeroen Bobbeldijk]

Sure, but I don't think I'm able to describe the issue very well...