[valorin]

Typically, PDFs use less space on disk which will result in less disk I/O.

What about a 300-400 page Real Book PDF?
One of them is a lot larger then, say, 12 single page PNG files.

But I guess, it's still only loading the PDF once, while there are multiple PNG files to be loaded. Once it's loaded them from disk, it's all about processing, and I assume a setlist loads as much as possible when you first open it?

I might have to do some comparisons :-)