Personally I have the impression that CCITT group 4 compressed PDFs are displayed very quickly, unless they are scanned at 3000 DPI... Can't say the same for JB

Personally I have the impression that CCITT group 4 compressed PDFs are displayed very quickly, unless they are scanned at 3000 DPI... Can't say the same for JBIG2 or JPEG/JPEG2000 based ones.