Hi, I have XnView as default F3 association for my file manager.
Whenever I open a .jpg file which is in a folder with ~526 other files (individual file size is ~5Mb, total dir size is 3.2Gb, machine is Dell Desktop with i7-4790 8 HT cores, 32Gb RAM, with Samsung SSD PM 871, which is very fast for everything else).
So file opens immediately, but when I press PgUp / PgDn it causes XnView to unexplainably freeze for 16-20 seconds, so that Windows 10 Pro x64 pro even prints (Not Responding) in title bar like in attached image.
Close/open of XnView process makes it freeze again.
It looks like it tries to scan all files in the directory.
When it's doing that, it seems to be occupying 2 full cores and then a 1 full core until it unfreezes according to ProcExp,
not much of I/O happening, and otherwise system is idle:
It seems to happen also on my relatively fast i7-6820HQ laptop.
For a measure it takes 12.5 seconds to copy these 500 pc / 3.2 Gbytes of files (with occasional mpg files) to 4Gb RAMdisk :
It started to happen quite a while ago, xnview was my favorite
Version I use is 2.39 from Nov 8 2016
It's an out of box install with no options touched by hand.
Why it could be freezing on PgUp/PgDn image switching?