Very slowly images' list scan

[ivan1]

When running xnview with a certain image filename, passed through command line, and there are 500..3500 images in this new folder, program hangs up for a half of a minute or more. On Q6600.
But when entering such folder manualy by using xnview' tree of files, and clicking on image's name immediately -- there is no delay and it's Ok.

[xnview]

In browser, which sort setting do you have?

[ivan1]

In browser, which sort setting do you have?

in TotalCommander & Explorer - by extention
in xnview - by type (but when by name - All ok)

When starting, first mode of xnview is 'fullscreen' or 'view picture in window'.
First image to be loaded - is loaded immediately and keys with menu are working, but when switching to second img by mouse wheel or pgDown - it hangs. Third and other images are rather without delay.

[xnview]

in xnview - by type (but when by name - All ok)

If you have a lot of files, 'sort by type' can be slow....

[obelisk]

it's probably because of the cache? Usually it's very slow to open a cached folder as it's not async..