XnView Software

When i pan when zoomed in, the program becomes ridiculously slow and laggy.

It's sorta like the hand is lagging behind the image while panning.

Anyone has the same issue?

how to reproduce?

Zoom in on a large image and pan. Only happens on my 3840×1200 monitor.

could you post some screenshots?

I can confirm the same behaviour, XnView is extremely laggy, when panning zoomed large image (actually not that large, 10MPx).

I can also confirm, that it happens only on large 4K monitor, connected to my Mac M1 laptop.

It does NOT happen on built-in retina display.

There is really nothing to screenshot, just open a 2MB jpeg file, zoom in 3 or 4 times and then panning becomes extremely slow, both keyboard panning and by mouse in the small image.

Other than this the software is just amazing.

Okay, I just verified, that the image doesn't even have to be large, it just has to be zoomed to 400% and more... (start being laggy but still usable around 250% zoom).


XnView MP MacOSX
Version 1.4.3 64bits (Feb 25 2023)
(but it is around since I have been using XnView - for about a year ago, when I transitioned to MacOS)

YangombiUmpakati wrote: Wed Mar 22, 2023 5:46 pm It does NOT happen on built-in retina display.

always on external screen?

xnview wrote: Thu Mar 23, 2023 12:33 pm

YangombiUmpakati wrote: Wed Mar 22, 2023 5:46 pm It does NOT happen on built-in retina display.

always on external screen?

yes, always on external screen. 

I can confirm this still is the case, even on powerful M3 Max processor.