Move tool very slow

[Photoniker]

I switched to a Linux a couple of month ago (Mint 22.1/Cinnamon) and so far everything is going reasonably well. Coming from Win10 and doing a good deal of photo editing, the only fly in the ointment is that I have to give up on Affinity Photo (doesn't run under Wine for me, so still dual booting for that purpose). 

Naturally, I'm looking into GIMP as a replacement and I have installed the 3.0 RC3 flatpak. But there's a bit of a hiccup that bothers me to no end and keeps me from making a serious attempt at starting to learn the software: when I load an image and want to move it around with the Move tool, it is very slow (from dragging the mouse a small amount to the image jumping into position, it takes about 2 seconds). Other tools, like the paint brush or healing brush seem to work quick and without delay (AMD Ryzen 5700, 64 GB Ram, NVME drive).

I searched around for a solution and came across some posts discussing GIMP being slow, but none of that really applied to my situation. I tried uninstalling and re-installing the flatpak, and I played around with the Tile Cache Size (set it to 32 GB, half my system RAM), but all to no avail. The same image (a roughly 6000 x 4000 jpg) loaded into Krita can be moved around smoothly and without any delay.

Would appreciate any pointers what else to look into.

[Ofnuts]

Is you system on Wayland or X11? On my Ubuntu 24.04 with X11, there is small lag when I move a 32Mpix layer across a 2560x1440 screen, but nothing like 2 seconds, on either 2.10.34 or 3.00RC3.

The distributed 3.00 RCs may be compiled with little optimization and some debug options(*), so may be try the 2.10 flatpak which could be more representative of the speed.

(*) I compile my own and I can't be sure that I'm using the same compile options as the distributed version.

[Photoniker]

Thanks! Excellent pointer. Just installed the 2.10 flatpak, loaded the image ,and it's moving around just fine.
Given that 3.0 seems to have quite a few improvements/changes compared to 2.10, I guess, I'd be better off to wait for the flatpak of the final 3.0 release.

[Photoniker]

Btw, I installed the 3.0.0 final, but that didn't make much of a difference. I am however on X11 and when I temporarily switched to Wayland the move tool got considerably smoother and faster. Unfortunately, Wayland on Mint is still experimental and, in my case, leads to all sorts of wonkiness.