RAW photos very slow in Gwenview

Is there a way to speed up RAW photos load time in Gwenview - it takes up to 5 seconds just to show one photo.
Thank you.

Difficult to say no info raw image sizes Vs computer age and specs, cpu, ram, swap ?

It is slow not because of a hardware. I am also using windows program “fast stone viewer” in “bottles” and it opens raw photos in an instant. Tried other image viewers like “PhotoQT”, “gthumb” and they are also as slow as Gwenview. Maybe my system needs a special driver for RAW?

I uninstalled Gwenview and now I use Nomacs (I think it is the fastest/best image viewer for Linux).