Question regarding a calibrated display profile

[Stuntflyer]

Does IMatch by default show nef's, tiff's and jpg's, for example, using the display profile? Also, I see that there is a preference "enable color management for thumbnails". I'm not sure if this should be on or off if I want to see the files using my display profile.

[Mario]

IMatch is fully color-managed.
Color management for thumbnails is off by default for performance reasons. This is an old setting.
When I introduced it in 2001, computers could run into performance trouble when IMatch asked Windows to color-manage thumbnails. With today's computers, it should not make much of a a difference.

[Stuntflyer]

Thanks! If there is any difference, I can't see it.

[Mario]

Thanks! If there is any difference, I can't see it.

You mean for thumbnails?
At that small size you need to use extreme profiles to see any difference. sRGB/AdobeRGB/ProPhoto RGB and a "normal" monitor profile won't show much of a difference for thumbnails. Which is why CM is off by default, in favor of slightly faster loading and display. CM is always on in the Viewer, Quick View Panel etc.

[Stuntflyer]

Yes, I was thinking of thumbnails. I will leave CM off now, knowing it's always on in the viewer.