When viewing a directory of images and scrolling through with the arrow keys, it would be great if gwenview could implement (via option) some intelligent pre-buffering to enable faster and smoother switching. It could pay attention to the general "direction" of travel the user is moving in, and buffer X images in that direction, with Y in the other direction as well. Thanks for considering it.
+1 for this, absolute must-have... even most web-based photo viewers have it.