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You can use Image to view your digital images and photos of many different formats.
I agree with you a lot of these app are just slow, and there ia no reason to use them when we have a lot of alternatives. I use as well vlc for videos and for photos I use ImageGlass which is fast and clean.
JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.