I'm putting together a little gphoto2 based script (for shooting a camera tethered and viewing the image asap on the screen of the computer instead of on the camera) and it finishes with displaying a jpeg (or the most recently added jpeg in a directory).
What I'm trying to find is the fastest jpeg displaying program out there...the less gui the better since it will be run from a script. So far I'm playing with xzgv, mirage and feh. The default viewer in F13 seems to be miserably slow compared to any of these options. I'm sure there's others out there.
Also, if someone has any hints about how to how to do a bash script that will close the previous open (or make it go to the most recent addition to a directory) it would be greatly appreciated. The most functionality I'm really looking for is speed and maybe the ability to go to the previous/next image with the arrow keys.