When comparing feh vs MuPDF, the Slant community recommends MuPDF for most people. In the question“What are the best applications to use on a X11 window manager?” MuPDF is ranked 6th while feh is ranked 9th. The most important reason people chose MuPDF is:
It was written in C and opengl, so your hardware was used fully.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Loads up images extremely fast
Pro Minimalistic
Goes well with tiling window managers.
Pro Super fast
It was written in C and opengl, so your hardware was used fully.
Pro Vim-mode shortcut keys
Super easy to use with rapid response.
Pro Excellent for presentations
Pro Annotation capability
With mupdf-gl, you can do most of the annotations and comments.
Cons
Con Junky rescaling by default in WMs
Fixable by running these commands:
echo "alias feh='feh --scale-down --image-bg black & disown" >> ~/.bashrc
source ~/.bash_profile
But after entering those two commands for all users, feh works flawlessly, and is extremely responsive. Would definitely recommend.
Con No print option
Con No two page mode
Con Not enough functionality
If you want "minimal," you got it.