I have got a humble spec PC - Intel Celeron G1610T 2.3GHz, GeForce GT 710 2GB DDR3 (Nouveau drivers), 8GB RAM.
The above Compton settings worked fine for removing video tearing but I still had some stutter when playing videos on YouTube etc.
I am a born tinkerer, so I decided to explore and test some of Compton's numerous settings, most are shown at https://github.com/chjj/compton/wiki/perf-guide
After many attempts I have come up with a setup which totally eliminates tearing and drastically reduces video stutter. As a suggestion, would it be possible to give the Compton manager the option of 3 startup modes which can be set with something like checkboxes.
1) Default - Basic Compton startup (should work on all machines)
2) Faster - compton --backend glx --paint-on-overlay --vsync opengl-swc (should work on most machines)
3) Fastest - compton --backend glx --unredir-if-possible --glx-no-stencil --glx-no-rebind-pixmap --glx-swap-method buffer-age --vsync opengl-swc (might need a reasonably modern video card)