It looks nice but eats CPU like hell.. I guess it shouldn't be like this taking into account that it pans at around 3 frames per second (that's how it is perceived by the naked eye)  ;)

Thanks for enlightening me on this Dimkir, I think it's tat I remove the 'JS' suffix from the Github repo as it very slow on the browser :) You can actually try the desktop versions of the sketch which is also available from the same repo as executables,  https://github.com/hamzeen/PanoramaJS. I can tell you the desktop versions are very smooth that I trusted it will be good on the browser too. Yet, it didn't turn out that way.. :(

I compared performance with example 3D processing sketches, and looks like 

By the way there're few really 360 good panorama images licenced under CC BY which you may be interested to play around.