Safari has been stalling when I load some websites. Github.com is the most reproducible. The page would load, but then my mouse would turn to a beach-ball and just get stuck until I close the tab with Github or whatever site seems to be causing it.
I am not running any extensions - to be honest I don't know what it could be. My boss is having the same issue as well. I have no issues with loading Github on Chrome.
Is anyone else having this issue? And is there any way to fix it or further diagnose it?
I am running macOS Sierra (10.12.1) on a Late 2014 Mac mini and Safari 10.0.1. It also happens on the Safari Technology Preview (Release 26, 10.2)
Thanks in advance!