Just now while using Chrome with an infinite number of tabs and windows, it stopped responding with a colorful spinwheel. The computer is still working, but every other application moves 30x slower whereby every action I make will be delayed by ~2 seconds, even if its a simple click. I waited for about 10 minutes to unlag but its still the same.
I opened activity monitor and started quitting all Chrome subprocesses. After about 3 minutes, computer is completely fine now, but Chrome main process is still showing as not responding:
How do I investigate what's going wrong? And how can it be fixed?
(Btw, I remembered having a similar issue 2 months ago and I managed to fix that one after much googling, but I can't remember how I fixed it.)