[MrFoof]

I believe James Cameron called it being turned into a, "meat cloud."

Absolutely occurred in under 30ms (upper bound). Possibly as quick as 2ms, and in all likelihood well under 10ms.

[marklubi]

Rough estimates, but at that depth, it’s around 450 atmospheres of pressure, or around 6,500 lbs per square inch. Pretty much instantaneous.

[weaksauce]

blink of an eye is 100ms on average so it was faster than the blink of an eye.

[chakintosh]

They died faster than their brain could process any pain.