In 2:44:10 to be absolutely precise. Bloody Hell, the game has only been out for a week!
The speed-runner in question is Elajjaz and this record is an all-boss run. You can't watch the record in all it's glory just yet, but he is streaming as we speak and most people in the know believe he'll break the record again. I didn't watch the record being broken because spoilers, but apparently he should be able to take about 15 minutes off his time using current strategies.
I quickly checked to see — he's roughly one hour into his current run at time of writing (8.40am).
It is insane just how quickly — as a community — we go from playing video games like normal people to speed-running them like goddamn alien, video game gods. Is the cycle faster than before, or is it my crusty old imagination? It's kind of terrifying. Almost makes me feel as though I should hurry up and finish the game already.
I'm going to have to restrain myself. I don't intend to watch any part of these runs until I've finished my own playthrough, but I also really enjoy watching speed runs of games I love, so I need to get cracking!