Pass the beta version of Shadowlands in less than 3 hours?

“New World Record? 10-50 /played 2hrs 53m Was boosted in TBC Dungeons; Ramparts 10-20 Botanica 20-50 I was in Chromie Time & the booster (level 50) wasn’t. The Dungeon continued to scale for me but stayed at level 30 for him the entire time, which is the new Level Cap of TBC.”

World of Warcraft: Shadowlands has a new high-speed runner that has passed the entire beta version of Shadowlands, starting at 10-50 levels in less than 3 hours. This is pretty fast and how is it even possible?

By the way, towards the end of his” run”, he averaged one level every 6 minutes and used his method, which he described in his blog.