Time difference between leveling with and without heirlooms

[Xevon-stormrage (Xevon)]

There’s a guy that did a comparison to the difference with/without heirlooms.

50% exp is slower than 20% exp by about 8 minutes for 111-120 (graph and numbers inside)

[268 votes and 122 comments so far on Reddit] For those of you who don’t know me, I’m DesMephisto, I run a speed leveling discord with over 2300 members, I have the world record for fastest 20-120 as a non monk, and you’ve seen my routes for 20-100 in Azeroth Auto Pilot. I’ve been trying to showcase that heirlooms are broken for a while now and need to be buffed. We were dismissed because there was only a fixation on the azerite traits, which obviously do very little damage. However the primary…