Whoaaaaaaa okay. Fastest rapper of all time is Korean, I guess.
I've always loved this dude. Check out the song "Loner". Probably on the sidebar of this video below. That is actually the song he is "world record speed rapping", just without the beat. The beat is awesome.
This is gnarly.
https://www.youtube.com/watch?v=7hcuXTGO66I