I have a gas stovetop, the big 5kW at full blast might do it in like 4-5 minutes (be generous with the olive oil, salt, blend it all, then do not stir at all, for like 2 min. Then stir up the cooked ones from underneath, regularly) I guess those induction abominations might do that too.
You can't fry onions on medium heat. Or yes it'll take 30 minutes.