Purpleheart is definitely a tougher wood to cut but it can be done. You didn’t mention what thickness it was, and limiting yourself to 100 instead of full will definitely hinder you.
Full on a pro is different from full on a basic but on my pro I usually get through 1/8” purpleheart at about 180/full/1x. It can vary a bit but it’s right around there. It does char black though so if you use it in a box and want less noticeable finger joints you’ll have to cut it long and sand it down.
For example: