That's a "how many trees are in a forest?" kinda question...  This comes up a lot because it's a confusing topic, but basically, multithreading will help you when you have either a lot of toolpaths to process at once or when your single toolpath can be broken up into logical pockets to be calculated simultaneously.  If you're doing simple parts that primarily consist of one area, you're not going to see much benefit from multithreading.   For a really quick and dirty example, usin