SFT - Stands for "Scratch Feature Tests" This is a simple test to do a lot of calculations on scratch to test whether it can use multiple threads on the computer or not. You can check if it is using if it is using multiple threads by checking on task manager whether multiple cores are being used, or a single one is maxed out.
Results: Scratch is not multithreaded If you check any other project online, they may say that it is, but when you do a simple test to max out the performance, it shows that they are not capable of running on multiple threads. This multithreading tests also provide the same results on TurboWarp To my knowledge, there are also no other ways to do multithreading within scratch, so this concludes, to my knowledge, that there is no way to multithread an app in scratch.