Python program slows computer after being executed multiple times
Since the only times that it gets slow is when you are using idle and doing it a lot of times. It may just be idle and using a different editor like pycharm (Download here) will fix it.
If that doesn't work it doesn't really matter because you would only run it tons of times with idle while testing it and users wont run it nearly as much and they will run it with command prompt most likely.