Q.What are the reasons for my bot to slow down in performance?
A. You can think of a several reasons but the first place you should look is the memory consumption by the apps involved in your bot.
Also, when you are running a longer duration bot from "Test Run" menu of STU, it can slow down the performance because, by default, PAM is set to take screenshots every 200-300ms (roughly 3-4 times a second) for debug purposes. If no screenshots are needed, please go to the PAM settings and change the screenshot option to False. (see below.)