@elswhrco the timer paragraph talks about how HISEScript isn't super efficient, so if you need a timer that executes more than once every 20ms or so, it's gonna be problematic.
it's referring to the on timer callback, which is a realtime, sample accurate timer that you start with Synth.startTimer(seconds).
It's a highly situational scenario in which you will need 100% accuracy in repetitive code execution, because it's mostly gonna be event-related code, as DSP isn't going to be done there.
For DSP, you should be doing it in ScriptNode/Faust/SNEX/RNBO anyway, as that works at C++ speeds.