Regarding performance, I once had an experience that I never bothered to look into. I made a cool little interactive simulation in the p5js sandbox; ran flawlessly. I then copy pasted it into a codesandbox, and it was choppy and abysmal. I checked the version numbers and how it was being included and couldn’t see anything obvious. Maybe codesandbox has some isolation that is taxing? Like I said, never looked into it.