I’ve always found Jetbrains stuff really laggy, even when I tried Clion on my current maxed out 16” MBP, to be honest it’s one of the things that has always put me off their software. The text entry might not be laggy but the general UI has that “laggy Java” (sorry, I know it’s not a Java fault but I just associate it with Java GUI apps!) feel. Personally I find VS Code much more responsive on the whole.