Slight delay when inputting notes

How are you trying to enter the notes? Can you give precise steps to reproduce? What OS, and what system specs (processor, RAM, etc)? And do you have particular large soundfonts loaded? I don't experience any appreciable delay with this score on my system, but it is on the large side, so it's expect there will be some slowdown on some operations. Generally, though, note input should be mostly independent of score size, only some other operations might slow down.

I do see those slight delays too