Ashley
(Disclaimer: Specs are i5-6600k, GTX 1080ti, 16gb RAM. GPU setting in C3 on high performance. Dark theme.)
I find that in my larger event sheets, C3 has a hard time keeping up. There's a distinct delay to every action - Highlighting or rearranging events, opening the action or condition window, clicking OK or cancel on any expression window, etc. all takes up to 0.5 seconds per. Said event sheets aren't even that big (300-800 events).
I'm posting to see if others have this issue, if I need to report a bug, or if the event sheet editor just needs some optimizing and if there are plans to do so.
Technically I could break down the event sheets into smaller ones and use a bunch of includes, but I shouldn't have to. I prefer the setup I have here and used with no issues in C2.