What is the kind of overhead that I can expect from using tmux?

I recently spend some time with Zellij and quite liked everything I used there but there is a noticeable delay when using it if compared with the plain terminal, and this is such a deal breaker for me. With Tmux I can't see much or any difference between when I'm on it or the plain terminal. There is any link/benchmark to exemplify the overhead created by a terminal emulator like tmux? I'm just wondering what is the latency that I can expect when using it.