Comment by ycombinatrix
14 hours ago
Are you buffering your output? Doing one syscall (write) for each client in a server for each keystroke is a significant amount of IO overhead and context switching.
Try buffering the outgoing keystrokes to each client. Then, someone typing "hello world" in a server of 50 people will use 50 syscalls instead of 550 syscalls.
Think Nagle's algorithm.
I'm somewhat buffering right now - Everytime the current turn player types I buffer their input on the backend, and I have a job setup that broadcasts typing events every ~200ms using this buffer.
I could increase this interval, but I'd like to keep it as short as I can afford to to keep that realtime feel (i.e. other players can see what the current turn player is typing).