Question Network ping calculation

What is the right way to calculate ping between client and server?

 

There does not seem to be a built-in way to do it. The way I do it myself is to have a coroutine running on each player object that every 0.1 seconds notes the time, calls a ServerRpc that immediately calls a ClientRpc on the same client, where the time is again noted and the difference stored (the round-trip time, RTT). The ping is then half the average of the last N RTT measures, where I've set N=30 (so ~3 seconds). At the same time, the server runs a coroutine that does the opposite (call a ClientRpc that calls a ServerRpc) so the server knows the ping to every client.

 

Afaik netcode already syncs local time to server, so

LocalTime - ServerTime

should give you proper ping value, no?

 

That also works, yes – although this seems to be averaged over a longer length of time, and adds a tick from what I've seen, so depending on your application you'd subtract 1/(tick rate) (so for a tick rate of 50, you'd subtract 0.02 seconds).

 

LocalTime - ServerTime 

will give you a more accurate value for how the ping will "feel" like for a player when they move via NetworkTransform, so if you want to display a number to the player I'd recommend to use that one.

 

Isn't that only true for interpolated movement?

 

Should i use (LocalTime - ServerTime).Tick or (LocalTime - ServerTime).Time to get milliseconds of a ping?

UPD: I used (LocalTime - ServerTime).Tick and it feels like a proper thing to go with