Is your feature request related to a problem? Please describe.

I have a velocity server with over 1000 players at peak times, and it would be useful if players are cached whenever they ping the server.

Describe the solution you'd like

A feature such as CleanMotD's to cache players; I'd use them but they don't support velocity:
https://github.com/2LStudios-MC/CleanMotD/blob/master/src/dev/_2lstudios/cleanmotd/bungee/listeners/ProxyPingListener.java

Describe alternatives you've considered

N/A

Additional context

N/A

Closing due to lack of response

It doesn't really look like they are "caching" anything, they are simply not sending the favicon to players who have already been sent it. I could add similar functionality to MiniMOTD but I have doubts that it will actually make any sort of performance difference. Sending a 64x64 png (which is cached in memory) over the network is not very heavy. Have you actually noticed the sending of these images causing performance problems?