Can anybody explain what the lag compensation is doing?

@toadofsky would you mind explaining lag compensation so that this argument can stop?

#21 https://lichess.org/blog/WOEVrjAAALNI-fWS/a-better-game-clock-history

#22 Maybe I'm too dumb, but I can't see how this blog post explain lag compensation :)

#23 That makes two of us. :)