6 Milliseconds From Facebook
I use chrony to keep my home linux server synced with public NTP servers. It’s fun to watch which servers have the lowest latency and estimated error. For me the lowest latency is Facebook’s Public NTP. It’s easy to think time3.facebook.com has the highest estimated error. But no the unit there is us or μs meaning microseconds, so this is 6.4 milliseconds. All this on the cheapest cable internet connection available. :) ...