Re: 60 ms cross-continent

[Tim Durack <tdurack () gmail com>]

Speed of light in glass ~200 km/s

100 km rtt = 1ms

Coast-to-coast ~6000 km ~60ms

Tim:>

On Sat, Jun 20, 2020 at 12:27 PM William Herrin <bill () herrin us> wrote:

> Howdy,
>
> Why is latency between the east and west coasts so bad? Speed of light
> accounts for about 15ms each direction for a 30ms round trip. Where
> does the other 30ms come from and why haven't we gotten rid of it?
>
> c = 186,282 miles/second
> 2742 miles from Seattle to Washington DC mainly driving I-90
>
> 2742/186282 ~= 0.015 seconds
>
> Thanks,
> Bill Herrin
>
> --
> William Herrin
> bill () herrin us
> https://bill.herrin.us/


-- 
Tim:>