60 ms cross-continent

Sat Jun 20 16:36:27 UTC 2020

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 at 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 at herrin.us
> https://bill.herrin.us/
>

-- 
Tim:>
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