bug#46942: ci.guix.gnu.org is slow from my system

[Leo Famulari]

On Fri, Mar 05, 2021 at 11:22:17AM +0000, raid5atemyhomework via Bug reports 
for GNU Guix wrote:
> Downloading substitutes from ci.guix.gnu.org is slow from my two Guix-using 
> computers.
> 
> One is a pure Guix System install without any channels, the other one is a 
> foreign Guix install with the-channel-that-cannot-be-named.
> 
> 
> ```
> downloading from 
> https://ci.guix.gnu.org/nar/lzip/1bdldr80p39g1mjnh76xw6hmwqrrb8lz-wine64-6.0 
> ...
>  wine64-6.0  54.4MiB                                                          
>                                                                        
> 10KiB/s 01:55 [                  ]   2.1%
> ```

Sometimes we get reports like this, of strangely slow downloads from
ci.guix.gnu.org. They don't seem to depend on geography. They sometimes
happen to people who usually download quickly from ci.guix.gnu.org. So
far, we don't have any idea why they happen. But, it's not just you.

You are the first person to file a detailed bug report about it, if I
remember correctly (if!). If you'd like to help debug it, let us know,
but it would probably mean identifying your IP / location.