Re: Do substitutes download slowly for you? / Speeding up substitute delivery/mirrors

[Ludovic Courtès]

Andreas Enge <andreas@enge.fr> skribis:

> I am in France with a 100Mb/s FTTH link, and download is fast from all
> of the mirrors.
> FR  5,59MB/s    in 39s

Only?  I’m in Bordeaux :-) and from my workplace’s fast network I get
more than 10x more:

--8<---------------cut here---------------start------------->8---
$ wget -O/dev/null 
https://bordeaux.guix.gnu.org/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0
--2023-05-26 17:59:38--  
https://bordeaux.guix.gnu.org/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0
Resolving bordeaux.guix.gnu.org (bordeaux.guix.gnu.org)... 185.233.100.56, 
2a0c:e300::58
Connecting to bordeaux.guix.gnu.org 
(bordeaux.guix.gnu.org)|185.233.100.56|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 208615205 (199M) [text/plain]
Saving to: ‘/dev/null’

/dev/null                100%[================================>] 198.95M  
75.0MB/s    in 2.7s    

2023-05-26 17:59:41 (75.0 MB/s) - ‘/dev/null’ saved [208615205/208615205]
--8<---------------cut here---------------end--------------->8---

The others are below but not too bad:

--8<---------------cut here---------------start------------->8---
$ wget -O/dev/null 
https://bordeaux-us-east-mirror.cbaines.net/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0
--2023-05-26 18:01:03--  
https://bordeaux-us-east-mirror.cbaines.net/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0
Resolving bordeaux-us-east-mirror.cbaines.net 
(bordeaux-us-east-mirror.cbaines.net)... 5.161.49.48
Connecting to bordeaux-us-east-mirror.cbaines.net 
(bordeaux-us-east-mirror.cbaines.net)|5.161.49.48|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 208615205 (199M) [text/plain]
Saving to: ‘/dev/null’

/dev/null                100%[================================>] 198.95M  
17.6MB/s    in 12s     

2023-05-26 18:01:16 (16.1 MB/s) - ‘/dev/null’ saved [208615205/208615205]

$ wget -O /dev/null 
https://bordeaux-singapore-mirror.cbaines.net/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0
--2023-05-26 18:02:14--  
https://bordeaux-singapore-mirror.cbaines.net/nar/lzip/078vr3r8mn3yrwzwxw64hmcyshic9p3q-stellarium-0.21.0
Resolving bordeaux-singapore-mirror.cbaines.net 
(bordeaux-singapore-mirror.cbaines.net)... 
2401:c080:1400:71df:5400:4ff:fe73:757d, 64.176.80.78
Connecting to bordeaux-singapore-mirror.cbaines.net 
(bordeaux-singapore-mirror.cbaines.net)|2401:c080:1400:71df:5400:4ff:fe73:757d|:443...
 connected.
HTTP request sent, awaiting response... 200 OK
Length: 208615205 (199M) [text/plain]
Saving to: ‘/dev/null’

/dev/null                100%[================================>] 198.95M  
6.63MB/s    in 34s     

2023-05-26 18:02:49 (5.88 MB/s) - ‘/dev/null’ saved [208615205/208615205]
--8<---------------cut here---------------end--------------->8---

Substitution is often not network-bound though:

  https://guix.gnu.org/en/blog/2021/getting-bytes-to-disk-more-quickly/

Ludo’.