http traffic slow

[TomBoehm]

In "some locations" http traffic is terribly slow.
I face this on client side AND with one server side installation.
The server side installation, where I get this symptom uses a dual 5G and DSL connection
The values below are from a road warrior to a server that usually works fine:
While
iperf3 -s -p 8000 and

iperf3 -p 8000 -c 10.0.7.6
Connecting to host 10.0.7.6, port 8000
[  5] local 10.121.122.247 port 52265 connected to 10.0.7.6 port 8000
[ ID] Interval           Transfer     Bitrate
...               
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.01  sec  2.50 MBytes  2.10 Mbits/sec                  sender
[  5]   0.00-10.09  sec  2.50 MBytes  2.08 Mbits/sec                  receiver

is OK .... with same port, but http traffic:

python3 -m http.server
Serving HTTP on 0.0.0.0 port 8000 (http://0.0.0.0:8000/) ...
172.18.0.2 - - [23/Apr/2026 10:25:17] "GET /testfile HTTP/1.1" 200 -

the result is:

curl http://10.0.7.6:8000/testfile > testfile
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  976k  100  976k    0     0  17071      0  0:00:58  0:00:58 --:--:-- 12942

And since we need http traffic to authenticate - that is slow too:

curl https://code.test.site/assets/index-iuvNiebc.js > index-iuvNiebc.js
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1108k  100 1108k    0     0  18930      0  0:00:59  0:00:59 --:--:-- 24366

The server side has no http traffic inspection.
My networking knowledge ends here ;-( maybe someone has an idea for me

[NHAS]

This is more of a support request than something being wrong with wag itself.