High latency when website is proxied

On Tuesday, 30 January, we got notified by our users (mostly located in germany) that our website got slow. After some investigation we guessed an issue with CF and disabled proxying which solved it.
Our staging environment goes through CF and is still slow

mtr -4 -w staging.sauspiel.de
Start: 2024-02-01T11:50:30+0100
HOST: iMac.fritz.box                         Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- fritz.box                               0.0%    10    2.4   3.4   2.4   5.3   0.8
  2.|-- p3e9bf238.dip0.t-ipconnect.de           0.0%    10    4.7   7.9   4.0  33.8   9.1
  3.|-- nyc-sb5-i.nyc.us.net.dtag.de            0.0%    10  106.6 106.5 105.0 107.7   0.8
  4.|-- 87.128.239.250                          0.0%    10  102.2 103.7 101.8 106.8   1.6
  5.|-- if-ae-0-2.tcore3.njy-newark.as6453.net 50.0%    10  111.6 110.9 110.1 111.7   0.8
  6.|-- 66.198.70.2                             0.0%    10  109.3 110.2 108.5 115.6   2.0
  7.|-- 199.27.132.36                           0.0%    10  103.8 104.6 102.7 108.1   1.8
  8.|-- 104.21.42.30                            0.0%    10  102.2 102.4 101.4 104.1   0.9
mtr -6 -w staging.sauspiel.de
Start: 2024-02-01T11:50:57+0100
HOST: iMac.fritz.box            Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- fritz.box                  0.0%    10    2.5   3.2   2.4   4.3   0.7
  2.|-- 2003:0:8801:d800::1        0.0%    10    8.3   6.0   4.6   8.3   1.5
  3.|-- 2003:3c0:1600:8000::1      0.0%    10  109.2 109.4 108.8 110.0   0.5
  4.|-- 2003:3c0:1600:800a::2      0.0%    10  113.0 115.8 111.7 135.3   7.1
  5.|-- 2001:418:0:5000::a9b       0.0%    10  108.9 111.4 108.7 124.9   4.9
  6.|-- 2400:cb00:16:3::           0.0%    10  112.5 113.7 112.2 119.1   2.1
  7.|-- 2606:4700:3032::ac43:c7b8  0.0%    10  113.0 112.6 108.3 115.5   1.9
curl https://staging.sauspiel.de/cdn-cgi/trace/
fl=626f136
h=staging.sauspiel.de
ip=2003:d3:974a:2300:7d6c:d894:9fba:a80f
ts=1706785266.06
visit_scheme=https
uag=curl/8.4.0
colo=IAD
sliver=010-tier1
http=http/2
loc=DE
tls=TLSv1.3
sni=plaintext
warp=off
gateway=off
rbi=off
kex=X25519

colo=IAD which means Ashburn, VA, United States as found in https://www.cloudflarestatus.com/
If Iā€™m understanding it correctly, the traffic is routed through US?

1 Like

Hi @holger1,

Please check this blog post.

Thank you.