Hi, We noticed something strange with haproxy. we have one haproxy node in front of a web server implemented inefficiently, such as loading 25 js files). Both servers are located in EU, when testing from EU, there is not difference in response time connecting to the web server directly or connecting through haproxy.
However, when testing it from US, because of the latency, it takes 7 seconds to load if connecting to the web server directly but 15 seconds if connecting through haproxy and this behavior is very consistent. We also tested from China and it takes 19 seconds directly but 30 seconds through haproxy. We have very simple haproxy.cfg, see below. Any idea why haproxy adds 10second in the latency case? Thanks Wei global daemon maxconn 10000 stats socket /var/run/haproxy.stat mode 666 level admin defaults mode http retries 3 timeout connect 300000ms timeout client 300000ms timeout server 300000ms option httplog log 127.0.0.1 local0 log 127.0.0.1 local1 notice option forwardfor option httpclose option http-pretend-keepalive frontend node_frontend maxconn 10000 backlog 10000 bind *:80 bind *:443 ssl crt /etc/haproxy/pem crt /data/certs/ acl is_websocket hdr(Upgrade) -i WebSocket acl is_websocket path_beg /socket.io acl is_app_521e2579d654b30000000550 hdr_beg(host) -i test.test.com use_backend websocket_app_521e2579d654b30000000550 if is_websocket is_app_521e2579d654b30000000550 use_backend node_app_521e2579d654b30000000550 if is_app_521e2579d654b30000000550 default_backend default backend default mode http server server0 127.0.0.1:7000 maxconn 20 backend node_app_521e2579d654b30000000550 mode http server server_52029d2d0d120104610bc722 172.31.29.16:1011 maxconn 4 backend websocket_app_521e2579d654b30000000550 mode http server server_52029d2d0d120104610bc722 172.31.29.16:1011 maxconn 1000 listen stats :8081 mode http balance roundrobin stats uri / server none 127.0.0.1
