socket.io slow response after using nginx

Question

I have used my local setup without nginx to serve my node.js application, I was using socket.io and the performance was quite good.

Now, I am using nginx to proxy my request and I see that socket.io has a huge response time, which means my page is getting rendered fast, but the data rendered by socket.io is order of magnitude slower than before.

I am using NGINX 1.1.16 and here is the conf,

gzip  on;

server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;

    access_log  logs/host.access.log  main;

    location / {
        proxy_pass http://localhost:9999;
        root   html;
        index  index.html index.htm;
    }

Even though everything is working, I have 2 issues,

1. socket.io response is slower than before. With NGINX, the response time is around 12-15sec and without, it's hardly 300ms. tried this with apache benchmark.

2. I see this message in the console, which was not there before using NGINX,

   [2012-03-08 09:50:58.889] [INFO] console -    warn  - 'websocket connection invalid'
   

Answer 1

You could try adding:

proxy_buffering off;

See the docs for info, but I've seen some chatter on various forums that buffering increases the response time in some cases.