Caddy vs SSLDocker vs Nginx , which is the best suitable web server for your vps ? I tested their performance with step by step tutorial

1. I tested them on RAM 1 GB vps, i use hey 1 send requests 
 

# ./hey -n=20000 -c=5 [url=https://mydomain.com/]https://mydomain.com/[/url]

2. Caddy results:
 
 
 

Summary:

  Total:    64.9214 secs

  Slowest:  0.7156 secs

  Fastest:  0.0031 secs

  Average:  0.0161 secs

  Requests/sec: 308.0650



Response time histogram:

  0.003 [1] |

  0.074 [19888] |∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎

  0.146 [2] |

  0.217 [2] |

  0.288 [2] |

  0.359 [90]    |

  0.431 [1] |

  0.502 [11]    |

  0.573 [1] |

  0.644 [1] |

  0.716 [1] |

 
4. SSLDocker results:
 

Summary: 

  Total:    63.0618 secs 

  Slowest:  0.4883 secs 

  Fastest:  0.0030 secs 

  Average:  0.0156 secs 

  Requests/sec: 317.1490 



Response time histogram: 

  0.003 [1] | 

  0.052 [19865] |∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎ 

  0.100 [1] | 

  0.149 [2] | 

  0.197 [1] | 

  0.246 [0] | 

  0.294 [15]    | 

  0.343 [95]    | 

  0.391 [0] | 

  0.440 [2] | 

  0.488 [18]    | 

 
5. Nginx （openresty） results:

Summary:

  Total:    57.8501 secs

  Slowest:  0.0523 secs

  Fastest:  0.0029 secs

  Average:  0.0144 secs

  Requests/sec: 345.7212



Response time histogram:

  0.003 [1] |

  0.008 [539]   |∎∎

  0.013 [4327]  |∎∎∎∎∎∎∎∎∎∎∎∎∎

  0.018 [13150] |∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎∎

  0.023 [1397]  |∎∎∎∎

  0.028 [404]   |∎

  0.033 [120]   |

  0.037 [35]    |

  0.042 [18]    |

  0.047 [4] |

  0.052 [5] |

 
6. Requests per second (RPS)

Caddy 308 < SSLDocker 317 < Nginx 345

Nginx and SSLDocker have better performance
 
Caddy config:

mydomain.com {

    gzip

    proxy  / 127.0.0.1:8999

}

mydomain2.com {

    proxy  / 127.0.0.1:8888

}

SSLDocker config:

{

  "Email": "[email protected]",

  "GzipOn": true,

  "Http2https": true,

  "MaxHeader": 10,

  "Certs": "certs",

  "ProxyItems": [

    {"Host": "mydomain.com", "Target": "[url=http://localhost:8999"]http://localhost:8999"[/url]},

    {"Host": "mydomain2.com", "Target": "[url=http://localhost:8888"]http://localhost:8888"[/url]}

  ]

}

Nginx config:
 

server {

    listen 443;

    server_name mydomain.com;



    ssl on;

    ssl_certificate /root/ssl/chained.pem;

    ssl_certificate_key /root/ssl/domain.key;



    ssl_session_timeout 5m;



    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

    ssl_ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA;

    ssl_prefer_server_ciphers on;



    location ^~ /.well-known/acme-challenge/ {

        alias /var/www/myapp/;

        try_files $uri =404;

    }



    location / {

        proxy_pass_header Server;

        proxy_set_header Host $http_host;

        proxy_redirect off;

        proxy_set_header X-Real-IP $remote_addr;

        proxy_set_header X-Scheme $scheme;

        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_pass [url=http://127.0.0.1:8999;]http://127.0.0.1:8999;[/url]

    }

}

 
So  When should you use caddy and ssl docker?
 
my answer: if you run multiple websites,and each website use https .if you think it's hard and complex to config https ,you should use caddy and SSLDocker, they  would auto generate ssl . Nginx is stable and mature , you can search lots of solutions when you meet issues.