Erlang Chicago Boss JSON API test performance

I am documenting my test on erlang web framework, Chicago Boss and use it for backend API.
My setting for the database using Postgresql 9.2 using 1 table with 2 rows and 4 fields only and return the request using JSON.

I test the performance load using httperf on my debian 8 laptop.

# httperf --server 127.0.0.1 --port 8001 --uri /todo/list --rate 150 --num-conn 27000 --num-call 1

In this simple test, the same page is retrieved repeatedly. The rate at which requests are issued is 150 per second. The test involves initiating a total of 27,000 TCP connections and on each connection one HTTP call is performed (a call consists of sending a request and receiving a reply)

 The result should be like this if access from browser :

{
  "todos": [
    {
      "id": "todo-1",
      "task": "learning",
      "status": "not done",
      "owner": "Voldomore"
    },
    {
      "id": "todo-2",
      "task": "erlang",
      "status": "not done",
      "owner": "Potter"
    }
  ]
}

and the result of httperf : 

httperf --client=0/1 --server=127.0.0.1 --port=8001 --uri=/todo/list --rate=150 --send-buffer=4096 --recv-buffer=16384 --num-conns=27000 --num-calls=1
httperf: warning: open file limit > FD_SETSIZE; limiting max. # of open files to FD_SETSIZE
Maximum connect burst length: 1

Total: connections 27000 requests 27000 replies 27000 test-duration 179.999 s

Connection rate: 150.0 conn/s (6.7 ms/conn, <=13 concurrent connections)
Connection time [ms]: min 3.9 avg 6.6 max 85.4 median 5.5 stddev 4.5
Connection time [ms]: connect 0.0
Connection length [replies/conn]: 1.000

Request rate: 150.0 req/s (6.7 ms/req)
Request size [B]: 71.0

Reply rate [replies/s]: min 149.8 avg 150.0 max 150.2 stddev 0.1 (36 samples)
Reply time [ms]: response 6.6 transfer 0.0
Reply size [B]: header 125.0 content 673.0 footer 0.0 (total 798.0)
Reply status: 1xx=0 2xx=27000 3xx=0 4xx=0 5xx=0

CPU time [s]: user 55.66 system 124.11 (user 30.9% system 68.9% total 99.9%)
Net I/O: 127.3 KB/s (1.0*10^6 bps)

Errors: total 0 client-timo 0 socket-timo 0 connrefused 0 connreset 0
Errors: fd-unavail 0 addrunavail 0 ftab-full 0 other 0

What i see are 179 seconds (3 minutes) to complete all the request, and with basic setup. only have a model and controller to list. I want to try it using Django Rest Framework also later on to see how django rest framework performance. But surely Erlang faster. Just want to know how many can be handled by DRF.

Posted in: Erlang