websocket_bencmark.md

Crystal vs Node.js Websocket Benchmark

Crystal 0.9.1 with Kemal

require "kemal"

ws "/" do |socket|
  socket.on_message do |message|
  end
end

Node.js v4.2.1 with ws

var WebSocketServer = require('ws').Server
  , wss = new WebSocketServer({ port: 3000 });

wss.on('connection', function connection(ws) {
  ws.on('message', function incoming(message) {
  });

});

Thor is used to run the benchmark.

thor -A 10000 http://localhost:3000

Platform	CPU Usage	Memory Usage
Crystal (Kemal)	1.85	11.2 MB
Node.js (ws)	38.95	906.3 MB

This benchmark was performed on a 2013 Late Macbook Pro with 2Ghz i7 and 8G ram.

P.S: Less is better