bench.sh

#!/bin/bash

i="0"

while [ $i -gt -1  ]
do
  i=$[$i+1]
  echo $i
  (
    node bot.js ws://localhost:5000
  ) &
  sleep 1
done

wait

bot.js

import WebSocket from 'ws'

function rand(lim) {
  return Math.floor(Math.random() * lim)
}

function sample(arr) {
  return arr[rand(arr.length)]
}

function think(state) {
  const dirs = ['up', 'down', 'left', 'right']
  return ["MOVE", sample(dirs)]
}


console.log('Starting')
const ws = new WebSocket(process.argv[2])

ws.on('open', function() {
  console.log('Connected')
})

ws.on('end', function() {
  console.log('Disconnected')
})

ws.on('message', function(data) {
  const msg = JSON.parse(data)
  const state = msg.state
  const cmd = think(state)
  ws.send(JSON.stringify(cmd))
})