JS function that will curl a server asynchronously for each element in an array ([1,2,3] = 3) and log out the request/response times

curl-format.txt

    time_namelookup:  %{time_namelookup}\n
       time_connect:  %{time_connect}\n
    time_appconnect:  %{time_appconnect}\n
   time_pretransfer:  %{time_pretransfer}\n
      time_redirect:  %{time_redirect}\n
 time_starttransfer:  %{time_starttransfer}\n
                    ----------\n
         time_total:  %{time_total}\n

network-stess-test.js

/* 
example call:
var totallyNotADdosScript = require('./network-stress-test').processLoop;
totallyNotADdosScript(10, 'curl -w "@curl-format.txt" -o /dev/null -s "localhost:4000"');
This will send 10 requests and log request/response times for each when completed.
*/

var exec = require('child_process').exec;

function curlRequest (i, url) {
  exec(url, function (_err, stdout, _stderr) {
    console.log(`----------- start:${i} -------------`);
    console.log(stdout);
    console.log(`----------- done:${i} --------------`);
  });
}

function processLoop(iterations, url) {
  const items = Array.from(Array(iterations), (_x,i) => i);
  setTimeout(function() {
    curlRequest(items.shift(), url);
    if (items.length > 0) {
      setTimeout(arguments.callee, 25);
    }
  }, 25);
}

module.exports = { processLoop };