Output the number of setHeader() operations per second

set-header-bench.js

'use strict';

const http = require('http');
const net = require('net');
const print = process._rawDebug;
const FIELDS = isNaN(process.argv[2]) ? 128 : process.argv[2] >>> 0;
const PORT = 8080;

const headers =
    'GET / HTTP/1.1\r\n' +
    'Host: localhost\r\n' +
    'Connection: keep-alive\r\n' +
    'User-Agent: node\r\n\r\n';

var req_cntr = 0;

const server = http.createServer(function(req, res) {
  req_cntr++;
  for (var i = 0; i < FIELDS; i++) {
    res.setHeader(`X-Filler${i}`, i);
  }
  res.end('');
});

server.listen(PORT, function() {
  print(`sending ${FIELDS} fields`);
  print();
  print('  header fields parsed per second:');
});

(function connect() {
  const client = net.connect(PORT, function() {
    this.setKeepAlive(true);
    this.write(headers);
  });
  client.on('data', function(chunk) {
    if (chunk.toString('binary').substr(chunk.length - 4) === '\r\n\r\n')
      this.write(headers);
  });
  client.on('end', function() {
    print('!!!end!!!');
    process.exit();
  });
}());

setInterval(function() {
  print(((FIELDS * req_cntr) / 3) >>> 0);
  req_cntr = 0;
}, 3000);