monitor.js

var page = require('webpage').create(),
address, output, size;

if (phantom.args.length < 2 || phantom.args.length > 3) {
  console.log('Usage: ' + phantom.scriptName + ' URL filename');
  phantom.exit();
} 

var start = new Date();

address = phantom.args[0];
output = phantom.args[1];

page.viewportSize = { width: 900, height: 600 };

page.onLoadStarted = function () {
  var diff = new Date() - start;
  console.log('Load: start: ' + diff);
};

page.onLoadFinished = function (status) {
  var diff = new Date() - start;
  console.log('Load: finished: ' + diff);
  console.log('Page title is ' + page.evaluate(
                function () {
                  return document.title;
                }));
};

page.open(address, 
          function (status) {
            console.log('Loading: ' + address);
            if (status !== 'success') {
              console.log('Unable to load the address!');
            } else {
              window.setTimeout(
                function () {
                  console.log('Loaded successfully...');
                  page.render(output);
                  phantom.exit();
                }, 200);
            }
          });