Script to get page initialisation average time.

pagespeed.js

/**
 * PhantomJS script to get page initialisation average time.
 * Using: ```$ phantom pagespeed.js http://mypage.com 10```
 **/

var _ = require('underscore');
var webpage = require('webpage');

var url = process.argv[2] || 'http://google.com';
var times = 5 || process.argv[3];
var i = 0;
var results = [];

function test() {

    phantom.clearCookies();

    var page = webpage.create();
    var t = Date.now();

    page.open(url, function(status) {
        if(status === "success") {
            results.push(Date.now() - t);
        }
        if (++i < times) {
            a();
        } else {

            // Result
            console.log('average', _.reduce(results,
                    function(memo, num) {return memo + num;}, 0) / (results.length === 0 ? 1 : results.length),
                    '(' + results.length + ')');
            phantom.exit();

        }
    });

}

test();