def measure_page_performance_time(driver, tries_count, url):
    average = 0
    print "url: ", url
    for n in range(tries_count):
        driver.get(url)
        stext = driver.execute_script(
            "return ( window.performance.timing.loadEventEnd - window.performance.timing.navigationStart )")
        average = average + int(stext)
        print "trying ", n + 1, " time", "........Value is: %s" % float(float(stext) / 1000), "seconds"

    total_load_time = (float(float(average) / float(tries_count)) / 1000)

    if total_load_time < TIME_THRESHOLD:
        warning_msg = " - OK"
    else:
        warning_msg = "!!!WARNING!!! THIS PAGE PERFORMANCE IS TOO SLOW"

    print "||url: ", url, "AVERAGE is: %s" % total_load_time, "seconds" + warning_msg + "||"
    print ""