driver.get('url')
navigationStart = driver.execute_script("return window.performance.timing.navigationStart")
responseStart = driver.execute_script("return window.performance.timing.responseStart")
domComplete = driver.execute_script("return window.performance.timing.domComplete")
 
backendPerformance_calc = responseStart - navigationStart
frontendPerformance_calc = domComplete - responseStart
 
print("Back End: %s" % backendPerformance_calc)
print("Front End: %s" % frontendPerformance_calc)

你可以用它来加载页面。不确定Java的方式。

JavascriptExecutor js = (JavascriptExecutor)driver;
js.executeAsyncScript("return window.performance.timing.navigationStart");

你可以测量持续时间。当你开始加载应用程序/页面时启动秒表。当最后一个元素被加载时停止它。

你可以使用stopwatch类找到加载主页的确切时间。使用下面的代码：
StopWatch loadTime =新建秒表（）;

driver.get("url");
    loadTime.start();
    
    boolean appLoaded = new WebDriverWait(driver, 30).until(
            ExpectedConditions.elementToBeClickable(MobileBy.xpath("any xpath of expected page"))).isDisplayed();
    
    loadTime.stop();
    
    System.out.println("is App loaded : " +appLoaded);
    long pageLoadTime_ms = loadTime.getTime();
    System.out.println(" Load Time: " + pageLoadTime_ms + " milliseconds");