如何使用Python查看Selenium中每个请求的时间和流量

Question

class IyS(unittest.TestCase):
    driver=webdriver.Firefox()
    driver.maximize_window()
    def Login(self):
        IyS.driver.get("url")
        IyS.driver.find_element_by_id("email_id").send_keys("email@gmail.com")
        IyS.driver.find_element_by_id("password").send_keys("password")
        IyS.driver.find_element_by_xpath(".//*[@id='loginBtn']").click()

IyS = IyS()
IyS.Login()

我想监控每个步骤的控制台的时间和流量..