Default runs of Lighthouse load a page as a "new user". It needs someone to prepare the pages that are behind authentication to analyze the performance.
The Lighthouse team provides a way to achieve this via puppeteer. However, this article explains how it can be achieved with Selenium.
The main idea is to create a WebDriver instance with a remote-debugging-port and then make Lighthouse target the same port to measure the performance
How to?
- Initialize a driver with remote-debugging-port and keep it alive.
from selenium import webdriver
from selenium.webdriver.edge.options import Options
from webdriver_manager.microsoft import EdgeChromiumDriverManager
from selenium.webdriver.edge.service import Service as EdgeService
edge_options = Options()
edge_options.add_experimental_option('detach', True)
edge_options.add_argument('--remote-debugging-port=9000')
driver = webdriver.Edge(service=EdgeService(
EdgeChromiumDriverManager().install()), options=edge_options)
- Now use selenium to login to your website. For this article, facebook is taken as an example.
driver.get('https://www.facebook.com')
emailInput = driver.find_element(By.XPATH, '//input[@id="email"]')
passInput = driver.find_element(By.XPATH, '//input[@id="pass"]')
email = os.getenv('email')
password = os.getenv('password')
emailInput.send_keys(email)
passInput.send_keys(password)
submitButton = driver.find_element(
By.XPATH, '//button[@type="submit" and @name="login"]')
submitButton.click()
- Now all pages behind authentication should work with Lighthouse. The catch here is the
port. It targets the same port in which the WebDriver was exposed with Selenium.
lighthouse "https://www.facebook.com"
--port=9000
--preset=desktop
--output-path='./report.html'
--view
Top comments (0)