How to Speed Up Selenium Tests by Tuning Page Loading Strategy?

Tuning Selenium to Bypass Slow Script Loading

Selenium's default behavior is to wait until a page fully loads before proceeding, which can become problematic when pages contain slow or unreliable scripts. To mitigate this issue, consider adjusting Selenium's page loading strategy.

The pageLoadStrategy property allows you to manipulate how Selenium handles page load events. By specifying the appropriate strategy, you can limit the time Selenium waits, block AJAX requests, and even disable script loading entirely.

Configure pageLoadStrategy for Different Browsers

Firefox:

from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

caps = DesiredCapabilities().FIREFOX
caps["pageLoadStrategy"] = "normal"  # full page load
# caps["pageLoadStrategy"] = "eager"  # interactive
# caps["pageLoadStrategy"] = "none"
driver = webdriver.Firefox(desired_capabilities=caps, executable_path=r'C:\path\to\geckodriver.exe')
driver.get("http://google.com")

Chrome:

from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

caps = DesiredCapabilities().CHROME
caps["pageLoadStrategy"] = "normal"  # full page load
# caps["pageLoadStrategy"] = "eager"  # interactive
# caps["pageLoadStrategy"] = "none"
driver = webdriver.Chrome(desired_capabilities=caps, executable_path=r'C:\path\to\chromedriver.exe')
driver.get("http://google.com")

pageLoadStrategy Options

• normal: Wait for the full page load, including scripts and AJAX requests.
• eager: Wait until the page is interactive, allowing Selenium to continue execution while scripts and AJAX still load asynchronously.
• none: Disable all script loading and AJAX requests, allowing Selenium to immediately proceed.

Note: The "eager" strategy is still under development for ChromeDriver implementations, so it may not be fully supported across all browsers.

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