Benchmark Selenium script execution: WebDriver Classic vs. BiDi

selenium_js_benchmark.py

#!/usr/bin/env python3

"""Benchmark Selenium script execution: WebDriver Classic vs. BiDi"""

import timeit

from selenium import webdriver


NUM = 500

service = webdriver.ChromeService(executable_path="/usr/bin/chromedriver")
options = webdriver.ChromeOptions()
options.enable_bidi = True
driver = webdriver.Chrome(options=options, service=service)
driver.get("https://example.com")


def execute_classic():
    return driver.execute_script("return document;")


def execute_bidi():
    return driver.script.execute(
        "() => { return document; }",
    )


t_classic = timeit.timeit(execute_classic, number=NUM)
print("execute script with WebDriver Classic:")
print(f"  - time for {NUM} iterations: {(t_classic * 1000.0):.03f} millisecs")
print(f"  - average time per execution: {(t_classic / NUM * 1000.0):.03f} millisecs")
print()

t_bidi = timeit.timeit(execute_bidi, number=NUM)
print("execute script with WebDriver BiDi:")
print(f"  - time for {NUM} iterations: {(t_bidi * 1000.0):.03f} millisecs")
print(f"  - average time per execution: {(t_bidi / NUM * 1000.0):.03f} millisecs")
print()

print(f"WebDriver Classic is {(t_bidi / t_classic):.2f}X faster than WebDriver BiDi")