python：获取访问访问时的响应时间

import time
import os
from datetime import datetime
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWaitdef get_clear_browsing_button(driver):
"""Find the "CLEAR BROWSING BUTTON" on the Chrome settings page."""
return driver.find_element_by_css_selector('* /deep/ #clearBrowsingDataConfirm')def clear_cache(driver, timeout=60):
"""Clear the cookies and cache for the ChromeDriver instance."""
# navigate to the settings page
driver.get('chrome://settings/clearBrowserData')
# wait for the button to appear
wait = WebDriverWait(driver, timeout)
wait.until(get_clear_browsing_button)
# click the button to clear the cache
get_clear_browsing_button(driver).click()
# wait for the button to be gone before returning
wait.until_not(get_clear_browsing_button)"""
Use Selenium to Measure Web Timing
Performance Timing Events flow
navigationStart -> redirectStart -> redirectEnd -> fetchStart -> domainLookupStart -> domainLookupEnd
-> connectStart -> connectEnd -> requestStart -> responseStart -> responseEnd
-> domLoading -> domInteractive -> domContentLoaded -> domComplete -> loadEventStart -> loadEventEnd
https://www.w3.org/TR/navigation-timing/#sec-window.performance-attribute
"""
def access_url(driver, url):
# clear_cache(driver)
driver.get(url)
navigation_start = driver.execute_script("return window.performance.timing.navigationStart")
load_end = driver.execute_script("return window.performance.timing.loadEventEnd")
return load_end - navigation_start;def test_url(driver, log_file, url, count):
data = []
for idx in range(count):
load_time = access_url(driver, url)
data.append(load_time)
soted_data = sorted(data)
min_val = soted_data[0]
mid_val = soted_data[count//2]
max_val = soted_data[-1]
avg_val = sum(data)/count log_file.write("test '%s' %d times min:%d mid:%d max:%d avg:%d data:%s\n" %
(url, count, min_val, mid_val, max_val, avg_val, str(data)))if __name__ == "__main__":
pwd_path = os.getcwd()
options = webdriver.chrome.options.Options()
#options.add_argument("--load-extension=" + os.path.join(pwd_path, "Adblock-Plus_v1.13.4"))
options.add_argument("--user-data-dir=" + os.path.join(pwd_path, "chrome_user_data"))
options.add_argument("--start-maximized")
#options.add_extension(os.path.join(pwd_path, "AdBlock_v3.22.1.crx"))
options.add_extension(os.path.join(pwd_path, "Adblock-Plus_v1.13.4.crx"))
driver = webdriver.Chrome(chrome_options=options) url_list = [
#"北京时间",
"https://www.btime.com",
"https://www.btime.com/sports",
"https://item.btime.com/m_2s21ridqq1l",
#"军事头条",
"http://www.tiexue.net/",
"http://bbs.tiexue.net/post2_12837139_1.html",
"http://www.tiexue.net/ShowPicClass_1485_1.html",
]
test_times = 20; with open('chrome_Adblock-Plus.txt', 'w') as log_file:
for url in url_list:
test_url(driver, log_file, url, test_times) driver.close()