使用 python selenium 的页面加载时间在同一页面中的多个请求的 Performanance.timing 值不变

Question

我正在尝试通过执行 javascript 命令performanance.timing使用 python 和 selenium 获取页面加载时间

当导航到另一个页面时，我能够正确获取值，但如果我从同一页面执行一个交易/操作，这将带我到同一页面中的另一个选项卡，则 performanance.timing 不会改变。

注意：如果我重新加载页面，我可以更改值

有人可以告诉我如何获得我在 web 应用程序中执行的每个步骤的加载时间。

python selenium 脚本：

from selenium import webdriver




driver = webdriver.Firefox()
driver.implicitly_wait(40)

########### Home Page #################
driver.get("http://app.edulastic.com")

navigationStart = driver.execute_script("return window.performance.timing.navigationStart")    
responseStart = driver.execute_script("return window.performance.timing.responseStart")
domComplete = driver.execute_script("return window.performance.timing.domComplete")


loadStart = driver.execute_script("return window.performance.timing.domInteractive")
loadend = driver.execute_script("return window.performance.timing.navigationStart")

backendPerformance = responseStart - navigationStart
frontendPerformance = domComplete - responseStart
loadingTime=loadStart-loadend

print ("Back End Homepage: %s" % backendPerformance)
print ("Front End Homepage: %s" % frontendPerformance)
print("loading time : %s" %loadingTime)

#################### Dashboard ##################

driver.find_element_by_id('login-email').send_keys("*****@gmail.com")
driver.find_element_by_id("login-password").send_keys("******")
driver.find_element_by_id("signIn").click()

driver.find_element_by_link_text("Create New Assignment")

navigationStart = driver.execute_script("return window.performance.timing.navigationStart")
responseStart = driver.execute_script("return window.performance.timing.responseStart")
domComplete = driver.execute_script("return window.performance.timing.domComplete")
domLoading = driver.execute_script("return window.performance.timing.domLoading")

loadStart = driver.execute_script("return window.performance.timing.domInteractive")
loadend = driver.execute_script("return window.performance.timing.navigationStart")


backendPerformance = responseStart - navigationStart
frontendPerformance = domComplete - responseStart
loadingTime=loadStart-loadend


#print("time converted ... %s" %time.strftime("%SSSS", time.gmtime(domLoading)))

print ("Back End Dashboard: %s" % backendPerformance)
print ("Front End Dashboard: %s" % frontendPerformance)
print("loading time : %s" %loadingTime)
#print("dom laoding time :%s" %domLoading)


########## create new assignment #########
driver.find_element_by_link_text("Create New Assignment").click()

print(driver.find_element_by_id("create-assessment-with-val").is_displayed())

loadStart = driver.execute_script("return window.performance.timing.domInteractive")
loadend = driver.execute_script("return window.performance.timing.navigationStart")

loadingTime = loadStart-loadend
print("loading time : %s" %loadingTime)


driver.quit()

创建新的分配部分导航到页面一侧的另一个选项卡，但时间值不会改变。

图片 -

单击左侧图标时呈现另一个内容

Answer 1

我知道问题已经过去 5 年了，但我今天才发现问题出在哪里。

"return window.performance.timing" function 从浏览器控制台获取信息。 如果您在同一个 window 中使用同一个 function 两次，它每次都会返回相同的数字，因为它是仍然打开的同一个窗口。

如果你想每次都获得新的性能时序，你只需预先用driver.refresh()刷新 window

刷新后开始

navigationStart = driver.execute_script("return window.performance.timing.navigationStart")
responseStart = driver.execute_script("return window.performance.timing.responseStart")

然后像以前一样继续执行代码。