使用 python selenium 的頁面加載時間在同一頁面中的多個請求的 Performanance.timing 值不變

Question

我正在嘗試通過執行 javascript 命令performanance.timing使用 python 和 selenium 獲取頁面加載時間

當導航到另一個頁面時，我能夠正確獲取值，但如果我從同一頁面執行一個交易/操作，這將帶我到同一頁面中的另一個選項卡，則 performanance.timing 不會改變。

注意：如果我重新加載頁面，我可以更改值

有人可以告訴我如何獲得我在 web 應用程序中執行的每個步驟的加載時間。

python selenium 腳本：

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()

創建新的分配部分導航到頁面一側的另一個選項卡，但時間值不會改變。

圖片 -

單擊左側圖標時呈現另一個內容

Answer 1

我知道問題已經過去 5 年了，但我今天才發現問題出在哪里。

"return window.performance.timing" function 從瀏覽器控制台獲取信息。 如果您在同一個 window 中使用同一個 function 兩次，它每次都會返回相同的數字，因為它是仍然打開的同一個窗口。

如果你想每次都獲得新的性能時序，你只需預先用driver.refresh()刷新 window

刷新后開始

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

然后像以前一樣繼續執行代碼。