selenium 优化 提升性能

结果：

用时：7.200437545776367s
用时：5.909301519393921s headless
用时：4.924464702606201s headless\phone
用时：4.935844421386719s headless\phone\no image

为了测试图片，http://image.baidu.com/

事实证明，no image对打开网页没影响，对网络有影响吧，这个有点

 from selenium import webdriver

 import time

 def method0():

     s1 = time.time()

     options = webdriver.ChromeOptions()

     options.binary_location = r'd:\downloads\app\chrome\chrome.exe'

     browser = webdriver.Chrome(options=options)

     browser.get('http://image.baidu.com/')

     browser.save_screenshot('baidu.png')

     browser.quit()

     s2 = time.time()

     print('用时：{0}s'.format(s2 - s1))

 def method1():

     # 优化1 headless

     s1 = time.time()

     options = webdriver.ChromeOptions()

     options.binary_location = r'd:\downloads\app\chrome\chrome.exe'

     options.headless = True

     browser = webdriver.Chrome(options=options)

     browser.get('http://image.baidu.com/')

     browser.save_screenshot('baidu_headless.png')

     browser.quit()

     s2 = time.time()

     print('用时：{0}s headless'.format(s2 - s1))

 def method2():

     # 优化2 headless\phone

     s1 = time.time()

     options = webdriver.ChromeOptions()

     options.add_argument('user-agent={0}'.format('MQQBrowser/26 Mozilla/5.0 (Linux; U; Android 2.3.7; zh-cn; MB200 Build/GRJ22; CyanogenMod-7) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1'))

     options.binary_location = r'd:\downloads\app\chrome\chrome.exe'

     options.headless = True

     browser = webdriver.Chrome(options=options)

     browser.get('http://image.baidu.com/')

     browser.save_screenshot('baidu_headless_phone.png')

     browser.quit()

     s2 = time.time()

     print(r'用时：{0}s headless\phone'.format(s2 - s1))

 def method3():

     # 优化3 headless\phone\no image

     s1 = time.time()

     options = webdriver.ChromeOptions()

     options.add_argument('user-agent={0}'.format('MQQBrowser/26 Mozilla/5.0 (Linux; U; Android 2.3.7; zh-cn; MB200 Build/GRJ22; CyanogenMod-7) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1'))

     options.binary_location = r'd:\downloads\app\chrome\chrome.exe'

     options.headless = True

     options.add_experimental_option("prefs", {"profile.managed_default_content_settings.images": 2})

     browser = webdriver.Chrome(options=options)

     browser.get('http://image.baidu.com/')

     browser.save_screenshot('baidu_headless_phone_image.png')

     browser.quit()

     s2 = time.time()

     print(r'用时：{0}s headless\phone\no image'.format(s2 - s1))

 if __name__ == '__main__':

     method0()

     method1()

     method2()

     method3()