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()