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In python-selenium chrome_options, What exactly is the difference between the following two options, I know both runs the selenium script without opening the browser. 

chrome_options.add_argument('--headless')
chrome_options.add_argument('--disable-gpu')
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  • see stackoverflow.com/questions/53657215/… Commented Nov 26, 2019 at 9:21
  • 1
    Personally, I have to use both in conjunction with each other for headless to work reliably. Commented Nov 26, 2019 at 14:37

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You saw it right. Adding the argument --headless initiates the Chrome Browsing Context in headless mode.

However the purpose of the argument --disable-gpu was to enable on platform. It was needed as SwiftShader fails an assert on Windows in headless mode earlier.

This issue was resolved through Headless: make --disable-gpu flag unnecessary

You can find a relevant detailed discussion in ERROR:gpu_process_transport_factory.cc(1007)-Lost UI shared context : while initializing Chrome browser through ChromeDriver in Headless mode

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9

--disable-gpu doesn't run the script without opening the browser, only --headless. It used to be needed on Windows Issue 737678: Headless: make --disable-gpu flag unnecessary, but this bug was fixed. chrome_options.add_argument('--headless') is all you need.

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