06 - Selenium 4.0.0 - Chrome Dev Tools - Example to Capture Performance Metrics of website

This is one of the new features of selenium 4.0.0 release, that is the ability to access the browser's dev tools and its relevant items. Currently this feature is available only with the Chrome Browser, as selenium is still working with other browser vendors to this bidirectional protocol and APIs enabled.

In this video, I have explained you the code as how to access your web application's performance metrics, this helps us to analyze if the application's performance on a certain page is as expected or not, and enables to increase the horizon of testing other aspects of the website as well.

Once this feature is added to access the browser dev tools, the possibilities are now multiplied and we need to explore more and more..

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[ramanareddyjakkireddy]

DevTools class work with RemoteWebDriver?

[Anton-ezpl]

Hello ) How to calculate CPU usage (in%) like we have in performance monitor ?

[EBRDDiwali]

Can we use this metrics for each page navigation ?? and also for the e2e script??

[jossuerguillen]

i'm currently using selenium 4 version however they are a lot of option that wont work for me my Chromedriver version is the correct one, can you please share the dependencies you are using for this video ??

[MrMohit]

can we use lighthouse with this? as it is also a dev tool?

[prathameshmore]

I want to access Network tab and capture payload form a specific ajax call. Can you explain how can we do that

[sonalmittal]

Thanks sir. Please let me know which software you have used to record this video, and is it free? Thanks much.

[vikraal]

Hi bro, thanks for this video.
can I do the same in python?
Actually, I only want to fetch page response as html or string.

I found this method in documentation
(Network.getResponseBody but I don't know what to put in requestId)

[paurnimasankar]

Hi, I used the same code and got Exception - 'Exception in thread "main" Unable to create DevTools connection'. What could be the cause?