How is Google Meet able to show CPU usage?
I noticed this today in my Chrome.
Google Meet is showing a chart of CPU usage in their "Troubleshooting" panel. I'm wondering if there's an existing API for this or is it a clever trick I'm not aware of.
I was curious about this as well when I saw the CPU Usage graph on the Troubleshooting page on the Google Meet's page. So googled a lot and I couldn't find any proper answer as to how it is being achieved apart from this link: https://developer.chrome.com/extensions/system_cpu#method-getInfo.
So, I went through the minified source code of the Google Meet's site and it turns out Google Meet is using this but not on their webpage directly, because it is for chrome extensions only, but through the Google Hangouts Extension which is present in Chrome, Brave and the new Microsoft Edge (Chromium-based).
The chrome extension is calling the chrome.system.cpu API to get the information about the processor, core count, temperatures, etc., and these details are being passed to the Google Meets page via window.postMessage API and Message Passing between Chrome Extension and a Webpage.
This is a neat little way to achieve this if you are the creator of the browser :P.
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