--snip--
have you installed stress-ng?
stress-ng is just different software to perform stress test. The point of my suggestion is to perform CPU stress test for certain duration and see how hot is your chromebook during maximum CPU usage.
EPS last updated 3 years ago, so IMO it's not ideal option.
Btw, in 2022, Jameson Lopp posted an article comparing the performance of various electrum servers.
Give it a look, just for your information.
Also see this benchmark,
https://www.sparrowwallet.com/docs/server-performance.html.