https://abuisman.com/posts/developer-tools/quick-page-benchm...
As mentioned here in the thread, when you want to go into the single ms optimisations it is not the best approach since there is a lot of overhead especially the way I demonstrate here, but it works very well for some sanity checks.
Is it, though?
What I would expect a system like this to have, at a minimum:
* Robust statistics with p-values (not just min/max, compensation for multiple hypotheses, no Gaussian assumptions)
* Multiple stopping points depending on said statistics.
* Automatic isolation to the greatest extent possible (given appropriate permissions)
* Interleaved execution, in case something external changes mid-way.