Beyond Lighthouse: measure JavaScript and website performance by counting CPU instructions

Can we count CPU instruction for JavaScript and websites? Can it be a more reliable performance metric? Could it be be a less noisy Lighthouse buddy? Can we wrap it into a CI feedback loop for a developer who cares? Why would we do that? RAIL like and Lighthouse metrics are amazing, but they depend on networking and can be noisy. Let's try to build a workflow where with every commit we can measurably improve performance for our users.