[A] tool to track what real users in the wild are experiencing with an easy setup? Yes, please. [...] I’ve been using Firebase web perf tracking since June on this very blog. Let’s take a look at the good, the bad, and the downright confusing portions of the Firebase web performance monitoring.
Justin talks about the good and bad of this particular product, but what I think is notable about this kind of performance tooling is that it is reflective of real users using your production site. A lot of performance tooling tests is just fancied up WebPageTest that runs your site once on probably-simulated browser conditions. I don't see as much happening in the real user performance monitoring space.
I think I'd rank performance testing by type like this:
- Run simulated performance metrics in CI. Stop merge requests that break metrics/budgets.
- Measure real user monitoring in production.
- Run simulated performance metrics in production.