This site, measured honestly
I tell people to instrument before they optimise. It would be a poor look not to do it here. These are Core Web Vitals collected from real visits to this site — not a lab score from an ideal machine on an ideal network.
p75 across recent visits
0 samples · refreshing every 5sThis visit, measured in your browser
- TTFB
- measuring…
- FCP
- measuring…
- LCP
- measuring…
- CLS
- measuring…
- INP
- interact with the page…
Build
- Commit
- local
- Branch
- local
- Region
- local
- Rendered
- 2026-08-30T16:02:23.879Z
What this is, and what it is not
Every visitor's browser reports LCP, INP, CLS, TTFB and FCP to a small endpoint on this site. The figures above are the 75th percentile of those samples — the percentile Core Web Vitals is actually assessed on, because an average hides the slow tail that people actually complain about.
Samples currently live in an in-process ring buffer, so they reset on deploy and are not shared between server instances. That is a deliberate trade for a personal site with no database, and it would be dishonest to present the numbers without saying so. The store sits behind an interface — pointing it at Redis or Postgres is one file.
Nothing identifying is collected: a metric name, a number, and the path. No cookies, no fingerprint, no third party.
Let's build something worth maintaining
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