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PUBLIC WEB DIAGNOSTIC
Website Speed Test
Measure public response time, TTFB and page weight.
Methodology
Measure a bounded unauthenticated response. The result reports server timing and bytes, not browser rendering or Core Web Vitals.
What the result means
Status, TTFB, total time and bounded bytes. Treat it as a practical observation rather than a guarantee about every user or provider.
Limitations
It is not Lighthouse or a Core Web Vitals audit. Unavailable results are reported honestly instead of guessed.
Worked example
For https://example.com, a TTFB of 180 ms and 42 KB response is a single location snapshot, not a user experience score.
FAQ
Does it report Core Web Vitals?
No. It reports a bounded network snapshot.