simoncox.com
Data from Aug 21, 2026, 2:36 PM UTC 2d old
Built Awesome #307 · 1 measurement · since Aug 21, 2026
Stack
Detected on the same page load as the accessibility pass — the generator
from <meta name="generator"> or the shape of the page,
the host from response headers.
Core Web Vitals field data, origin-level
Real Chrome users, 28-day window (2026-07-23 → 2026-08-19). This is what Google measures you on.
Scores
Lab metrics Lighthouse, mobile
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| LCP Largest Contentful Paint | 1.57 s | — | — | 1.57 s | 1.57 s | |
| CLS Cumulative Layout Shift | 0 | — | — | 0 | 0 | |
| TBT Total Blocking Time | 0 ms | — | — | 0 ms | 0 ms | |
| FCP First Contentful Paint | 1.57 s | — | — | 1.57 s | 1.57 s | |
| Speed Index | 1.57 s | — | — | 1.57 s | 1.57 s | |
| TTFB Time to First Byte | 495 ms | — | — | 495 ms | 495 ms |
What LCP is made of observed, unthrottled
A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.
Measured on the trace before throttling is modelled, so these are real durations that will not sum to the 1.57 s above — that figure is a simulation of the same load on a slow phone and connection. Read these for the proportions: which phase dominates.
Field data Chrome UX Report, origin-level
Real Chrome users, 28-day trailing window (2026-07-23 → 2026-08-19). This is what Google measures you on.
| Metric | p75 | Rating | Distribution (good / needs work / poor) |
|---|---|---|---|
| LCP CWV | 700 ms | good | 98% good |
| CLS CWV | 0 | good | 96.4% good |
| FCP | 669 ms | good | 96.4% good |
Lab vs field
Lab LCP 1.57 s · field p75 700 ms · real users are 0.45× faster than the lab.
Field history 25 weeks
Weekly p75 from the CrUX History API, backfilled in a single request.
| Week ending | LCP | INP | CLS | FCP | TTFB |
|---|---|---|---|---|---|
| 2026-08-15 | 704 ms | — | 0 | 669 ms | — |
| 2026-08-08 | 678 ms | — | 0 | 652 ms | — |
| 2026-08-01 | 677 ms | — | 0 | 635 ms | — |
| 2026-07-25 | — | — | 0 | 592 ms | 292 ms |
| 2026-07-18 | 741 ms | — | 0 | 647 ms | — |
| 2026-07-11 | 741 ms | — | 0 | 708 ms | — |
| 2026-07-04 | 774 ms | — | 0 | 736 ms | 333 ms |
| 2026-06-27 | 786 ms | — | 0 | 754 ms | 363 ms |
| 2026-06-20 | 745 ms | — | 0 | 708 ms | — |
| 2026-06-13 | 822 ms | — | 0 | 775 ms | — |
| 2026-06-06 | 725 ms | — | 0 | 699 ms | — |
| 2026-05-30 | 715 ms | 76 ms | 0 | 640 ms | — |
Page weight
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| Page Weight | 122 kB | — | — | 122 kB | 122 kB | |
| Requests | 15 | — | — | 15 | 15 | |
| Third-party Weight | 14.6 kB | — | — | 14.6 kB | 14.6 kB | |
| Third-party CPU | 5 ms | — | — | 5 ms | 5 ms | |
| Unused JS | 0 B | — | — | 0 B | 0 B | |
| Unused CSS | 0 B | — | — | 0 B | 0 B |
By resource type
Third parties 2 entities
14.6 kB transferred, 5 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.
Page health
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| Main Thread Work | 247 ms | — | — | 247 ms | 247 ms | |
| Long Tasks | 0 | — | — | 0 | 0 | |
| DOM Elements | 217 | — | — | 217 | 217 | |
| Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset | 0 | — | — | 0 | 0 | |
| A11y Failures | 1 | — | — | 1 | 1 | |
| A11y Failing Nodes | 2 | — | — | 2 | 2 |
Main thread work
Axe violations axe-core 4.13.0, full rule set
0 violating nodes across 0 rules, 523 passing. This is a standalone axe run, stricter than the subset Lighthouse folds into its score above — and it is the second tiebreaker in the ranking.
Accessibility failures 1 of 23 audits
Tracked as a count, not just the score — the weighted score is coarse enough that you can ship a broken component and barely move it.
-
label-content-name-mismatch— Elements with visible text labels do not have matching accessible names. 2 nodes
Hygiene
Changes rarely — which is exactly why a change is worth noticing.
Measurement log
Every stored run for this URL, newest first. Failures are kept as records — "this site was down on Tuesday" is data too.
| When | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took |
|---|---|---|---|---|---|---|---|---|---|
| Aug 21, 2026, 2:36 PM UTC | 99 | 1.57 s | 0 | 0 ms | 122 kB | 3/3 | ±1 | 2,350 | 24.3s |
Embed this score
Live below, then the markup that produces it. Drop that on any page to show
simoncox.com's scores, updated whenever this instance
re-measures — more about the component. Don’t forget to bundle the speedlify2-score.js component code into your site!
<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://www.simoncox.com/"></speedlify2-score>