simoncox.com
Data from Aug 21, 2026, 2:36 PM UTC — 4h old.
Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 4h
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
A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.
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 | 122.2 kB | — | — | 122.2 kB | 122.2 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 | 122.2 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 speedlify-score.js component code into your site!
<speedlify-score speedlify-url="https://zachleat.github.io/speedlify2/" url="https://www.simoncox.com/"></speedlify-score>