speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time.

Charts Measurement runs Embed a score

simoncox.com

https://www.simoncox.com/

100 100 100 100 ✓AXE ✓CWV

Ranks Overall #19 Built Awesome #17

Data from Sep 7, 2026, 9:05 AM UTC old Measured once a week · 3 runs since Aug 21, 2026

Test elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis

Stack

Eleventy 3.1.6 Built with Eleventy 3.1.6
Cloudflare Hosted by Cloudflare

Core Web Vitals field data, origin-level

Real Chrome users, 28-day window (2026-08-09 → 2026-09-05).

LCP 614 ms good
INP 70 ms good
CLS 0 good

Lighthouse Scores

100
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 3.00 s.

  1. 375 ms
  2. 750 ms
  3. 1.13 s
  4. 1.50 s
  5. 1.88 s
  6. 2.25 s
  7. 2.63 s
  8. 3.00 s

Without JavaScript

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

Scripts disabled
As rendered

0.5% of pixels differ — they are nearly identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 1.58 s 1.57 s ↑ +5 ms (+0.3%) 1.57 s 1.58 s
CLS Cumulative Layout Shift 0 0 → no change 0 0
TBT Total Blocking Time 0 ms 0 ms → no change 0 ms 0 ms
FCP First Contentful Paint 808 ms 801 ms ↑ +7 ms (+0.9%) 801 ms 1.57 s
Speed Index 808 ms 801 ms ↑ +7 ms (+0.9%) 801 ms 1.57 s
TTFB Time to First Byte 464 ms 612 ms ↓ -148 ms (-24.2%) 464 ms 612 ms

LCP Subparts lab observed, unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab metrics LCP metric shown above is throttled.

element render delay 43 ms
time to first byte 18 ms

Field data Chrome UX Report, origin-level

Real Chrome users, 28-day trailing window (2026-08-09 → 2026-09-05).

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 614 ms good 98.5% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 70 ms good 96% good
CLS CWV 0 good 97.4% good
FCP 547 ms good 97.7% good
TTFB 331 ms good 94.7% good

Lab LCP vs Field LCP

Lab 1.58 s
Field p75 614 ms

The lab LCP is 2.57× the field p75 — real users likely have above-average hardware or network connectivity.

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending LCPINPCLSFCPTTFB
2026-08-29 664 ms — 0 593 ms 321 ms
2026-08-22 675 ms — 0 643 ms —
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 —

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 159 kB 98.9 kB ↑ +58.3 kB (+60.3%) 98.9 kB 159 kB
Requests 12 11 ↑ +1 (+9.1%) 11 15
Third-party Weight 3.2 kB 3.2 kB ↓ -1 B 3.2 kB 14.6 kB
Third-party CPU 3 ms 2 ms ↑ +0 ms (+8.7%) 2 ms 5 ms
Unused JS 0 B 0 B → no change 0 B 0 B
Unused CSS 0 B 0 B → no change 0 B 0 B

By resource type

  • image 55.6% 83.7 kB · 7 req
  • other 34% 51.2 kB · 2 req
  • document 8.6% 12.9 kB · 1 req
  • script 1.8% 2.8 kB · 1 req

Third parties 1 entities

3.2 kB transferred, 3 ms on the main thread.

Fathom Analytics script 3.2 kB · 3 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 203 ms 185 ms ↑ +18 ms (+9.6%) 185 ms 247 ms
Long Tasks 0 0 → no change 0 0
DOM Elements 214 205 ↑ +9 (+4.4%) 205 217
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 0 → no change 0 0
A11y Failures 0 0 → no change 0 1
A11y Failing Nodes 0 0 → no change 0 2

Main thread work

other 108 ms
style layout 36 ms
script evaluation 24 ms
paint composite render 18 ms
parse HTML 13 ms
script parse compile 3 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 518 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook
Sep 7, 2026, 9:05 AM UTC 100 1.58 s 0 0 ms 159 kB 3/3 ±0 2,386 -4% 23.1s
Aug 31, 2026, 4:00 AM UTC 100 1.57 s 0 0 ms 98.9 kB 3/3 ±0 2,461 -1% 23s
Aug 21, 2026, 2:36 PM UTC 99 1.57 s 0 0 ms 122 kB 3/3 ±1 2,350 -5% 24.3s

Embed this score

Use this web component to show simoncox.com's scores on any website, updated whenever this instance re-measures. 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>