speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time. Follow us on Mastodon or Bluesky.

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simoncox.com

https://www.simoncox.com/

100PERF 100A11Y 100BEST 100SEO ✓AXE ✓CWV

Ranks Overall #50 Built Awesome #45

Data from Oct 5, 2026, 11:56 PM UTC old Measured once a week · 7 runs since Aug 21, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Eleventy 3.1.6 Built with Eleventy 3.1.6
Cloudflare Hosted by Cloudflare

Lighthouse Scores LAB Simulated

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

Metrics LAB FIELD

Core Web Vitals: passing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-06 → 2026-10-03), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 898 ms good ↑ +13 ms (+1.5%) 885 ms – 1.59 s 674 ms good 97.8% 1.9% 0.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 74 ms good 98.5% 1.5% 0%
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0 0 good 97.9% 0% 2.1%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 898 ms good ↑ +13 ms (+1.5%) 801 ms – 1.57 s 646 ms good 97% 1.5% 1.5%
Speed Index 898 ms good ↑ +13 ms (+1.5%) 801 ms – 1.57 s n/a —
TTFB Time to First Byte 533 ms good ↓ -157 ms (-22.8%) 463 ms – 690 ms 361 ms good 93% 5.5% 1.5%

LCP Subparts LAB Unthrottled

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

time to first byte 124 ms
element render delay 58 ms

LCP LAB Simulated vs LCP FIELD

Lab 898 ms
Field p75 674 ms

The lab LCP is 1.33× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 158 kB ↓ -230 B (-0.1%) 98.9 kB – 159 kB
Requests 12 → no change 11 – 15
Third-party Weight 3.2 kB ↓ -1 B 3.2 kB – 14.6 kB
Third-party CPU 2 ms ↓ -0 ms (-13.6%) 2 ms – 5 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
image 55.6% 83.6 kB 7
other 34% 51.2 kB 2
document 8.6% 12.9 kB 1
script 1.8% 2.8 kB 1
Total 158 kB 12

Third parties 1 entities

Entity Transfer Size Main thread Simulated
Fathom Analytics script 3.2 kB 2 ms
Total 3.2 kB 2 ms

Without JavaScript

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

Scripts disabled
As rendered

0% of pixels differ — they are identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric Value Change / range Trend
Main Thread Work 200 ms ↓ -37 ms (-15.6%) significant 185 ms – 247 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 214 → no change 205 – 217
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 0
A11y Failures 0 → no change 0 – 1
A11y Failing Nodes 0 → no change 0 – 2

Main thread work

Task Time Share Duration Simulated
other 48% 97 ms
style layout 21% 42 ms
paint composite render 11% 22 ms
script evaluation 11% 22 ms
parse HTML 7% 15 ms
script parse compile 1% 2 ms
Total 200 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

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-26 675 ms 74 ms 0 624 ms 350 ms
2026-09-19 672 ms 73 ms 0 603 ms 346 ms
2026-09-12 614 ms 70 ms 0 520 ms 306 ms
2026-09-05 614 ms 70 ms 0 547 ms 331 ms
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 —

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 5, 2026, 11:56 PM UTC 100 898 ms 0 0 ms 158 kB 3/3 ±1 2,501 +1% 22.2s Wayback
Sep 28, 2026, 6:35 PM UTC 100 885 ms 0 0 ms 159 kB 3/3 ±0 2,454 -1% 24.8s Wayback
Sep 21, 2026, 3:00 PM UTC 100 1.59 s 0 0 ms 159 kB 3/3 ±0 2,480 0% 24.2s Wayback
Sep 14, 2026, 12:01 PM UTC 100 1.55 s 0 0 ms 159 kB 3/3 ±1 2,499 +1% 22.9s Wayback
Sep 7, 2026, 9:05 AM UTC 100 1.58 s 0 0 ms 159 kB 3/3 ±0 2,386 -4% 23.1s Wayback
Aug 31, 2026, 4:00 AM UTC 100 1.57 s 0 0 ms 98.9 kB 3/3 ±0 2,461 -1% 23s Wayback
Aug 21, 2026, 2:36 PM UTC 99 1.57 s 0 0 ms 122 kB 3/3 ±1 2,350 -5% 24.3s Wayback

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>