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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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reflectivetechconsulting.com/jamstack-eleventy-custom

https://reflectivetechconsulting.com/jamstack-eleventy-custom

69PERF 76A11Y 100BEST 92SEO ✗AXE –CWV

Ranks Overall #1,400 Build Awesome Starters #160

Data from Sep 19, 2026, 10:14 PM UTC old Measured once a week · 6 runs since Aug 20, 2026

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

This URL redirects to https://reflectivetechconsulting.com/jamstack-eleventy-custom/.

The same URL in a different form — a trailing slash — so both are treated as one site rather than two: one history, measured once. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

Moved from https://hidegh.github.io/jamstack-eleventy-custom.

History from the previous URL is included below, with the move on Sep 5, 2026. A step-change around that point is likely the change of address rather than a regression.

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

Stack

Uses Font Awesome 6.2.0Font Awesome 6.2.0
GitHub Pages Hosted by GitHub Pages

Lighthouse Scores LAB Simulated

69
Performance
↑ +1 (+1.5%)
76
Accessibility
no change
100
Best Practices
no change
92
SEO
no change

Metrics LAB

No field data: the Chrome UX Report is not being collected for this project, so every figure below is from the Lighthouse run.

Metric Lab Simulated
Value Change / range Trend
LCP CWV (estimate) Largest Contentful Paint 5.16 s poor ↓ -155 ms (-2.9%) 5.16 s – 6.24 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.001 good → no change 0.001 – 0.001
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 4.86 s poor ↓ -5 ms (-0.1%) 4.86 s – 5.75 s
Speed Index 4.86 s needs work ↓ -5 ms (-0.1%) 4.86 s – 5.75 s
TTFB Time to First Byte 607 ms good ↑ +3 ms (+0.5%) 603 ms – 612 ms

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.

element render delay 295 ms
time to first byte 15 ms

Page weight

Metric Value Change / range Trend
Page Weight 538 kB ↓ -250 B 538 kB – 541 kB
Requests 45 → no change 45 – 46
Third-party Weight 367 kB ↓ -329 B (-0.1%) 367 kB – 541 kB
Third-party CPU 14 ms ↓ -1 ms (-6.3%) 14 ms – 34 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 73.1 kB ↑ +6 B 73.1 kB – 73.1 kB

By resource type

Type Transfer Share Size Requests
font 36.2% 195 kB 4
script 20.7% 111 kB 15
stylesheet 20% 108 kB 11
other 13.2% 70.8 kB 3
image 6.8% 36.5 kB 1
document 3.1% 16.7 kB 1
Total 538 kB 45

Third parties 3 entities

Entity Transfer Size Main thread Simulated
Cloudflare CDN fontscript 217 kB 5 ms
JSDelivr CDN scriptstylesheet 105 kB 9 ms
Google Fonts font 45.6 kB 0 ms
Total 367 kB 14 ms

Without JavaScript

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

Scripts disabled
As rendered

18.3% of pixels differ — parts of the page change. 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 1.58 s ↓ -237 ms (-13%) 1.49 s – 1.86 s
Long Tasks 3 ↑ +1 (+50%) 2 – 4
DOM Elements 1,029 → no change 1,029 – 1,029
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 80 → no change 78 – 80
A11y Failures 9 → no change 9 – 9
A11y Failing Nodes 80 → no change 80 – 80

Main thread work

Task Time Share Duration Simulated
other 31% 487 ms
paint composite render 28% 444 ms
style layout 17% 275 ms
script evaluation 15% 244 ms
parse HTML 5% 72 ms
script parse compile 2% 37 ms
garbage collection 1% 18 ms
Total 1.58 s

Axe violations axe-core 4.13.0, full rule set

80 violating nodes across 10 rules, 2353 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious color-contrast — Elements must meet minimum color contrast ratio thresholds 43 nodes
  • serious aria-progressbar-name — ARIA progressbar nodes must have an accessible name 14 nodes
  • critical button-name — Buttons must have discernible text 11 nodes
  • moderate heading-order — Heading levels should only increase by one 6 nodes
  • serious aria-command-name — ARIA commands must have an accessible name 1 node
  • critical aria-required-children — Certain ARIA roles must contain particular children 1 node
  • critical image-alt — Images must have alternative text 1 node
  • moderate landmark-unique — Landmarks should have a unique role or role/label/title (i.e. accessible name) combination 1 node
  • serious link-name — Links must have discernible text 1 node
  • serious listitem — <li> elements must be contained in a <ul> or <ol> 1 node

Accessibility failures 9 of 36 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 43 nodes
  • aria-progressbar-name — ARIA `progressbar` elements do not have accessible names. 14 nodes
  • button-name — Buttons do not have an accessible name 11 nodes
  • heading-order — Heading elements are not in a sequentially-descending order 6 nodes
  • target-size — Touch targets do not have sufficient size or spacing. 2 nodes
  • aria-command-name — `button`, `link`, and `menuitem` elements do not have accessible names. 1 node
  • image-alt — Image elements do not have `[alt]` attributes 1 node
  • link-name — Links do not have a discernible name 1 node
  • label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 1 node

SEO failures 1 of 10 audits

  • image-alt — Image elements do not have `[alt]` attributes 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 19, 2026, 10:14 PM UTC 69 5.16 s 0.001 0 ms 538 kB 3/3 ±3 2,489 0% 31.8s Wayback
Sep 12, 2026, 9:20 PM UTC 68 5.31 s 0.001 0 ms 538 kB 3/3 ±4 2,479 0% 34.8s Wayback
Sep 5, 2026, 8:01 PM UTC 69 5.17 s 0.001 0 ms 541 kB 3/3 ±1 2,489 0% 35.5s Wayback
Sep 5, 2026, 3:52 PM UTC old URL 64 6.05 s 0.001 0 ms 538 kB 3/3 ±3 2,983 +20% 29.6s Wayback
Aug 29, 2026, 12:32 PM UTC old URL 65 6.24 s 0.001 0 ms 538 kB 3/3 ±3 2,447 -2% 31.1s Wayback
Aug 20, 2026, 11:39 PM UTC old URL 65 6.09 s 0.001 0 ms 541 kB 3/3 ±3 2,322 -7% 32s Wayback

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