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.

Charts Compare Measurement runs Embed a score Open to Work

jekyllrb.com

https://jekyllrb.com/

99PERF 93A11Y 100BEST 100SEO ✗AXE ✓CWV

Ranks Overall #1,200 Developer Tooling #37 Site Generators #12

Data from Oct 7, 2026, 10:52 PM UTC old Measured every 2 days · 25 runs since Aug 20, 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

Jekyll 4.4.1 Built with Jekyll 4.4.1

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.00 s. Compare this filmstrip against another site.

  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

Lighthouse Scores LAB Simulated

99
Performance
no change
93
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 (2026-09-08 → 2026-10-05), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 2.27 s good ↑ +97 ms (+4.5%) 1.96 s – 2.98 s 1.15 s good 95.5% 3.1% 1.4%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 82 ms good 97.1% 2.9% 0%
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0 0 good 99.2% 0.6% 0.2%
TBT Total Blocking Time 61 ms good ↑ +4 ms (+7%) 25 ms – 74 ms n/a —
FCP First Contentful Paint 919 ms good ↑ +13 ms (+1.4%) 902 ms – 927 ms 1.17 s good 91.3% 6.3% 2.4%
Speed Index 919 ms good ↑ +13 ms (+1.4%) 902 ms – 927 ms n/a —
TTFB Time to First Byte 619 ms good ↑ +13 ms (+2.1%) 602 ms – 619 ms 626 ms good 84.3% 13.2% 2.5%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

element render delay 1.18 s
time to first byte 582 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.27 s
Field p75 1.15 s

The lab LCP is 1.98× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 373 kB ↓ -68 B 367 kB – 374 kB
Requests 12 → no change 12 – 13
Third-party Weight 234 kB ↓ -96 B 229 kB – 236 kB
Third-party CPU 70 ms ↑ +5 ms (+8.1%) 43 ms – 70 ms
Unused JS 100 kB ↓ -1.5 kB (-1.5%) 73.6 kB – 102 kB
Unused CSS 12.1 kB → no change 12.1 kB – 12.1 kB

By resource type

Type Transfer Share Size Requests
script 63.1% 234 kB 3
image 19.6% 72.7 kB 3
font 12.5% 46.5 kB 2
stylesheet 3.8% 14.1 kB 1
document 1% 3.7 kB 1
other <0.1% 38 B 1
Total 373 kB 12

Third parties 3 entities

Entity Transfer Size Main thread Simulated
Google Tag Manager script 165 kB 45 ms
JSDelivr CDN script 48.2 kB 12 ms
Google Analytics 20.9 kB 13 ms
Total 234 kB 70 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 593 ms ↑ +64 ms (+12.1%) 385 ms – 643 ms
Long Tasks 1 ↓ -1 (-50%) significant 1 – 4
DOM Elements 143 → no change 143 – 143
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 12 → no change 12 – 13
A11y Failures 2 → no change 2 – 2
A11y Failing Nodes 8 → no change 8 – 8

Main thread work

Task Time Share Duration Simulated
script evaluation 52% 306 ms
other 18% 107 ms
style layout 14% 84 ms
script parse compile 12% 72 ms
parse HTML 2% 15 ms
paint composite render 1% 8 ms
Total 593 ms

Axe violations axe-core 4.13.0, full rule set

12 violating nodes across 3 rules, 207 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious link-in-text-block — Links must be distinguishable without relying on color 7 nodes
    Offending elements (5 of 7)
    1. .features > .grid > .one-third.unit:nth-child(2) > p > a:nth-child(1) 
      <a href="https://daringfireball.net/projects/markdown/">Markdown</a>
    2. .one-third.unit:nth-child(2) > p > a:nth-child(2) 
      <a href="https://github.com/Shopify/liquid/wiki">Liquid</a>
    3. p > a[href$="pages.github.com/"] 
      <a href="https://pages.github.com/">GitHub Pages</a>
    4. p > a:nth-child(3) 
      <a href="https://help.github.com/articles/about-supported-custom-domains/">custom domain name</a>
    5. a[href$="team/"] 
      <a href="/team/">core team</a>
  • moderate region — All page content should be contained by landmarks 4 nodes
    Offending elements
    1. .intro 
      <section class="intro"> <div class="grid"> <div class="unit whole center-on-mobiles"> <p class="first">Transform your plain text into static&nbsp;websites and&nbsp;blogs.</p> </div> </div> </section>
    2. .features 
      <section class="features center-on-mobiles">
    3. .quickstart 
      <section class="quickstart">
    4. .free-hosting 
      <section class="free-hosting">
  • moderate landmark-one-main — Document should have one main landmark 1 node
    Offending element
    1. html 
      <html lang="en">

Accessibility failures 2 of 20 audits

  • link-in-text-block — Links rely on color to be distinguishable. 7 nodes
  • landmark-one-main — Document does not have a main landmark. 1 node

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-26 1.19 s 80 ms 0 1.20 s 626 ms
2026-09-19 1.18 s 80 ms 0 1.19 s 599 ms
2026-09-12 1.18 s 78 ms 0 1.18 s 601 ms
2026-09-05 1.17 s 77 ms 0 1.18 s 617 ms
2026-08-29 1.18 s 74 ms 0 1.19 s 639 ms
2026-08-22 1.13 s 75 ms 0 1.16 s 596 ms
2026-08-15 1.08 s 76 ms 0 1.09 s 595 ms
2026-08-08 1.06 s 75 ms 0 1.07 s 548 ms
2026-08-01 1.03 s 76 ms 0 1.05 s 559 ms
2026-07-25 1.06 s 74 ms 0 1.08 s 609 ms
2026-07-18 1.08 s 73 ms 0 1.09 s 604 ms
2026-07-11 1.13 s 76 ms 0 1.15 s 638 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 7, 2026, 10:52 PM UTC 99 2.27 s 0 61 ms 373 kB 3/3 ±1 2,448 -2% 40.7s Wayback
Oct 5, 2026, 6:07 PM UTC 99 2.17 s 0 57 ms 373 kB 3/3 ±0 2,495 0% 41.5s Wayback
Oct 1, 2026, 6:51 AM UTC 99 2.03 s 0 66 ms 374 kB 3/3 ±0 2,372 -5% 40.5s Wayback
Sep 29, 2026, 4:26 AM UTC 97 2.56 s 0 53 ms 371 kB 3/3 ±5 2,497 0% 39.3s Wayback
Sep 25, 2026, 4:54 PM UTC 99 2.01 s 0 52 ms 371 kB 3/3 ±0 2,502 +1% 39.6s Wayback
Sep 23, 2026, 10:57 AM UTC 99 1.97 s 0 36 ms 370 kB 3/3 ±2 3,447 +39% 38.6s Wayback
Sep 21, 2026, 7:46 AM UTC 99 1.98 s 0 55 ms 370 kB 3/3 ±5 2,465 -1% 39.5s Wayback
Sep 18, 2026, 5:40 PM UTC 99 2.15 s 0 34 ms 370 kB 3/3 ±11 2,872 +16% 39.3s Wayback
Sep 16, 2026, 9:22 AM UTC 99 1.96 s 0 53 ms 370 kB 3/3 ±1 2,492 0% 39.7s Wayback
Sep 14, 2026, 6:01 AM UTC 99 2.12 s 0 36 ms 369 kB 3/3 ±0 3,340 +34% 38.4s Wayback
Sep 11, 2026, 11:33 PM UTC 99 2.00 s 0 54 ms 370 kB 3/3 ±5 2,330 -6% 40s Wayback
Sep 9, 2026, 8:34 PM UTC 99 1.98 s 0 48 ms 369 kB 3/3 ±1 2,375 -4% 21.5s Wayback
Sep 7, 2026, 7:08 PM UTC 99 2.05 s 0 51 ms 371 kB 3/3 ±0 2,319 -7% 20.8s Wayback
Sep 5, 2026, 6:05 PM UTC 99 2.12 s 0 25 ms 369 kB 3/3 ±0 4,246 +71% 19.5s Wayback
Sep 4, 2026, 11:01 AM UTC 99 2.00 s 0 51 ms 369 kB 3/3 ±0 2,439 -2% 21.4s Wayback
Sep 3, 2026, 6:53 AM UTC 99 2.01 s 0 58 ms 369 kB 3/3 ±5 2,456 -1% 21.6s Wayback
Sep 2, 2026, 3:04 AM UTC 99 2.01 s 0 54 ms 369 kB 3/3 ±5 2,406 -3% 21.2s Wayback
Aug 31, 2026, 9:29 PM UTC 99 1.96 s 0 60 ms 369 kB 3/3 ±1 2,428 -2% 22.1s Wayback
Aug 27, 2026, 2:29 PM UTC 99 2.10 s 0 57 ms 368 kB 3/3 ±19 2,450 -1% 23.1s Wayback
Aug 26, 2026, 4:38 AM UTC 99 2.02 s 0 61 ms 368 kB 3/3 ±2 2,462 -1% 22.8s Wayback
Aug 25, 2026, 3:53 AM UTC 99 2.11 s 0 37 ms 367 kB 3/3 ±12 3,027 +22% 23.7s Wayback
Aug 24, 2026, 3:02 AM UTC 94 2.98 s 0 74 ms 368 kB 3/3 ±25 2,363 -5% 24.8s Wayback
Aug 23, 2026, 1:15 AM UTC 99 2.04 s 0 53 ms 368 kB 3/3 ±27 2,473 -1% 29s Wayback
Aug 22, 2026, 1:09 AM UTC 98 2.14 s 0 73 ms 368 kB 3/3 ±27 2,320 -7% 27s Wayback
Aug 20, 2026, 11:32 PM UTC 99 1.96 s 0 56 ms 368 kB 3/3 ±5 2,499 +1% 21.3s Wayback