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

alpinejs.dev

https://alpinejs.dev/

92PERF 93A11Y 100BEST 100SEO ✗AXE ✓CWV

Ranks Overall #1,265 Developer Tooling #41 Frameworks and Libraries #7

Data from Oct 9, 2026, 10:11 AM UTC old, older than this category's 3 days freshness target Measured every 2 days · 20 runs since Aug 27, 2026

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

This data is old.

Sites are measured on a rolling schedule, so figures here are the newest successful measurement rather than a reading taken just now. Comparisons against other sites may span different points in time.

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

Stack

Uses PreactPreactAlpine.js 3.17.4Alpine.js 3.17.4
Cloudflare Hosted by Cloudflare

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

92
Performance
↓ -3 (-3.2%)
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 (2026-09-10 → 2026-10-07), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 2.87 s needs work ↑ +252 ms (+9.6%) 2.43 s – 2.96 s 1.44 s good 89.4% 6.7% 4%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 64 ms good 96% 1.6% 2.3%
CLS CWV Cumulative Layout Shift 0.001 good ↓ -0.058 (-98.3%) significant 0 – 0.059 0 good 100% 0% 0%
TBT Total Blocking Time 4 ms good ↑ +4 ms 0 ms – 12 ms n/a —
FCP First Contentful Paint 2.43 s needs work ↑ +697 ms (+40.1%) significant 1.69 s – 2.49 s 1.43 s good 82% 10.7% 7.3%
Speed Index 2.43 s good ↑ +697 ms (+40.1%) significant 1.69 s – 2.49 s n/a —
TTFB Time to First Byte 460 ms good ↓ -192 ms (-29.4%) significant 458 ms – 652 ms 869 ms needs work 72.7% 19.6% 7.8%

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.

resource load duration 857 ms
time to first byte 617 ms
element render delay 465 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.87 s
Field p75 1.44 s

The lab LCP is 2× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 223 kB ↑ +486 B (+0.2%) 218 kB – 224 kB
Requests 26 → no change 25 – 26
Third-party Weight 150 kB ↑ +263 B (+0.2%) 145 kB – 150 kB
Third-party CPU 31 ms ↑ +11 ms (+54.5%) significant 16 ms – 46 ms
Unused JS 61.5 kB → no change 61.4 kB – 61.5 kB
Unused CSS 11.9 kB → no change 11.9 kB – 11.9 kB

By resource type

Type Transfer Share Size Requests
script 73.1% 163 kB 15
font 10.9% 24.3 kB 1
stylesheet 8.1% 18.1 kB 3
document 3.7% 8.3 kB 1
image 3.4% 7.6 kB 4
other 0.7% 1.6 kB 2
Total 223 kB 26

Third parties 4 entities

Entity Transfer Size Main thread Simulated
JSDelivr CDN script 112 kB 25 ms
Google Fonts font 24.9 kB 0 ms
Cloudflare 10.3 kB 4 ms
Fathom Analytics 3.2 kB 2 ms
Total 150 kB 31 ms

Without JavaScript

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

Scripts disabled
As rendered

0.8% of pixels differ — they are nearly 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 498 ms ↑ +171 ms (+52.4%) significant 291 ms – 4.95 s
Long Tasks 2 ↑ +2 0 – 4
DOM Elements 394 → no change 386 – 394
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 54 → no change 53 – 54
A11y Failures 2 → no change 2 – 2
A11y Failing Nodes 16 → no change 16 – 16

Main thread work

Task Time Share Duration Simulated
other 29% 146 ms
script evaluation 29% 144 ms
style layout 22% 107 ms
script parse compile 12% 61 ms
parse HTML 4% 21 ms
paint composite render 4% 19 ms
Total 498 ms

Axe violations axe-core 4.13.0, full rule set

54 violating nodes across 5 rules, 319 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • moderate region — All page content should be contained by landmarks 36 nodes
    Offending elements (5 of 36)
    1. .pb-24 
      <div class="m-auto flex flex-col items-center px-8 pt-32 pb-24 text-center text-gray-800 md:w-[650px]">
    2. .md\:w-\[775px\] 
      <div class="m-auto px-4 text-gray-800 md:w-[775px] md:px-0">
    3. .space-y-2.font-title 
      <div class="font-title space-y-2"> <h2 class="text-6xl font-extrabold">Simple.</h2> <h2 class="text-6xl font-extrabold">Lightweight.</h2> <h2 class="text-6xl font-extrabold">Powerful as hell.</h2> </…
    4. .space-y-6 
      <div class="space-y-6 pt-16 text-xl">
    5. div[x-show="currentStep === 'directives'"] > .md\:flex-row.flex-col.flex:nth-child(1) > .md\:w-\[30\%\].pt-8.pb-4 
      <div class="md:w-[30%] pt-8 pb-4 md:pb-8"> <span class="text-2xl font-bold">x-data</span> <p>Declare a new Alpine component and its data for a block of HTML</p> </div>
  • serious color-contrast — Elements must meet minimum color contrast ratio thresholds 15 nodes
    Offending elements (5 of 15)
    1. .md\:flex-row.flex-col.flex:nth-child(1) > .md\:w-\[60\%\].border-b-4.md\:border-b-0 > .overflow-x-hidden.py-8.hover\:overflow-x-auto > .block.whitespace-pre:nth-child(1) > .text-\[\#48a9c1\] 
      <span class="text-[#48a9c1]">x-data</span>
    2. div[x-show="currentStep === 'directives'"] > .md\:flex-row.flex-col.flex:nth-child(2) > .md\:rounded-t-none.md\:border-t-0.md\:w-\[60\%\] > .overflow-x-hidden.py-8.hover\:overflow-x-auto > .whitespace-pre:nth-child(1) > .text-\[\#48a9c1\] 
      <span class="text-[#48a9c1]">x-bind</span>
    3. .md\:flex-row.flex-col.flex:nth-child(3) > .md\:rounded-t-none.md\:border-t-0.md\:w-\[60\%\] > .overflow-x-hidden.py-8.hover\:overflow-x-auto > .whitespace-pre:nth-child(1) > .text-\[\#48a9c1\] 
      <span class="text-[#48a9c1]">x-on</span>
    4. .block.whitespace-pre:nth-child(4) > .text-\[\#48a9c1\] 
      <span class="text-[#48a9c1]">x-text</span>
    5. div[x-show="currentStep === 'directives'"] > .md\:flex-row.flex-col.flex:nth-child(5) > .md\:rounded-t-none.md\:border-t-0.md\:w-\[60\%\] > .overflow-x-hidden.py-8.hover\:overflow-x-auto > .whitespace-pre:nth-child(1) > .text-\[\#48a9c1\] 
      <span class="text-[#48a9c1]">x-html</span>
  • moderate landmark-one-main — Document should have one main landmark 1 node
    Offending element
    1. html 
      <html lang="en">
  • moderate page-has-heading-one — Page should contain a level-one heading 1 node
    Offending element
    1. html 
      <html lang="en">
  • serious scrollable-region-focusable — Scrollable region must have keyboard access 1 node
    Offending element
    1. .overflow-x-auto 
      <div class="flex flex-col space-y-2 overflow-x-auto px-8 py-6 md:overflow-hidden">

Accessibility failures 2 of 19 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 15 nodes
  • landmark-one-main — Document does not have a main landmark. 1 node

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
2026-10-03 1.46 s 64 ms 0 1.46 s 864 ms
2026-09-26 1.50 s 65 ms 0 1.51 s 863 ms
2026-09-19 1.55 s 63 ms 0 1.56 s 863 ms
2026-09-12 1.57 s 59 ms 0 1.58 s 876 ms
2026-09-05 1.64 s 61 ms 0 1.65 s 894 ms
2026-08-29 1.69 s 61 ms 0 1.68 s 935 ms
2026-08-22 1.69 s 62 ms 0 1.68 s 948 ms
2026-08-15 1.64 s 63 ms 0 1.63 s 925 ms
2026-08-08 1.65 s 63 ms 0 1.64 s 903 ms
2026-08-01 1.66 s 65 ms 0 1.65 s 908 ms
2026-07-25 1.69 s 68 ms 0 1.68 s 912 ms
2026-07-18 1.73 s 69 ms 0 1.72 s 935 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 9, 2026, 10:11 AM UTC 92 2.87 s 0.001 4 ms 223 kB 3/3 ±0 2,452 -1% 41.8s Wayback
Oct 6, 2026, 11:20 PM UTC 95 2.62 s 0.059 0 ms 223 kB 3/3 ±0 4,076 +64% 41.5s Wayback
Oct 3, 2026, 9:07 PM UTC 97 2.43 s 0.001 2 ms 221 kB 3/3 ±5 2,481 0% 44.4s Wayback
Oct 1, 2026, 2:24 PM UTC 92 2.89 s 0.001 5 ms 223 kB 3/3 ±2 2,450 -2% 43.6s Wayback
Sep 29, 2026, 11:20 AM UTC 92 2.87 s 0.001 3 ms 223 kB 3/3 ±5 2,478 0% 43.4s Wayback
Sep 25, 2026, 11:23 AM UTC 92 2.87 s 0.001 5 ms 220 kB 3/3 ±3 2,489 0% 44.2s Wayback
Sep 23, 2026, 10:51 AM UTC 92 2.87 s 0.001 2 ms 224 kB 3/3 ±0 2,500 +1% 45.4s Wayback
Sep 21, 2026, 7:48 AM UTC 96 2.53 s 0.001 5 ms 219 kB 3/3 ±1 2,948 +19% 45.3s Wayback
Sep 18, 2026, 5:30 PM UTC 96 2.58 s 0.001 0 ms 219 kB 3/3 ±5 4,226 +70% 46.4s Wayback
Sep 16, 2026, 2:38 PM UTC 96 2.60 s 0.001 1 ms 223 kB 3/3 ±2 2,320 -7% 43.5s Wayback
Sep 14, 2026, 12:05 PM UTC 92 2.88 s 0.001 1 ms 223 kB 3/3 ±4 2,506 +1% 44.1s Wayback
Sep 12, 2026, 6:54 AM UTC 92 2.88 s 0.001 5 ms 223 kB 3/3 ±5 2,475 0% 45.2s Wayback
Sep 10, 2026, 5:38 AM UTC 96 2.45 s 0.059 0 ms 223 kB 3/3 ±10 3,374 +36% 28.2s Wayback
Sep 8, 2026, 12:55 AM UTC 92 2.88 s 0.001 2 ms 220 kB 3/3 ±2 2,459 -1% 25.4s Wayback
Sep 6, 2026, 12:38 AM UTC 92 2.78 s 0 4 ms 222 kB 3/3 ±1 2,465 -1% 30.3s Wayback
Sep 4, 2026, 10:44 AM UTC 92 2.79 s 0 12 ms 218 kB 3/3 ±2 2,440 -2% 24.3s Wayback
Sep 3, 2026, 1:08 AM UTC 93 2.96 s 0.059 4 ms 219 kB 3/3 ±5 2,444 -2% 63.4s Wayback
Sep 1, 2026, 11:24 PM UTC 97 2.45 s 0.001 0 ms 222 kB 3/3 ±19 3,313 +33% 30.6s Wayback
Aug 31, 2026, 10:30 PM UTC 92 2.88 s 0.001 4 ms 220 kB 3/3 ±7 2,465 -1% 30s Wayback
Aug 27, 2026, 6:58 PM UTC 92 2.89 s 0.001 4 ms 219 kB 3/3 ±9 2,497 0% 32.4s Wayback