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

webdriver.io

https://webdriver.io/

81PERF 90A11Y 96BEST 100SEO ✗AXE !CWV

Ranks Overall #1,613 Developer Tooling #65 Test Runners #11

Data from Oct 6, 2026, 7:06 PM UTC old Measured every 2 days · 27 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

Docusaurus 3.10.2 Built with Docusaurus 3.10.2
Uses ReactReact
Vercel Hosted by Vercel

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 12.11 s. Compare this filmstrip against another site.

  1. 1.51 s
  2. 2.85 s
  3. 4.54 s
  4. 6.05 s
  5. 7.57 s
  6. 9.08 s
  7. 10.59 s
  8. 12.11 s

Lighthouse Scores LAB Simulated

81
Performance
↑ +34 (+72.3%)
90
Accessibility
↑ +2 (+2.3%)
96
Best Practices
no change
100
SEO
no change

Metrics LAB FIELD

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

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-07 → 2026-10-04), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 4.63 s poor ↓ -15469 ms (-76.9%) significant 4.63 s – 27.09 s 1.68 s good 83.7% 8.9% 7.4%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 240 ms needs work site-wide 68.6% 22% 9.5%
CLS CWV Cumulative Layout Shift 0.028 good ↑ +0.026 (+1300%) 0.002 – 0.093 0.010 good 98.1% 2% 0%
TBT Total Blocking Time 107 ms good ↓ -753 ms (-87.6%) significant 107 ms – 1.56 s n/a —
FCP First Contentful Paint 1.23 s good ↓ -1779 ms (-59.1%) significant 1.23 s – 17.14 s 1.38 s good 80.7% 8.9% 10.4%
Speed Index 3.87 s needs work ↓ -865 ms (-18.3%) 3.01 s – 17.14 s n/a —
TTFB Time to First Byte 632 ms good ↑ +22 ms (+3.6%) 602 ms – 632 ms 727 ms good 76.6% 14.1% 9.2%

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 2.26 s
time to first byte 588 ms

LCP LAB Simulated vs LCP FIELD

Lab 4.63 s
Field p75 1.68 s

The lab LCP is 2.76× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 9.05 MB ↓ -2671.6 kB (-23.2%) significant 9.05 MB – 11.81 MB
Requests 174 ↓ -16 (-8.4%) significant 174 – 196
Third-party Weight 5.39 MB ↓ -198.0 kB (-3.6%) 4.66 MB – 5.60 MB
Third-party CPU 0 ms ↓ -86 ms (-100%) significant 0 ms – 161 ms
Unused JS 210 kB ↓ -642.0 kB (-75.8%) significant 210 kB – 1.01 MB
Unused CSS 37.1 kB ↓ -35.5 kB (-49.5%) significant 37.1 kB – 73.5 kB

By resource type

Type Transfer Share Size Requests
image 91.7% 8.30 MB 141
script 5.5% 501 kB 7
font 1% 89.2 kB 2
other 0.9% 81.2 kB 19
stylesheet 0.6% 57.6 kB 1
document 0.2% 17.9 kB 1
Total 9.05 MB 174

Third parties 2 entities

Entity Transfer Size Main thread Simulated
GitHub image 5.39 MB 0 ms
mendable.ai 723 B 0 ms
Total 5.39 MB 0 ms

Without JavaScript

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

Scripts disabled
As rendered

20.6% 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 3.28 s ↓ -1835 ms (-35.9%) 3.28 s – 21.89 s
Long Tasks 3 ↓ -4 (-57.1%) 3 – 20
DOM Elements 1,497 ↑ +302 (+25.3%) significant 1,187 – 1,497
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 53 ↑ +1 (+1.9%) 52 – 54
A11y Failures 4 → no change 4 – 4
A11y Failing Nodes 131 ↑ +23 (+21.3%) significant 107 – 131

Main thread work

Task Time Share Duration Simulated
other 42% 1.37 s
script evaluation 23% 745 ms
style layout 23% 739 ms
paint composite render 7% 237 ms
script parse compile 4% 132 ms
parse HTML 1% 35 ms
garbage collection 1% 22 ms
Total 3.28 s

Axe violations axe-core 4.13.0, full rule set

53 violating nodes across 3 rules, 2761 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
    Offending elements (5 of 43)
    1. .heroText_Ug_O > .heroActions_kdR1 > .button--primary.primaryButton_rESM.button 
      <a class="button button--primary button--lg primaryButton_rESM" href="/docs/gettingstarted">Get Started</a>
    2. .section_v95j:nth-child(2) > .sectionHeader_aVBW > .eyebrow_WWDV 
      <span class="eyebrow_WWDV">One API</span>
    3. .token-line:nth-child(1) > .string.token 
      <span class="token string" style="color: rgb(227, 17, 108);">'@wdio/globals'</span>
    4. .token-line:nth-child(3) > .function.token 
      <span class="token function" style="color: rgb(215, 58, 73);">describe</span>
    5. .token-line:nth-child(3) > .string.token 
      <span class="token string" style="color: rgb(227, 17, 108);">'webdriver.io'</span>
  • serious link-in-text-block — Links must be distinguishable without relying on color 9 nodes
    Offending elements (5 of 9)
    1. .sponsors > p:nth-child(2) > a[href$="openjsf.org/"] 
      <a href="https://openjsf.org/">OpenJS Foundation</a>
    2. a[href$="linuxfoundation.org/"] 
      <a href="https://linuxfoundation.org/">Linux Foundation</a>
    3. p:nth-child(4) > a[href$="sponsor"] 
      <a href="/docs/sponsor">becoming a sponsor</a>
    4. a[href$="openjsf.org"]:nth-child(1) 
      <a href="https://openjsf.org">OpenJS Foundation</a>
    5. a[href$="openjsf.org"]:nth-child(2) 
      <a href="https://openjsf.org">OpenJS Foundation</a>
  • moderate region — All page content should be contained by landmarks 1 node
    Offending element
    1. #ms-floating-button 
      <div id="ms-floating-button" class=" ms-fixed ms-bottom-4 ms-right-8 ms-z-[100] ms-flex ms-flex-col ms-items-end hover:ms-cursor-pointer">

Accessibility failures 4 of 32 audits

  • target-size — Touch targets do not have sufficient size or spacing. 78 nodes
  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 43 nodes
  • link-in-text-block — Links rely on color to be distinguishable. 9 nodes
  • label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 1 node

Best Practices failures 2 of 19 audits

  • errors-in-console — Browser errors were logged to the console 2 items
  • valid-source-maps — Missing source maps for large first-party JavaScript 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 2 console errors

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-10-03 1.58 s 249 ms 0.010 1.35 s 662 ms
2026-09-26 1.68 s 290 ms 0.010 1.35 s 599 ms
2026-09-19 1.65 s 256 ms 0.010 1.42 s 567 ms
2026-09-12 1.68 s 256 ms 0.010 1.42 s 558 ms
2026-09-05 1.92 s 241 ms 0.010 1.57 s 576 ms
2026-08-29 1.76 s 218 ms 0.010 1.49 s 558 ms
2026-08-22 1.96 s 255 ms 0.010 1.72 s 558 ms
2026-08-15 2.07 s 252 ms 0.020 1.79 s 591 ms
2026-08-08 2.11 s 277 ms 0.010 1.79 s 570 ms
2026-08-01 2.19 s 186 ms 0.010 2.03 s 655 ms
2026-07-25 1.98 s 186 ms 0.010 1.71 s 510 ms
2026-07-18 2.13 s 171 ms 0.010 1.76 s 529 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 6, 2026, 7:06 PM UTC 81 4.63 s 0.028 107 ms 9.05 MB 3/3 ±15 3,281 +32% 130.2s Wayback
Oct 3, 2026, 8:40 PM UTC 47 20.10 s 0.002 860 ms 11.79 MB 3/3 ±2 2,661 +7% 130.2s Wayback
Sep 30, 2026, 8:39 PM UTC 46 13.90 s 0.093 1.01 s 11.81 MB 3/3 ±7 2,510 +1% 119s Wayback
Sep 28, 2026, 6:39 PM UTC 42 21.41 s 0.002 775 ms 11.79 MB 3/3 ±13 2,449 -1% 116.5s Wayback
Sep 25, 2026, 12:39 AM UTC 53 20.21 s 0.002 553 ms 11.80 MB 3/3 ±4 2,980 +20% 111.2s Wayback
Sep 23, 2026, 12:07 AM UTC 39 14.59 s 0.093 1.25 s 11.79 MB 3/3 ±10 2,470 -1% 120.2s Wayback
Sep 20, 2026, 11:17 PM UTC 44 15.76 s 0.093 985 ms 11.79 MB 3/3 ±7 2,491 0% 117.3s Wayback
Sep 18, 2026, 5:30 PM UTC 45 20.18 s 0.002 1.13 s 11.48 MB 3/3 ±5 2,458 -1% 122.2s Wayback
Sep 16, 2026, 2:36 PM UTC 53 20.07 s 0.002 599 ms 11.52 MB 3/3 ±4 2,995 +20% 108.4s Wayback
Sep 14, 2026, 12:03 PM UTC 47 14.81 s 0.093 1.01 s 10.92 MB 3/3 ±4 2,461 -1% 141.8s Wayback
Sep 12, 2026, 6:53 AM UTC 38 18.25 s 0.093 1.31 s 10.88 MB 3/3 ±8 2,409 -3% 122.6s Wayback
Sep 10, 2026, 5:38 AM UTC 42 18.40 s 0.013 1.19 s 10.88 MB 3/3 ±6 1,692 -32% 163.5s Wayback
Sep 8, 2026, 12:57 AM UTC 42 18.24 s 0.093 1.18 s 10.88 MB 3/3 ±2 2,476 0% 53.5s Wayback
Sep 6, 2026, 12:39 AM UTC 46 13.59 s 0.092 906 ms 10.88 MB 3/3 ±9 3,007 +21% 47.4s Wayback
Sep 4, 2026, 6:13 PM UTC 46 20.53 s 0.002 777 ms 10.85 MB 3/3 ±1 2,348 -6% 48.9s Wayback
Sep 3, 2026, 11:56 AM UTC 36 26.12 s 0.002 951 ms 10.87 MB 3/3 ±17 3,277 +32% 50.7s Wayback
Sep 3, 2026, 1:08 AM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 42.3s
Sep 1, 2026, 11:02 PM UTC 50 19.92 s 0.002 755 ms 11.24 MB 3/3 ±3 2,288 -8% 130.2s Wayback
Aug 31, 2026, 9:19 PM UTC 43 18.13 s 0.093 1.05 s 11.23 MB 2/3 ±3 2,465 -1% 140.4s Wayback
Aug 27, 2026, 4:19 PM UTC 44 13.84 s 0.093 709 ms 10.90 MB 3/3 ±11 2,459 -1% 88.2s Wayback
Aug 26, 2026, 10:46 PM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 100.9s
Aug 25, 2026, 9:19 PM UTC 43 20.09 s 0.002 1.56 s 10.88 MB 3/3 ±3 2,159 -13% 55.8s Wayback
Aug 25, 2026, 7:31 PM UTC 45 20.10 s 0.013 1.09 s 10.88 MB 3/3 ±8 2,345 -6% 120.3s Wayback
Aug 24, 2026, 6:38 PM UTC 40 27.09 s 0.013 583 ms 11.43 MB 3/3 ±9 3,749 +51% 83.1s Wayback
Aug 23, 2026, 6:30 PM UTC 41 15.10 s 0.093 795 ms 11.43 MB 3/3 ±1 2,482 0% 53.5s Wayback
Aug 22, 2026, 5:24 PM UTC 39 21.36 s 0.002 891 ms 11.43 MB 3/3 ±6 2,289 -8% 53s Wayback
Aug 21, 2026, 5:12 PM UTC 40 21.34 s 0.002 930 ms 11.43 MB 3/3 ±8 2,490 0% 54.4s Wayback