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

yarnpkg.com

https://yarnpkg.com/

69PERF 93A11Y 100BEST 92SEO ✗AXE ✓CWV

Ranks Overall #1,455 Developer Tooling #52 Package Managers #10

Data from Oct 16, 2026, 5:49 AM UTC old Measured every 2 days · 24 runs since Aug 25, 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 3.7.0 Built with Docusaurus 3.7.0
Uses ReactReact
Netlify Hosted by Netlify

Filmstrip LAB Throttled

How the page drew during the measured load, at 9 points across 18.00 s. Compare this filmstrip against another site.

  1. 1.68 s
  2. 4.50 s
  3. 6.75 s
  4. 7.75 s
  5. 9.00 s
  6. 11.25 s
  7. 13.50 s
  8. 15.75 s
  9. 18.00 s

Lighthouse Scores LAB Simulated

69
Performance
↓ -3 (-4.2%)
93
Accessibility
no change
100
Best Practices
no change
92
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 (2026-09-16 → 2026-10-13), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 8.69 s poor ↓ -2267 ms (-20.7%) significant 5.89 s – 10.95 s 2.14 s good 81.9% 11.8% 6.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 197 ms good 75.6% 20.1% 4.3%
CLS CWV Cumulative Layout Shift 0.002 good → no change 0 – 0.002 0 good 93.7% 4.8% 1.5%
TBT Total Blocking Time 275 ms needs work ↑ +103 ms (+59.9%) 123 ms – 729 ms n/a —
FCP First Contentful Paint 1.09 s good ↓ -70 ms (-6.1%) 1.09 s – 5.14 s 1.83 s needs work 74.6% 15.8% 9.6%
Speed Index 2.95 s good ↓ -142 ms (-4.6%) 2.81 s – 6.40 s n/a —
TTFB Time to First Byte 620 ms good ↓ -75 ms (-10.8%) significant 615 ms – 737 ms 815 ms needs work 74.3% 17.9% 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 6.09 s
resource load delay 1.05 s
time to first byte 578 ms
element render delay 32 ms

LCP LAB Simulated vs LCP FIELD

Lab 8.69 s
Field p75 2.14 s

The lab LCP is 4.05× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 1.70 MB ↓ -2.3 kB (-0.1%) 1.70 MB – 1.70 MB
Requests 32 → no change 32 – 35
Third-party Weight 54.8 kB ↓ -3.0 kB (-5.4%) 54.7 kB – 58.2 kB
Third-party CPU 36 ms ↑ +10 ms (+38.2%) 22 ms – 112 ms
Unused JS 290 kB ↓ -1.9 kB (-0.7%) 261 kB – 292 kB
Unused CSS 50.2 kB ↑ +259 B (+0.5%) 49.8 kB – 50.3 kB

By resource type

Type Transfer Share Size Requests
image 56.9% 966 kB 10
script 35.8% 608 kB 7
stylesheet 3.4% 58.2 kB 1
font 2.7% 45.5 kB 1
other 0.7% 12.6 kB 10
document 0.4% 7.0 kB 1
Total 1.70 MB 32

Third parties 3 entities

Entity Transfer Size Main thread Simulated
datadoghq-browser-agent.com script 49.4 kB 36 ms
GitHub 5.3 kB 0 ms
browser-intake-datadoghq.eu 137 B 0 ms
Total 54.8 kB 36 ms

Without JavaScript

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

Scripts disabled
As rendered

0.6% 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 4.63 s ↑ +1287 ms (+38.5%) significant 3.34 s – 6.69 s
Long Tasks 6 ↑ +1 (+20%) 4 – 9
DOM Elements 163 → no change 163 – 163
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 7 → no change 7 – 7
A11y Failures 2 → no change 2 – 2
A11y Failing Nodes 7 → no change 7 – 7

Main thread work

Task Time Share Duration Simulated
other 68% 3.16 s
script evaluation 21% 977 ms
script parse compile 7% 303 ms
style layout 2% 99 ms
paint composite render 1% 61 ms
parse HTML 0% 22 ms
garbage collection 0% 9 ms
Total 4.63 s

Axe violations axe-core 4.13.0, full rule set

7 violating nodes across 2 rules, 174 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • critical image-alt — Images must have alternative text 6 nodes
    Offending elements (5 of 6)
    1. img[src$="icon-workspaces.png"] 
      <img class="icon_cRwW" width="200" height="180" src="/img/icon-workspaces.png">
    2. img[src$="icon-stability.png"] 
      <img class="icon_cRwW" width="200" height="180" src="/img/icon-stability.png">
    3. img[src$="icon-documentation.png"] 
      <img class="icon_cRwW" width="200" height="180" src="/img/icon-documentation.png">
    4. img[src$="icon-plugins.png"] 
      <img class="icon_cRwW" width="200" height="180" src="/img/icon-plugins.png">
    5. img[src$="icon-innovation.png"] 
      <img class="icon_cRwW" width="200" height="180" src="/img/icon-innovation.png">
  • moderate heading-order — Heading levels should only increase by one 1 node
    Offending element
    1. .col.col--4.feature_CLW0:nth-child(1) > .padding-horiz--md.text--center > h3 
      <h3>Workspaces</h3>

Accessibility failures 2 of 24 audits

  • image-alt — Image elements do not have `[alt]` attributes 6 nodes
  • heading-order — Heading elements are not in a sequentially-descending order 1 node

Best Practices failures 1 of 19 audits

  • valid-source-maps — Missing source maps for large first-party JavaScript 2 items

SEO failures 1 of 9 audits

  • image-alt — Image elements do not have `[alt]` attributes 6 items

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
2026-10-10 2.13 s 185 ms 0 1.76 s 819 ms
2026-10-03 1.93 s 208 ms 0 1.64 s 799 ms
2026-09-26 1.89 s 202 ms 0 1.58 s 767 ms
2026-09-19 1.86 s 207 ms 0 1.56 s 734 ms
2026-09-12 1.87 s 213 ms 0 1.58 s 743 ms
2026-09-05 1.98 s 218 ms 0 1.65 s 754 ms
2026-08-29 1.96 s 218 ms 0 1.66 s 778 ms
2026-08-22 1.96 s 211 ms 0 1.67 s 777 ms
2026-08-15 2.04 s 223 ms 0 1.74 s 786 ms
2026-08-08 1.96 s 233 ms 0 1.69 s 780 ms
2026-08-01 1.97 s 235 ms 0 1.70 s 788 ms
2026-07-25 2.00 s 242 ms 0 1.69 s 824 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 16, 2026, 5:49 AM UTC 69 8.69 s 0.002 275 ms 1.70 MB 3/3 ±4 2,457 -1% 68.7s Wayback
Oct 14, 2026, 1:05 AM UTC 72 10.95 s 0.002 172 ms 1.70 MB 3/3 ±11 4,167 +68% 58.2s Wayback
Oct 8, 2026, 11:24 PM UTC 70 8.61 s 0.002 232 ms 1.70 MB 3/3 ±4 2,486 0% 62.4s Wayback
Oct 6, 2026, 7:16 PM UTC 44 9.90 s 0 729 ms 1.70 MB 1/3 — 1,837 -26% 57s Wayback
Oct 3, 2026, 8:49 PM UTC 70 8.64 s 0.002 244 ms 1.70 MB 3/3 ±3 2,694 +8% 62.8s Wayback
Oct 1, 2026, 12:22 AM UTC 67 8.68 s 0.002 255 ms 1.70 MB 3/3 ±24 2,274 -9% 75s Wayback
Sep 29, 2026, 12:04 AM UTC 70 6.69 s 0.002 284 ms 1.70 MB 3/3 ±19 2,501 +1% 69.2s Wayback
Sep 25, 2026, 4:39 PM UTC 62 9.90 s 0.002 431 ms 1.70 MB 3/3 ±3 2,494 0% 61.9s Wayback
Sep 23, 2026, 3:18 PM UTC 70 8.58 s 0.002 169 ms 1.70 MB 3/3 ±21 3,282 +32% 60.4s Wayback
Sep 21, 2026, 3:01 PM UTC 71 8.53 s 0.002 123 ms 1.70 MB 3/3 ±5 3,607 +45% 57.6s Wayback
Sep 19, 2026, 8:33 AM UTC 68 8.62 s 0.002 227 ms 1.70 MB 3/3 ±12 2,507 +1% 63.4s Wayback
Sep 16, 2026, 7:01 PM UTC 66 8.73 s 0.002 361 ms 1.70 MB 3/3 ±4 2,069 -17% 71s Wayback
Sep 14, 2026, 6:12 PM UTC 71 6.76 s 0.002 249 ms 1.70 MB 3/3 ±12 2,565 +3% 68.6s Wayback
Sep 12, 2026, 3:09 PM UTC 68 8.62 s 0.002 280 ms 1.70 MB 3/3 ±13 2,546 +2% 64.8s Wayback
Sep 10, 2026, 10:43 AM UTC 63 10.03 s 0.002 457 ms 1.70 MB 3/3 ±12 2,434 -2% 30s Wayback
Sep 8, 2026, 5:40 AM UTC 61 10.69 s 0 368 ms 1.70 MB 3/3 ±17 2,366 -5% 33s Wayback
Sep 6, 2026, 12:58 AM UTC 71 6.46 s 0.002 238 ms 1.70 MB 3/3 ±15 3,289 +32% 30.4s Wayback
Sep 4, 2026, 9:24 PM UTC 66 5.89 s 0.002 371 ms 1.70 MB 3/3 ±11 2,532 +2% 30.9s Wayback
Sep 3, 2026, 7:26 PM UTC 68 8.72 s 0.002 254 ms 1.70 MB 3/3 ±10 2,487 0% 32.6s Wayback
Sep 2, 2026, 5:38 PM UTC 59 10.63 s 0 210 ms 1.70 MB 3/3 ±24 2,657 +7% 38.4s Wayback
Sep 1, 2026, 1:16 PM UTC 67 8.70 s 0.002 259 ms 1.70 MB 3/3 ±8 2,357 -5% 30.1s Wayback
Aug 31, 2026, 10:49 AM UTC 67 8.66 s 0.002 265 ms 1.70 MB 3/3 ±5 2,359 -5% 31.2s Wayback
Aug 26, 2026, 7:05 PM UTC 64 9.94 s 0.002 403 ms 1.70 MB 3/3 ±22 2,425 -3% 30.5s Wayback
Aug 25, 2026, 4:38 PM UTC 68 8.71 s 0.002 294 ms 1.70 MB 3/3 ±11 2,325 -7% 30.3s Wayback