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.

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eslint.org

https://eslint.org/

78PERF 97A11Y 100BEST 100SEO !AXE !CWV

Ranks Overall #1,091 Built Awesome #765 Developer Tooling #28 Test Runners #4

Data from Oct 7, 2026, 10:49 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

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Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 9.48 s. Compare this filmstrip against another site.

  1. 1.19 s
  2. 1.63 s
  3. 3.55 s
  4. 4.74 s
  5. 5.92 s
  6. 7.11 s
  7. 8.29 s
  8. 9.48 s

Lighthouse Scores LAB Simulated

78
Performance
↑ +2 (+2.6%)
97
Accessibility
no change
100
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 (2026-09-08 → 2026-10-05), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 3.40 s needs work ↓ -2205 ms (-39.3%) significant 2.94 s – 7.21 s 1.85 s good 82.6% 11% 6.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 119 ms good 88.5% 11.5% 0%
CLS CWV Cumulative Layout Shift 0.261 poor ↑ +0.258 (+8600%) 0 – 0.277 0.180 needs work 69.5% 10.6% 19.9%
TBT Total Blocking Time 65 ms good ↑ +8 ms (+14%) 36 ms – 148 ms n/a —
FCP First Contentful Paint 1.52 s good ↓ -893 ms (-36.9%) 1.01 s – 2.66 s 1.70 s good 79.1% 11.5% 9.4%
Speed Index 2.08 s good ↓ -339 ms (-14%) 1.64 s – 4.61 s n/a —
TTFB Time to First Byte 625 ms good ↑ +18 ms (+3%) 604 ms – 671 ms 821 ms needs work 72.9% 22% 5.1%

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 1.08 s
time to first byte 589 ms

LCP LAB Simulated vs LCP FIELD

Lab 3.40 s
Field p75 1.85 s

The lab LCP is 1.84× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 1.10 MB ↓ -521 B 914 kB – 1.14 MB
Requests 30 → no change 30 – 37
Third-party Weight 565 kB ↓ -490 B (-0.1%) 375 kB – 605 kB
Third-party CPU 89 ms ↑ +12 ms (+15.2%) 62 ms – 92 ms
Unused JS 74.0 kB ↑ +245 B (+0.3%) 68.9 kB – 74.0 kB
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
font 47.7% 523 kB 6
image 27.8% 305 kB 7
script 21.3% 233 kB 10
document 1.6% 17.9 kB 1
stylesheet 1.5% 16.1 kB 1
other 0.1% 998 B 2
Total 1.10 MB 30

Third parties 5 entities

Entity Transfer Size Main thread Simulated
GitHub image 273 kB 0 ms
Google Tag Manager script 173 kB 59 ms
JSDelivr CDN font 78.7 kB 0 ms
Cloudflare CDN 35.4 kB 30 ms
opencollective.com 4.8 kB 0 ms
Total 565 kB 89 ms

Without JavaScript

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

Scripts disabled
As rendered

3.4% 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 1.46 s ↑ +294 ms (+25.3%) significant 917 ms – 1.58 s
Long Tasks 3 ↓ -2 (-40%) significant 2 – 5
DOM Elements 567 → no change 567 – 578
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 4 → no change 4 – 4
A11y Failures 1 → no change 1 – 1
A11y Failing Nodes 3 → no change 3 – 3

Main thread work

Task Time Share Duration Simulated
other 29% 429 ms
script evaluation 28% 410 ms
style layout 24% 342 ms
paint composite render 10% 148 ms
script parse compile 6% 92 ms
parse HTML 2% 34 ms
Total 1.46 s

Axe violations axe-core 4.13.0, full rule set

4 violating nodes across 2 rules, 1119 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious aria-prohibited-attr — Elements must only use permitted ARIA attributes 3 nodes
    Offending elements
    1. div[aria-label="27.6 million Dependents"]
      <div class="metrics__item" aria-label="27.6 million Dependents"> <span class="metrics__value" aria-hidden="true">27.6M</span> <span aria-hidden="true">Dependents</span> </div>
    2. div[aria-label="198.2 million Weekly Downloads"]
      <div class="metrics__item" aria-label="198.2 million Weekly Downloads"> <span class="metrics__value" aria-hidden="true">198.2M</span> <span aria-hidden="true">Weekly Downloads</span> </div>
    3. div[aria-label="27.6 thousand Stars"]
      <div class="metrics__item" aria-label="27.6 thousand Stars"> <span class="metrics__value" aria-hidden="true">27.6K</span> <span aria-hidden="true">Stars</span> </div>
  • moderate region — All page content should be contained by landmarks 1 node
    Offending element
    1. .deprecation-notice
      <div class="deprecation-notice">

Accessibility failures 1 of 33 audits

  • aria-prohibited-attr — Elements use prohibited ARIA attributes 3 nodes

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 1.97 s 120 ms 0.210 1.68 s 778 ms
2026-09-19 1.85 s 112 ms 0.160 1.67 s 801 ms
2026-09-12 1.81 s 112 ms 0.060 1.63 s 752 ms
2026-09-05 1.57 s 105 ms 0.010 1.50 s 658 ms
2026-08-29 1.48 s 104 ms 0.010 1.45 s 658 ms
2026-08-22 1.47 s 106 ms 0.010 1.43 s 618 ms
2026-08-15 1.49 s 99 ms 0.010 1.48 s 638 ms
2026-08-08 1.48 s 92 ms 0.010 1.43 s 637 ms
2026-08-01 1.60 s 94 ms 0.160 1.56 s 692 ms
2026-07-25 1.65 s 92 ms 0.130 1.59 s 721 ms
2026-07-18 1.91 s 96 ms 0.190 1.65 s 730 ms
2026-07-11 1.91 s 103 ms 0.220 1.74 s 780 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 7, 2026, 10:49 PM UTC 78 3.40 s 0.261 65 ms 1.10 MB 3/3 ±12 2,455 -1% 58.6s Wayback
Oct 5, 2026, 5:58 PM UTC 76 5.61 s 0.003 57 ms 1.10 MB 3/3 ±2 2,463 -1% 58.8s Wayback
Oct 1, 2026, 12:28 AM UTC 84 4.20 s 0.004 74 ms 1.14 MB 3/3 ±1 2,474 0% 56.3s Wayback
Sep 29, 2026, 12:03 AM UTC 70 4.47 s 0.268 54 ms 1.14 MB 3/3 ±4 2,462 -1% 59.2s Wayback
Sep 25, 2026, 4:50 PM UTC 79 4.76 s 0.005 60 ms 1.14 MB 3/3 ±5 2,484 0% 56.7s Wayback
Sep 23, 2026, 10:54 AM UTC 74 3.89 s 0.277 36 ms 1.14 MB 3/3 ±6 3,362 +35% 59.4s Wayback
Sep 21, 2026, 7:43 AM UTC 76 5.22 s 0 136 ms 1.14 MB 3/3 ±7 2,486 0% 58.1s Wayback
Sep 18, 2026, 5:37 PM UTC 72 6.26 s 0.012 58 ms 919 kB 3/3 ±13 2,920 +17% 55s Wayback
Sep 16, 2026, 9:18 AM UTC 76 5.33 s 0.012 132 ms 917 kB 3/3 ±3 2,078 -16% 57.2s Wayback
Sep 14, 2026, 5:58 AM UTC 72 6.17 s 0.016 106 ms 918 kB 3/3 ±8 3,215 +29% 55.4s Wayback
Sep 11, 2026, 11:30 PM UTC 71 4.39 s 0.261 52 ms 916 kB 3/3 ±8 2,338 -6% 59.6s Wayback
Sep 9, 2026, 8:32 PM UTC 70 4.69 s 0.261 61 ms 916 kB 3/3 ±4 2,353 -5% 29.4s Wayback
Sep 7, 2026, 7:06 PM UTC 76 5.33 s 0.009 113 ms 916 kB 3/3 ±3 2,320 -7% 25.9s Wayback
Sep 5, 2026, 3:57 PM UTC 76 3.63 s 0.275 60 ms 916 kB 3/3 ±8 2,540 +2% 29.6s Wayback
Sep 4, 2026, 10:53 AM UTC 77 5.11 s 0.009 141 ms 916 kB 3/3 ±12 2,488 0% 26.9s Wayback
Sep 3, 2026, 1:11 AM UTC 81 2.94 s 0.261 36 ms 918 kB 3/3 ±12 2,912 +17% 23.9s Wayback
Sep 1, 2026, 11:11 PM UTC 74 3.94 s 0.268 55 ms 916 kB 3/3 ±9 2,654 +7% 29.8s Wayback
Aug 31, 2026, 9:28 PM UTC 76 5.34 s 0 120 ms 916 kB 3/3 ±14 2,460 -1% 27.5s Wayback
Aug 27, 2026, 4:16 AM UTC 75 3.74 s 0.272 42 ms 916 kB 3/3 ±10 2,973 +20% 24.7s Wayback
Aug 26, 2026, 1:14 AM UTC 74 3.93 s 0.272 40 ms 914 kB 3/3 ±4 3,036 +22% 27.3s Wayback
Aug 25, 2026, 1:12 AM UTC 81 4.68 s 0 83 ms 914 kB 3/3 ±8 2,498 0% 25.8s Wayback
Aug 23, 2026, 11:21 PM UTC 75 5.33 s 0 125 ms 1.14 MB 3/3 ±10 2,493 0% 26.2s Wayback
Aug 22, 2026, 11:19 PM UTC 74 5.93 s 0.011 148 ms 1.14 MB 3/3 ±12 2,447 -2% 28.7s Wayback
Aug 21, 2026, 10:23 PM UTC 70 7.21 s 0 139 ms 1.14 MB 3/3 ±3 2,948 +19% 26.1s Wayback
Aug 20, 2026, 9:31 PM UTC 72 4.16 s 0.273 38 ms 1.11 MB 3/3 ±19 3,238 +30% 26.2s Wayback

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