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

gruntjs.com

https://gruntjs.com/

100PERF 73A11Y 96BEST 92SEO ✗AXE ✓CWV

Ranks Overall #1,448 Developer Tooling #54 Test Runners #10

Data from Oct 6, 2026, 11:05 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

The measuring machine was faster than most in this project.

Lighthouse benchmark index was 3,456, 39% faster than this project's median of 2,486. CPU-bound metrics — TBT, TTI, main thread work — are affected by this and may have moved without the site changing at all.

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

Stack

Cloudflare Hosted by Cloudflare

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 8.85 s. Compare this filmstrip against another site.

  1. 1.11 s
  2. 1.72 s
  3. 3.32 s
  4. 4.42 s
  5. 5.53 s
  6. 6.64 s
  7. 7.74 s
  8. 8.85 s

Lighthouse Scores LAB Simulated

100
Performance
no change
73
Accessibility
no change
96
Best Practices
no change
92
SEO
no change

Metrics LAB FIELD

Core Web Vitals: passing 2 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), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 1.37 s good ↑ +3 ms (+0.2%) 1.23 s – 1.38 s 961 ms good 97.8% 0.9% 1.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — — —
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0 0 good 93.5% 4.2% 2.3%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 1.07 s good ↑ +3 ms (+0.3%) 1.06 s – 1.10 s 961 ms good 95.8% 2.5% 1.7%
Speed Index 1.07 s good ↑ +3 ms (+0.3%) 1.06 s – 1.10 s n/a —
TTFB Time to First Byte 620 ms good ↑ +3 ms (+0.5%) 600 ms – 654 ms 565 ms good 88.5% 9.3% 2.2%

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 1.13 s
time to first byte 588 ms

LCP LAB Simulated vs LCP FIELD

Lab 1.37 s
Field p75 961 ms

The lab LCP is 1.43× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 101 kB ↑ +463 B (+0.5%) 101 kB – 102 kB
Requests 24 → no change 24 – 65
Third-party Weight 0 B → no change 0 B – 0 B
Third-party CPU 0 ms → no change 0 ms – 0 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 12.7 kB → no change 12.7 kB – 12.7 kB

By resource type

Type Transfer Share Size Requests
image 78.3% 76.8 kB 19
stylesheet 15.2% 14.9 kB 1
document 3.3% 3.2 kB 1
font 3% 2.9 kB 1
other 0.3% 290 B 1
Total 101 kB 24

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 281 ms ↓ -19 ms (-6.5%) 240 ms – 454 ms
Long Tasks 0 → no change 0 – 1
DOM Elements 185 → no change 185 – 185
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 32 → no change 29 – 32
A11y Failures 4 → no change 4 – 4
A11y Failing Nodes 28 → no change 28 – 28

Main thread work

Task Time Share Duration Simulated
other 47% 132 ms
style layout 42% 119 ms
paint composite render 4% 13 ms
parse HTML 3% 9 ms
script evaluation 3% 8 ms
script parse compile 0% 1 ms
Total 281 ms

Axe violations axe-core 4.13.0, full rule set

32 violating nodes across 6 rules, 363 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 15 nodes
    Offending elements (5 of 15)
    1. .pull-left > p > a[href$="sample-gruntfile"] 
      <a href="/sample-gruntfile">Gruntfile</a>
    2. .why.pull-right > p > a[href$="getting-started"] 
      <a href="/getting-started">get started</a>
    3. p > a[href$="plugins"] 
      <a href="/plugins">plugin listing</a>
    4. p > a[href$="who-uses-grunt"] 
      <a href="/who-uses-grunt">See more here.</a>
    5. .how-get-started > p > a[href$="getting-started"] 
      <a href="/getting-started">Getting Started</a>
  • serious link-in-text-block — Links must be distinguishable without relying on color 11 nodes
    Offending elements (5 of 11)
    1. .pull-left > p > a[href$="sample-gruntfile"] 
      <a href="/sample-gruntfile">Gruntfile</a>
    2. p > a[href$="plugins"] 
      <a href="/plugins">plugin listing</a>
    3. p > a[href$="who-uses-grunt"] 
      <a href="/who-uses-grunt">See more here.</a>
    4. .how-get-started > p > a[href$="getting-started"] 
      <a href="/getting-started">Getting Started</a>
    5. .how-get-started > p > a[href$="sample-gruntfile"] 
      <a href="/sample-gruntfile">Sample Gruntfile</a>
  • moderate region — All page content should be contained by landmarks 3 nodes
    Offending elements
    1. .banner 
      <div class="banner"> <a href="support">V1.6.1 is the current version, and previous versions are not supported. Upgrade to the latest version or consider other support options.</a></div>
    2. .nav 
      <ul class="nav">
    3. .content 
      <div class="content">
  • moderate landmark-one-main — Document should have one main landmark 1 node
    Offending element
    1. html 
      <html lang="en" prefix="og: http://ogp.me/ns#" itemscope="" itemtype="http://schema.org/WebPage">
  • serious link-name — Links must have discernible text 1 node
    Offending element
    1. .brand 
      <a class="brand" href="/"><span class="logo"></span></a>
  • moderate page-has-heading-one — Page should contain a level-one heading 1 node
    Offending element
    1. html 
      <html lang="en" prefix="og: http://ogp.me/ns#" itemscope="" itemtype="http://schema.org/WebPage">

Accessibility failures 4 of 14 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 15 nodes
  • link-in-text-block — Links rely on color to be distinguishable. 11 nodes
  • link-name — Links do not have a discernible name 1 node
  • landmark-one-main — Document does not have a main landmark. 1 node

Best Practices failures 1 of 18 audits

  • image-size-responsive — Serves images with low resolution 16 items

SEO failures 1 of 9 audits

  • meta-description — Document does not have a meta description

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
2026-10-03 939 ms — 0 940 ms 535 ms
2026-04-18 → 2026-09-26 No data — 24 weeks under the CrUX reporting threshold

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 6, 2026, 11:05 PM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 3,456 +39% 38.6s Wayback
Oct 3, 2026, 8:49 PM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,877 +16% 39.6s Wayback
Oct 1, 2026, 6:59 AM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,322 -7% 41.5s Wayback
Sep 29, 2026, 5:00 AM UTC 100 1.38 s 0 0 ms 101 kB 3/3 ±0 2,308 -7% 43.1s Wayback
Sep 25, 2026, 11:23 AM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,338 -6% 40.4s Wayback
Sep 23, 2026, 10:53 AM UTC 100 1.36 s 0 0 ms 101 kB 3/3 ±0 2,447 -2% 41.2s Wayback
Sep 21, 2026, 7:42 AM UTC 100 1.24 s 0 0 ms 102 kB 3/3 ±0 2,476 0% 42.2s Wayback
Sep 18, 2026, 1:39 PM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,479 0% 42.3s Wayback
Sep 16, 2026, 9:12 AM UTC 100 1.23 s 0 0 ms 101 kB 3/3 ±0 4,425 +78% 37.4s Wayback
Sep 14, 2026, 5:55 AM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,493 0% 41.2s Wayback
Sep 11, 2026, 11:14 PM UTC 100 1.38 s 0 0 ms 101 kB 3/3 ±1 2,487 0% 42.9s Wayback
Sep 9, 2026, 8:38 PM UTC 100 1.38 s 0 0 ms 101 kB 3/3 ±0 3,417 +37% 21.5s Wayback
Sep 7, 2026, 7:15 PM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,477 0% 22.1s Wayback
Sep 5, 2026, 8:05 AM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,304 -7% 22.4s Wayback
Sep 4, 2026, 12:59 AM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 3,080 +24% 21.6s Wayback
Sep 2, 2026, 11:09 PM UTC 100 1.38 s 0 0 ms 101 kB 3/3 ±0 2,313 -7% 22.4s Wayback
Sep 1, 2026, 8:52 PM UTC 100 1.36 s 0 0 ms 101 kB 3/3 ±0 2,992 +20% 21.1s Wayback
Aug 31, 2026, 6:06 PM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,345 -6% 22.1s Wayback
Aug 27, 2026, 2:31 PM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,469 -1% 22.2s Wayback
Aug 26, 2026, 4:39 AM UTC 100 1.25 s 0 0 ms 101 kB 3/3 ±0 2,935 +18% 22.6s Wayback
Aug 25, 2026, 3:53 AM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,485 0% 22.4s Wayback
Aug 24, 2026, 3:03 AM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,510 +1% 23.4s Wayback
Aug 23, 2026, 1:16 AM UTC 100 1.36 s 0 0 ms 101 kB 3/3 ±0 2,427 -2% 22.7s Wayback
Aug 22, 2026, 1:09 AM UTC 100 1.37 s 0 0 ms 101 kB 3/3 ±0 2,472 -1% 26.3s Wayback
Aug 20, 2026, 11:29 PM UTC 100 1.36 s 0 0 ms 101 kB 3/3 ±0 2,423 -3% 21.8s Wayback