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

vlt.io

https://www.vlt.io/

38PERF 83A11Y 92BEST 83SEO ✗AXE –CWV

Ranks Overall #1,758 Developer Tooling #90

Data from Oct 9, 2026, 2:57 AM UTC old, older than this category's 3 days freshness target Measured every 2 days · 22 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

Next.js Built with Next.js
Uses ReactReact
Vercel Hosted by Vercel

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 22.07 s. Compare this filmstrip against another site.

  1. 2.76 s
  2. 2.84 s
  3. 8.28 s
  4. 11.04 s
  5. 13.79 s
  6. 16.55 s
  7. 19.31 s
  8. 22.07 s

Lighthouse Scores LAB Simulated

38
Performance
↓ -1 (-2.6%)
83
Accessibility
no change
92
Best Practices
↑ +19 (+26%)
83
SEO
no change

Metrics LAB

No field data: the Chrome UX Report is not being collected for this project, so every figure below is from the Lighthouse run.

Metric Lab Simulated
Value Change / range Trend
LCP CWV (estimate) Largest Contentful Paint 14.53 s poor ↑ +1314 ms (+9.9%) 9.39 s – 25.22 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.001 good → no change 0.001 – 0.006
TBT Total Blocking Time 3.09 s poor ↑ +1164 ms (+60.5%) significant 1.22 s – 4.16 s
FCP First Contentful Paint 1.85 s needs work ↓ -209 ms (-10.1%) 1.74 s – 11.67 s
Speed Index 6.48 s poor ↓ -297 ms (-4.4%) 6.01 s – 11.67 s
TTFB Time to First Byte 646 ms good ↑ +20 ms (+3.2%) 609 ms – 663 ms

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 26.20 s
resource load delay 2.03 s
time to first byte 585 ms

Page weight

Metric Value Change / range Trend
Page Weight 13.01 MB ↑ +25.2 kB (+0.2%) 12.89 MB – 13.13 MB
Requests 128 ↑ +2 (+1.6%) 113 – 128
Third-party Weight 8.55 MB ↑ +10.3 kB (+0.1%) 8.53 MB – 8.55 MB
Third-party CPU 211 ms ↑ +45 ms (+27.3%) 104 ms – 330 ms
Unused JS 767 kB ↑ +1.5 kB (+0.2%) 711 kB – 789 kB
Unused CSS 12.1 kB → no change 12.1 kB – 12.1 kB

By resource type

Type Transfer Share Size Requests
media 62.9% 8.18 MB 1
script 19.8% 2.58 MB 62
image 13.7% 1.79 MB 19
font 1.3% 174 kB 5
stylesheet 0.9% 122 kB 5
document 0.8% 106 kB 3
other 0.4% 57.8 kB 29
Total 13.01 MB 128

Third parties 4 entities

Entity Transfer Size Main thread Simulated
Amazon Web Services media 8.18 MB 0 ms
Intercom 298 kB 193 ms
YouTube 67.2 kB 18 ms
Sentry 337 B 0 ms
Total 8.55 MB 211 ms

Without JavaScript

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

Scripts disabled
As rendered

96.6% of pixels differ — they have almost nothing in common. 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 11.66 s ↑ +2174 ms (+22.9%) significant 7.83 s – 11.90 s
Long Tasks 20 → no change 20 – 20
DOM Elements 1,716 → no change 1,652 – 1,716
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 18 → no change 17 – 18
A11y Failures 5 → no change 5 – 6
A11y Failing Nodes 11 → no change 11 – 13

Main thread work

Task Time Share Duration Simulated
script evaluation 53% 6.22 s
other 24% 2.77 s
style layout 12% 1.40 s
script parse compile 6% 711 ms
paint composite render 2% 237 ms
parse HTML 2% 232 ms
garbage collection 1% 87 ms
Total 11.66 s

Axe violations axe-core 4.13.0, full rule set

18 violating nodes across 8 rules, 1538 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious link-name — Links must have discernible text 5 nodes
    Offending elements
    1. .group\/item:nth-child(1) > .group-hover\/item\:text-foreground.duration-125[href$="vltpkg"] 
      <a class="group-hover/item:text-foreground text-muted-foreground text-sm transition-colors duration-125" href="https://github.com/vltpkg">
    2. .order-1 > ul > .group\/item:nth-child(2) > .group-hover\/item\:text-foreground.duration-125.transition-colors 
      <a class="group-hover/item:text-foreground text-muted-foreground text-sm transition-colors duration-125" href="https://www.linkedin.com/company/vltpkg/">
    3. .group\/item:nth-child(3) > .group-hover\/item\:text-foreground.duration-125[href$="vltpkg"] 
      <a class="group-hover/item:text-foreground text-muted-foreground text-sm transition-colors duration-125" href="https://x.com/vltpkg">
    4. .order-1 > ul > .group\/item:nth-child(4) > .group-hover\/item\:text-foreground.duration-125.transition-colors 
      <a class="group-hover/item:text-foreground text-muted-foreground text-sm transition-colors duration-125" href="https://bsky.app/profile/vlt.sh">
    5. a[href$="qdbXTqxZzZ"] 
      <a class="group-hover/item:text-foreground text-muted-foreground text-sm transition-colors duration-125" href="https://discord.gg/qdbXTqxZzZ">
  • serious scrollable-region-focusable — Scrollable region must have keyboard access 4 nodes
    Offending elements
    1. .lg\:ring-background > .bg-background.rounded-sm[data-slot="terminal"] > .overflow-x-auto.gap-\[0\.5ch\].p-4 
      <div data-slot="content" class="flex w-full flex-col gap-[0.5ch] overflow-x-auto p-4">
    2. .gap-4.flex-col.flex:nth-child(1) > .lg\:aspect-video.shadow-lg.dark\:bg-card > .lg\:min-h-0.lg\:flex-1[data-slot="terminal"] > .lg\:h-full.lg\:overflow-y-auto.overflow-x-auto 
      <div data-slot="content" class="flex w-full flex-col gap-[0.5ch] overflow-x-auto p-4 lg:h-full lg:overflow-y-auto">
    3. .gap-4.flex-col.flex:nth-child(2) > .lg\:aspect-video.shadow-lg.dark\:bg-card > .lg\:min-h-0.lg\:flex-1[data-slot="terminal"] > .lg\:h-full.lg\:overflow-y-auto.overflow-x-auto 
      <div data-slot="content" class="flex w-full flex-col gap-[0.5ch] overflow-x-auto p-4 lg:h-full lg:overflow-y-auto">
    4. .gap-4.cursor-default[data-active="false"]:nth-child(4) > .aspect-video.shadow-lg.dark\:bg-card > .min-h-0.bg-background[data-slot="terminal"] > .overflow-auto.min-h-0.gap-\[0\.5ch\] 
      <div data-slot="content" class="flex w-full flex-col gap-[0.5ch] p-4 min-h-0 flex-1 overflow-auto">
  • critical image-alt — Images must have alternative text 3 nodes
    Offending elements
    1. img[src$="luke.png"] 
      <img data-slot="avatar-image" class="aspect-square size-full" src="/images/avatars/luke.png">
    2. img[src$="jason.png"] 
      <img data-slot="avatar-image" class="aspect-square size-full" src="/images/avatars/jason.png">
    3. img[src$="ruy.png"] 
      <img data-slot="avatar-image" class="aspect-square size-full" src="/images/avatars/ruy.png">
  • critical button-name — Buttons must have discernible text 2 nodes
    Offending elements
    1. #vjs_video_3_youtube_api >>> .ytmVideoInfoChannelAvatar 
      <button class="ytmVideoInfoLink ytmVideoInfoChannelAvatar"><img class="ytCoreImageHost ytmVideoInfoChannelLogo ytCoreImageFillParentHeight ytCoreImageFillParentWidth ytCoreImageContentModeScaleAspect…
    2. .size-9 
      <button data-slot="tooltip-trigger" data-variant="outline" data-size="icon" class="focus-visible:border..." data-state="closed">
  • critical aria-allowed-attr — Elements must only use supported ARIA attributes 1 node
    Offending element
    1. #vjs_video_3_youtube_api >>> .ytmVideoInfoVideoTitle 
      <a class="ytmVideoInfoVideoTitle" aria-level="2" href="https://www.youtube.com/watch?v=2IxxSf5lcu4"><span class="ytAttributedStringHost ytmVideoInfoLink ytAttributedStringWhiteSpaceNoWrap" style="">I…
  • serious aria-input-field-name — ARIA input fields must have an accessible name 1 node
    Offending element
    1. .border-ring 
      <span role="slider" aria-valuemin="0" aria-valuemax="1000" aria-orientation="horizontal" data-orientation="horizontal" tabindex="0" data-slot="slider-thumb" class="border-ring ring-rin..." style="" d…
  • serious aria-prohibited-attr — Elements must only use permitted ARIA attributes 1 node
    Offending element
    1. #vjs_video_3_youtube_api >>> #movie_player 
      <div class="html5-video-player ytp-hide-controls ytp-exp-bottom-control-flexbox ytp-modern-caption ytp-livebadge-color unstarted-mode ytp-small-mode" tabindex="" id="movie_player" data-version="/s/pl…
  • moderate region — All page content should be contained by landmarks 1 node
    Offending element
    1. .z-50.py-2.justify-center > .\[\&\>svg\]\:pointer-events-none.\[\&\>svg\]\:size-3.\[a\&\]\:hover\:bg-accent > span 
      <span>How we made registry metadata 70% smaller</span>

Accessibility failures 5 of 31 audits

  • link-name — Links do not have a discernible name 5 nodes
  • image-alt — Image elements do not have `[alt]` attributes 3 nodes
  • aria-input-field-name — ARIA input fields do not have accessible names 1 node
  • button-name — Buttons do not have an accessible name 1 node
  • label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 1 node

Best Practices failures 3 of 17 audits

  • image-aspect-ratio — Displays images with incorrect aspect ratio 4 items
  • inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 1 item
  • valid-source-maps — Missing source maps for large first-party JavaScript 1 item

SEO failures 2 of 9 audits

  • link-text — Links do not have descriptive text 5 items
  • image-alt — Image elements do not have `[alt]` attributes 3 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
2026-09-12 → 2026-10-03 No data — 4 weeks under the CrUX reporting threshold
2026-09-05 3.90 s — 0.060 2.67 s 969 ms
2026-08-29 3.26 s 211 ms 0.080 2.49 s 861 ms
2026-08-22 3.26 s 211 ms 0.080 2.56 s 872 ms
2026-08-15 3.08 s 179 ms 0.080 2.57 s 858 ms
2026-08-08 2.83 s 141 ms 0.080 2.44 s 835 ms
2026-08-01 No data — 1 week under the CrUX reporting threshold
2026-07-25 3.80 s — 0.060 3.67 s 1.59 s
2026-07-18 3.34 s — 0.030 3.33 s 1.38 s
2026-07-11 3.33 s — 0.020 3.20 s 1.34 s
2026-07-04 3.33 s — 0.020 3.06 s 1.31 s
2026-06-13 → 2026-06-27 No data — 3 weeks under the CrUX reporting threshold

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 9, 2026, 2:57 AM UTC 38 14.53 s 0.001 3.09 s 13.01 MB 3/3 ±4 2,612 +5% 160.2s Wayback
Oct 6, 2026, 10:57 PM UTC 39 13.22 s 0.001 1.92 s 12.98 MB 3/3 ±6 2,836 +14% 181.3s Wayback
Oct 3, 2026, 9:01 PM UTC 39 10.20 s 0.001 1.96 s 12.94 MB 3/3 ±2 2,710 +9% 196.7s Wayback
Oct 1, 2026, 2:15 PM UTC 38 10.15 s 0.001 2.43 s 12.95 MB 3/3 ±4 2,480 0% 154.5s Wayback
Sep 29, 2026, 11:14 AM UTC 38 15.54 s 0.001 2.85 s 12.96 MB 3/3 ±2 2,470 -1% 154.1s Wayback
Sep 26, 2026, 9:16 AM UTC 31 25.22 s 0.001 1.22 s 12.97 MB 3/3 ±9 2,996 +20% 153.2s Wayback
Sep 23, 2026, 10:45 PM UTC 38 10.96 s 0.001 2.37 s 13.13 MB 3/3 ±5 2,483 0% 322.4s Wayback
Sep 21, 2026, 8:03 PM UTC 38 10.81 s 0.001 2.66 s 13.13 MB 3/3 ±12 2,503 +1% 314.9s Wayback
Sep 21, 2026, 7:48 AM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 104.6s
Sep 18, 2026, 8:37 PM UTC 39 16.64 s 0.001 2.76 s 13.13 MB 3/3 ±13 2,683 +8% 370.5s Wayback
Sep 16, 2026, 6:40 PM UTC 37 10.83 s 0.001 2.59 s 13.13 MB 3/3 ±2 2,494 0% 314.6s Wayback
Sep 14, 2026, 5:52 PM UTC 38 16.07 s 0.001 2.97 s 12.92 MB 3/3 ±4 2,582 +4% 199.4s Wayback
Sep 12, 2026, 6:58 AM UTC 37 11.04 s 0.001 2.47 s 12.93 MB 3/3 ±12 2,456 -1% 131.8s Wayback
Sep 10, 2026, 5:42 AM UTC 38 10.96 s 0.001 2.28 s 12.93 MB 3/3 ±2 2,468 -1% 74.5s Wayback
Sep 8, 2026, 12:59 AM UTC 36 13.88 s 0.006 3.17 s 12.92 MB 3/3 ±2 2,464 -1% 76s Wayback
Sep 6, 2026, 12:41 AM UTC 36 15.63 s 0.001 2.03 s 12.90 MB 3/3 ±0 3,197 +29% 75s Wayback
Sep 4, 2026, 6:16 PM UTC 36 11.26 s 0.001 3.07 s 12.91 MB 3/3 ±1 2,399 -4% 88.5s Wayback
Sep 3, 2026, 11:58 AM UTC 36 13.66 s 0.001 2.49 s 12.90 MB 3/3 ±7 3,311 +33% 79.8s Wayback
Sep 3, 2026, 1:10 AM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 63.3s
Sep 1, 2026, 11:06 PM UTC 32 12.67 s 0.001 2.67 s 12.90 MB 3/3 ±2 2,382 -4% 81.9s Wayback
Aug 31, 2026, 9:23 PM UTC 34 9.39 s 0.003 3.15 s 12.90 MB 3/3 ±2 2,471 -1% 86.3s Wayback
Aug 27, 2026, 6:59 PM UTC 34 12.57 s 0.003 4.16 s 12.89 MB 3/3 ±3 2,469 -1% 89.4s Wayback