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

crates.io

https://crates.io/

94PERF 96A11Y 100BEST 92SEO ✗AXE ✗CWV

Ranks Overall #1,717 Developer Tooling #79 Package Managers #13

Data from Oct 16, 2026, 3:18 PM UTC old Measured every 2 days · 23 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

SvelteKit Built with SvelteKit
Uses SvelteSvelte
He Hosted by Heroku

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 4.58 s. Compare this filmstrip against another site.

  1. 572 ms
  2. 1.15 s
  3. 1.72 s
  4. 2.29 s
  5. 2.86 s
  6. 3.43 s
  7. 4.01 s
  8. 4.58 s

Lighthouse Scores LAB Simulated

94
Performance
no change
96
Accessibility
no change
100
Best Practices
no change
92
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 (2026-09-17 → 2026-10-14), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 2.85 s needs work ↑ +40 ms (+1.4%) 2.75 s – 2.85 s 1.88 s good 85.7% 9.1% 5.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 99 ms good 94.4% 4.4% 1.3%
CLS CWV Cumulative Layout Shift 0.011 good → no change 0.001 – 0.011 0.290 poor 60.8% 12.5% 26.7%
TBT Total Blocking Time 112 ms good ↓ -27 ms (-19.4%) significant 32 ms – 139 ms n/a —
FCP First Contentful Paint 1.58 s good ↑ +6 ms (+0.4%) 1.51 s – 1.59 s 1.77 s good 75.6% 15.2% 9.2%
Speed Index 1.58 s good ↑ +6 ms (+0.4%) 1.51 s – 1.59 s n/a —
TTFB Time to First Byte 609 ms good ↑ +6 ms (+1%) 602 ms – 620 ms 996 ms needs work 66% 27.2% 6.9%

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 3.00 s
time to first byte 573 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.85 s
Field p75 1.88 s

The lab LCP is 1.52× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 213 kB ↑ +4.7 kB (+2.3%) 200 kB – 213 kB
Requests 69 ↑ +1 (+1.5%) 63 – 69
Third-party Weight 6.2 kB ↓ -121 B (-1.9%) 6.2 kB – 6.4 kB
Third-party CPU 0 ms → no change 0 ms – 0 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
script 44.7% 93.0 kB 40
font 35.8% 74.5 kB 3
stylesheet 8.8% 18.4 kB 8
other 8.4% 17.6 kB 4
image 1.1% 2.3 kB 1
document 1.1% 2.3 kB 1
Total 213 kB 69

Third parties 1 entities

Entity Transfer Size Main thread Simulated
rust-lang.org other 6.2 kB 0 ms
Total 6.2 kB 0 ms

Without JavaScript

This page is client rendered.

Nothing was painted until the scripts ran. This is a web performance and robustness issue!

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

Scripts disabled
As rendered

76.5% of pixels differ — the page changes substantially. 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 1.04 s ↓ -241 ms (-18.9%) significant 568 ms – 1.29 s
Long Tasks 2 ↓ -1 (-33.3%) 1 – 3
DOM Elements 658 → no change 658 – 658
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 100 → no change 100 – 100
A11y Failures 2 → no change 2 – 2
A11y Failing Nodes 160 → no change 160 – 160

Main thread work

Task Time Share Duration Simulated
other 36% 374 ms
script evaluation 30% 316 ms
style layout 19% 199 ms
parse HTML 7% 72 ms
paint composite render 7% 71 ms
script parse compile 1% 6 ms
Total 1.04 s

Axe violations axe-core 4.13.0, full rule set

100 violating nodes across 1 rule, 1422 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 100 nodes
    Offending elements (5 of 100)
    1. #c5-subtitle 
      <div class="subtitle svelte-124xg1a" id="c5-subtitle">Dioxus-based ArkUI application framework for OpenHarmony <span class="anchor svelte-11extwn"></span> <!----><!----></div>
    2. #c5-trailing > span:nth-child(2) 
      <span>0.0.1-beta.0</span>
    3. #c6-subtitle 
      <div class="subtitle svelte-124xg1a" id="c6-subtitle">Embedded terminal for arkit powered by rio-vt and a wgpu cell renderer <span class="anchor svelte-11extwn"></span> <!----><!----></div>
    4. #c6-trailing > span:nth-child(2) 
      <span>0.0.1-beta.0</span>
    5. #c7-subtitle 
      <div class="subtitle svelte-124xg1a" id="c7-subtitle">Shadcn-style native ArkUI components for Arkit applications <span class="anchor svelte-11extwn"></span> <!----><!----></div>

Accessibility failures 2 of 27 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 100 nodes
  • label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 60 nodes

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
2026-10-10 1.89 s 101 ms 0.290 1.77 s 996 ms
2026-10-03 1.95 s 104 ms 0.250 1.81 s 975 ms
2026-09-26 1.90 s 106 ms 0.230 1.77 s 947 ms
2026-09-19 1.94 s 108 ms 0.210 1.80 s 957 ms
2026-09-12 1.96 s 111 ms 0.210 1.84 s 1.02 s
2026-09-05 1.94 s 108 ms 0.210 1.82 s 1.02 s
2026-08-29 1.99 s 108 ms 0.220 1.88 s 1.07 s
2026-08-22 1.98 s 107 ms 0.210 1.87 s 1.07 s
2026-08-15 1.95 s 103 ms 0.210 1.83 s 1.02 s
2026-08-08 1.98 s 107 ms 0.210 1.84 s 1.05 s
2026-08-01 2.00 s 111 ms 0.200 1.86 s 1.05 s
2026-07-25 1.99 s 112 ms 0.180 1.81 s 1.02 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 16, 2026, 3:18 PM UTC 94 2.85 s 0.011 112 ms 213 kB 3/3 ±0 2,458 -1% 47.4s Wayback
Oct 14, 2026, 6:22 AM UTC 94 2.81 s 0.011 139 ms 208 kB 3/3 ±1 2,487 0% 47.3s Wayback
Oct 9, 2026, 10:11 AM UTC 95 2.75 s 0.001 32 ms 207 kB 3/3 ±3 4,228 +70% 41.6s Wayback
Oct 7, 2026, 2:41 AM UTC 95 2.78 s 0.010 71 ms 205 kB 3/3 ±2 2,432 -2% 46.7s Wayback
Oct 4, 2026, 3:49 PM UTC 95 2.76 s 0.010 52 ms 205 kB 3/3 ±0 2,663 +7% 46.1s Wayback
Oct 1, 2026, 12:22 AM UTC 95 2.78 s 0.010 66 ms 203 kB 3/3 ±0 2,492 0% 44.9s Wayback
Sep 28, 2026, 11:59 PM UTC 95 2.78 s 0.010 64 ms 202 kB 3/3 ±0 2,506 +1% 46.7s Wayback
Sep 25, 2026, 4:45 PM UTC 95 2.77 s 0.010 68 ms 203 kB 3/3 ±0 2,468 -1% 45.5s Wayback
Sep 23, 2026, 6:03 AM UTC 95 2.76 s 0.010 62 ms 204 kB 3/3 ±1 2,462 -1% 46.5s Wayback
Sep 21, 2026, 1:34 AM UTC 95 2.78 s 0.010 72 ms 203 kB 3/3 ±3 2,474 -1% 45s Wayback
Sep 18, 2026, 5:32 PM UTC 95 2.78 s 0.010 91 ms 203 kB 3/3 ±0 2,944 +18% 42.6s Wayback
Sep 16, 2026, 9:13 AM UTC 95 2.78 s 0.010 70 ms 200 kB 3/3 ±3 2,509 +1% 45.8s Wayback
Sep 14, 2026, 5:53 AM UTC 95 2.78 s 0.010 47 ms 200 kB 3/3 ±3 3,205 +29% 42.9s Wayback
Sep 11, 2026, 11:24 PM UTC 95 2.78 s 0.010 62 ms 202 kB 3/3 ±0 2,373 -5% 44.9s Wayback
Sep 9, 2026, 8:29 PM UTC 95 2.79 s 0.010 66 ms 201 kB 3/3 ±16 2,283 -8% 25.6s Wayback
Sep 7, 2026, 7:03 PM UTC 95 2.77 s 0.010 61 ms 204 kB 3/3 ±1 2,237 -10% 24.2s Wayback
Sep 5, 2026, 12:46 PM UTC 95 2.77 s 0.010 61 ms 203 kB 3/3 ±0 2,485 0% 24.8s Wayback
Sep 4, 2026, 10:50 AM UTC 95 2.77 s 0.010 64 ms 204 kB 3/3 ±0 2,500 +1% 26.1s Wayback
Sep 3, 2026, 1:08 AM UTC 95 2.76 s 0.010 36 ms 207 kB 3/3 ±1 2,989 +20% 23.2s Wayback
Sep 1, 2026, 11:08 PM UTC 95 2.80 s 0.010 67 ms 206 kB 3/3 ±0 2,657 +7% 25.7s Wayback
Aug 31, 2026, 9:26 PM UTC 95 2.78 s 0.010 67 ms 207 kB 3/3 ±0 2,456 -1% 26.5s Wayback
Aug 26, 2026, 7:03 PM UTC 95 2.77 s 0.010 69 ms 204 kB 3/3 ±23 2,450 -2% 27.3s Wayback
Aug 25, 2026, 4:36 PM UTC 95 2.79 s 0.010 76 ms 206 kB 3/3 ±1 2,491 0% 26.6s Wayback