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

sdk.val.town

https://sdk.val.town/

91PERF 91A11Y 100BEST 82SEO ✗AXE –CWV

Ranks Overall #1,418 Astro Showcase #141

Data from Oct 2, 2026, 1:44 PM UTC old Measured once a month · 1 run since Oct 2, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

This URL redirects to https://sdk.val.town/api/typescript.

The site’s front door pointing at the page it serves there — a locale or CMS landing path, not a move. The origin is still the address of the site, so history stays under it rather than forking to a path that depends on where the measurement ran. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

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

Stack

Astro 5.16.6 Built with Astro 5.16.6
Uses ReactReact
Cloudflare Hosted by Cloudflare

Lighthouse Scores LAB Simulated

91
Performance
no change
91
Accessibility
no change
100
Best Practices
no change
82
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 3.34 s needs work — 3.34 s – 3.34 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0 good — 0 – 0
TBT Total Blocking Time 27 ms good — 27 ms – 27 ms
FCP First Contentful Paint 1.91 s needs work — 1.91 s – 1.91 s
Speed Index 1.93 s good — 1.93 s – 1.93 s
TTFB Time to First Byte 636 ms good — 636 ms – 636 ms

LCP Subparts LAB Unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.

time to first byte 490 ms
element render delay 137 ms

Page weight

Metric Value Change / range Trend
Page Weight 767 kB — 767 kB – 767 kB
Requests 60 — 60 – 60
Third-party Weight 6.4 kB — 6.4 kB – 6.4 kB
Third-party CPU 0 ms — 0 ms – 0 ms
Unused JS 164 kB — 164 kB – 164 kB
Unused CSS 0 B — 0 B – 0 B

By resource type

Type Transfer Share Size Requests
script 83.3% 638 kB 45
font 8.9% 67.8 kB 2
stylesheet 3.8% 29.2 kB 2
document 2.5% 19.2 kB 1
image 1.4% 11.0 kB 7
other <0.1% 288 B 1
Total 767 kB 60

Third parties 2 entities

Entity Transfer Size Main thread Simulated
GitHub image 3.9 kB 0 ms
shields.io image 2.5 kB 0 ms
Total 6.4 kB 0 ms

Page health

Metric Value Change / range Trend
Main Thread Work 1.21 s — 1.21 s – 1.21 s
Long Tasks 5 — 5 – 5
DOM Elements 1,426 — 1,426 – 1,426
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 116 — 116 – 116
A11y Failures 2 — 2 – 2
A11y Failing Nodes 116 — 116 – 116

Main thread work

Task Time Share Duration Simulated
other 45% 551 ms
script evaluation 30% 360 ms
style layout 17% 201 ms
paint composite render 3% 38 ms
parse HTML 2% 29 ms
garbage collection 2% 20 ms
script parse compile 1% 14 ms
Total 1.21 s

Axe violations axe-core 4.13.0, full rule set

116 violating nodes across 2 rules, 1902 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 113 nodes
    Offending elements (5 of 113)
    1. pre[data-language="js"]:nth-child(10) > code > .line:nth-child(1) > span:nth-child(1) 
      <span style="color:#D73A49;--shiki-dark:#F97583">import</span>
    2. pre[data-language="js"]:nth-child(10) > code > .line:nth-child(1) > span:nth-child(3) 
      <span style="color:#D73A49;--shiki-dark:#F97583">from</span>
    3. pre[data-language="js"]:nth-child(10) > code > .line:nth-child(3) > span:nth-child(1) 
      <span style="color:#D73A49;--shiki-dark:#F97583">const</span>
    4. pre[data-language="js"]:nth-child(10) > code > .line:nth-child(3) > span:nth-child(4) 
      <span style="color:#D73A49;--shiki-dark:#F97583"> new</span>
    5. pre[data-language="js"]:nth-child(10) > code > .line:nth-child(4) > span:nth-child(4) 
      <span style="color:#6A737D;--shiki-dark:#6A737D">// This is the default and can be omitted</span>
  • critical image-alt — Images must have alternative text 3 nodes
    Offending elements
    1. p:nth-child(75) > img[align="top"][width="18"][height="21"] 
      <img src="https://raw.githubusercontent.com/stainless-api/sdk-assets/refs/heads/main/node.svg" align="top" width="18" height="21">
    2. p:nth-child(77) > img[align="top"][width="18"][height="21"] 
      <img src="https://raw.githubusercontent.com/stainless-api/sdk-assets/refs/heads/main/bun.svg" align="top" width="18" height="21">
    3. p:nth-child(79) > img[align="top"][width="18"][height="21"] 
      <img src="https://raw.githubusercontent.com/stainless-api/sdk-assets/refs/heads/main/deno.svg" align="top" width="18" height="21">

Accessibility failures 2 of 27 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 113 nodes
  • image-alt — Image elements do not have `[alt]` attributes 3 nodes

Best Practices failures 1 of 19 audits

  • valid-source-maps — Missing source maps for large first-party JavaScript 3 items

SEO failures 2 of 8 audits

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

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 2, 2026, 1:44 PM UTC 91 3.34 s 0 27 ms 767 kB 3/3 ±25 2,978 +20% 34s Wayback