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

firebase.studio

https://firebase.studio/

62PERF 96A11Y 77BEST 100SEO !AXE !CWV

Ranks Overall #1,106 Astro Showcase #97

Data from Oct 2, 2026, 6:54 AM 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

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

Stack

Astro 5.5.4 Built with Astro 5.5.4
Uses ReactReactSvelteSvelte

Lighthouse Scores LAB Simulated

62
Performance
no change
96
Accessibility
no change
77
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 (2026-09-02 → 2026-09-29), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 6.64 s poor — 6.64 s – 6.64 s 2.25 s good 79% 11.5% 9.5%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 323 ms needs work 51.8% 36.2% 11.9%
CLS CWV Cumulative Layout Shift 0.113 needs work — 0.113 – 0.113 0 good 92.4% 6.3% 1.4%
TBT Total Blocking Time 289 ms needs work — 289 ms – 289 ms n/a —
FCP First Contentful Paint 3.03 s poor — 3.03 s – 3.03 s 2.09 s needs work 68.5% 18.1% 13.4%
Speed Index 3.03 s good — 3.03 s – 3.03 s n/a —
TTFB Time to First Byte 606 ms good — 606 ms – 606 ms 1.24 s needs work 58.5% 27.6% 13.9%

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.

resource load duration 187 ms
time to first byte 111 ms
element render delay 52 ms
resource load delay 12 ms

LCP LAB Simulated vs LCP FIELD

Lab 6.64 s
Field p75 2.25 s

The lab LCP is 2.94× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 1.49 MB — 1.49 MB – 1.49 MB
Requests 57 — 57 – 57
Third-party Weight 1.35 MB — 1.35 MB – 1.35 MB
Third-party CPU 139 ms — 139 ms – 139 ms
Unused JS 173 kB — 173 kB – 173 kB
Unused CSS 0 B — 0 B – 0 B

By resource type

Type Transfer Share Size Requests
image 57% 852 kB 9
script 29% 433 kB 28
font 9.8% 147 kB 7
document 2.7% 40.6 kB 1
stylesheet 1.1% 16.1 kB 6
other 0.4% 5.6 kB 6
Total 1.49 MB 57

Third parties 6 entities

Entity Transfer Size Main thread Simulated
rstr.in image 852 kB 0 ms
Google Tag Manager script 316 kB 134 ms
Google Fonts font 152 kB 0 ms
Google CDN 29.2 kB 5 ms
Google/Doubleclick Ads 557 B 0 ms
All 6 1.35 MB 139 ms

Page health

Metric Value Change / range Trend
Main Thread Work 2.56 s — 2.56 s – 2.56 s
Long Tasks 5 — 5 – 5
DOM Elements 505 — 505 – 505
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 4 — 4 – 4
A11y Failures 1 — 1 – 1
A11y Failing Nodes 4 — 4 – 4

Main thread work

Task Time Share Duration Simulated
script evaluation 32% 825 ms
style layout 27% 690 ms
other 26% 667 ms
paint composite render 9% 232 ms
script parse compile 4% 104 ms
parse HTML 1% 37 ms
garbage collection 0% 9 ms
Total 2.56 s

Axe violations axe-core 4.13.0, full rule set

4 violating nodes across 1 rule, 644 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 4 nodes
    Offending elements
    1. .md\:py-48.py-24.container:nth-child(5) > .max-w-4xl.gap-10.sm\:items-center > .w-fit.text-gray-900.bg-gray-200 
      <span class="text-gray-900 bg-gray-200 px-5 py-2.5 rounded-full font-mono-fancy uppercase text-xs opacity-60 mb-4 w-fit">Collaboration</span>
    2. .md\:py-48.py-24.container:nth-child(5) > .max-w-4xl.gap-10.sm\:items-center > .leading-\[1\.45\].text-gray-600.max-w-md 
      <p class="text-gray-600 leading-[1.45] max-w-md">Provide a URL for your early testers to preview your app and give feedback. Share workspaces with other team members to contribute to the same project…
    3. .lg\:order-2 > .text-gray-900.bg-gray-200.px-5 
      <span class="text-gray-900 bg-gray-200 px-5 py-2.5 rounded-full font-mono-fancy uppercase text-xs opacity-60 mb-4 svelte-k1gdal">End-to-end testing</span>
    4. .lg\:order-2 > .rich-text.text-gray-600.max-w-md 
      <p class="text-gray-600 rich-text max-w-md svelte-k1gdal">

Accessibility failures 1 of 23 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 4 nodes

Best Practices failures 2 of 19 audits

  • third-party-cookies — Uses third-party cookies 1 item
  • inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 1 item

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 2.25 s 322 ms 0 2.09 s 1.23 s
2026-09-19 2.25 s 323 ms 0 2.09 s 1.22 s
2026-09-12 2.25 s 330 ms 0 2.11 s 1.23 s
2026-09-05 2.26 s 333 ms 0 2.11 s 1.22 s
2026-08-29 2.22 s 334 ms 0 2.08 s 1.18 s
2026-08-22 2.17 s 335 ms 0 2.03 s 1.14 s
2026-08-15 2.13 s 333 ms 0 2.00 s 1.11 s
2026-08-08 2.11 s 333 ms 0 1.98 s 1.09 s
2026-08-01 2.12 s 336 ms 0 1.99 s 1.12 s
2026-07-25 2.12 s 337 ms 0.010 2.00 s 1.12 s
2026-07-18 2.13 s 340 ms 0 2.00 s 1.12 s
2026-07-11 2.17 s 342 ms 0 2.03 s 1.11 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 2, 2026, 6:54 AM UTC 62 6.64 s 0.113 289 ms 1.49 MB 3/3 ±4 2,343 -6% 27.2s Wayback