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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.

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progression.co

https://progression.co/

41PERF 65A11Y 77BEST 82SEO AXE CWV

Ranks Overall #1,547 Built Awesome #1,124

Data from Sep 20, 2026, 5:58 PM UTC old Measured once a week · 6 runs since Aug 21, 2026

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

Moved from https://progressionapp.com/.

History from the previous URL is included below, with the move on Sep 6, 2026. A step-change around that point is likely the change of address rather than a regression.

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

Stack

Uses PreactPreactAlpine.js 3.17.3Alpine.js 3.17.3
Netlify Hosted by Netlify

Lighthouse Scores LAB Simulated

41
Performance
no change
65
Accessibility
no change
77
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 10.29 s poor ↓ -900 ms (-8%) 10.19 s – 38.00 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a
CLS CWV (estimate) Cumulative Layout Shift 0.029 good → no change 0.029 – 0.123
TBT Total Blocking Time 1.01 s poor ↑ +54 ms (+5.6%) 309 ms – 1.14 s
FCP First Contentful Paint 4.81 s poor ↑ +3 ms (+0.1%) 4.80 s – 12.49 s
Speed Index 4.82 s needs work ↓ -426 ms (-8.1%) 4.82 s – 12.49 s
TTFB Time to First Byte 610 ms good ↑ +3 ms (+0.5%) 605 ms – 626 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.

element render delay 309 ms
resource load duration 36 ms
time to first byte 13 ms
resource load delay 11 ms

Page weight

Metric Value Change / range Trend
Page Weight 7.97 MB ↑ +1.2 kB 7.90 MB – 8.04 MB
Requests 147 → no change 145 – 149
Third-party Weight 1.11 MB ↑ +1.6 kB (+0.1%) 1.11 MB – 6.64 MB
Third-party CPU 615 ms ↑ +35 ms (+6%) 425 ms – 629 ms
Unused JS 652 kB ↑ +495 B (+0.1%) 645 kB – 652 kB
Unused CSS 12.9 kB ↓ -31 B (-0.2%) 12.9 kB – 13.0 kB

By resource type

Type Transfer Share Size Requests
image 62.4% 4.97 MB 61
script 27.4% 2.18 MB 52
font 7.9% 628 kB 7
stylesheet 1.3% 99.7 kB 6
document 0.6% 46.0 kB 3
other 0.5% 37.9 kB 17
media 0.1% 5.1 kB 1
Total 7.97 MB 147

Third parties 17 entities

Entity Transfer Size Main thread Simulated
Google Tag Manager script 320 kB 135 ms
Hubspot script 312 kB 255 ms
Facebook script 116 kB 73 ms
Google Optimize script 115 kB 20 ms
Cloudflare CDN script 110 kB 18 ms
All 17 1.11 MB 615 ms

Page health

Metric Value Change / range Trend
Main Thread Work 4.80 s ↓ -62 ms (-1.3%) 3.26 s – 4.86 s
Long Tasks 20 → no change 16 – 20
DOM Elements 821 ↑ +1 (+0.1%) 820 – 822
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 81 → no change 81 – 82
A11y Failures 10 → no change 10 – 10
A11y Failing Nodes 67 → no change 67 – 67

Main thread work

Task Time Share Duration Simulated
script evaluation 54% 2.59 s
other 19% 896 ms
script parse compile 13% 628 ms
style layout 9% 440 ms
parse HTML 2% 94 ms
paint composite render 2% 89 ms
garbage collection 1% 56 ms
Total 4.80 s

Axe violations axe-core 4.13.0, full rule set

81 violating nodes across 10 rules, 939 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 47 nodes
  • moderate region — All page content should be contained by landmarks 15 nodes
  • critical aria-roles — ARIA roles used must conform to valid values 5 nodes
  • critical aria-required-parent — Certain ARIA roles must be contained by particular parents 4 nodes
  • serious listitem — <li> elements must be contained in a <ul> or <ol> 4 nodes
  • moderate heading-order — Heading levels should only increase by one 2 nodes
  • serious aria-dialog-name — ARIA dialog and alertdialog nodes should have an accessible name 1 node
  • critical aria-required-children — Certain ARIA roles must contain particular children 1 node
  • critical image-alt — Images must have alternative text 1 node
  • serious link-name — Links must have discernible text 1 node

Accessibility failures 10 of 31 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 47 nodes
  • aria-roles — `[role]` values are not valid 5 nodes
  • aria-required-parent — `[role]`s are not contained by their required parent element 4 nodes
  • listitem — List items (`<li>`) are not contained within `<ul>`, `<ol>` or `<menu>` parent elements. 4 nodes
  • heading-order — Heading elements are not in a sequentially-descending order 2 nodes
  • aria-dialog-name — Elements with `role="dialog"` or `role="alertdialog"` do not have accessible names. 1 node
  • aria-required-children — Elements with an ARIA `[role]` that require children to contain a specific `[role]` are missing some or all of those required children. 1 node
  • image-alt — Image elements do not have `[alt]` attributes 1 node
  • link-name — Links do not have a discernible name 1 node
  • target-size — Touch targets do not have sufficient size or spacing. 1 node

Best Practices failures 2 of 20 audits

  • third-party-cookies — Uses third-party cookies 17 items
  • inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 1 item

SEO failures 2 of 8 audits

  • link-text — Links do not have descriptive text 1 item
  • image-alt — Image elements do not have `[alt]` attributes 1 item

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
Sep 20, 2026, 5:58 PM UTC 41 10.29 s 0.029 1.01 s 7.97 MB 3/3 ±13 2,463 -1% 49.6s Wayback
Sep 13, 2026, 5:17 PM UTC 41 11.19 s 0.029 958 ms 7.97 MB 3/3 ±12 2,495 0% 45.7s Wayback
Sep 6, 2026, 1:56 PM UTC 38 10.19 s 0.029 1.14 s 8.03 MB 3/3 ±14 2,480 0% 46.5s Wayback
Sep 6, 2026, 5:39 AM UTC old URL 48 38.00 s 0.072 309 ms 8.04 MB 3/3 ±4 2,890 +16% 39.3s Wayback
Aug 30, 2026, 1:12 AM UTC old URL 43 12.33 s 0.123 550 ms 8.00 MB 3/3 ±9 3,166 +27% 40.4s Wayback
Aug 21, 2026, 2:39 PM UTC old URL 40 10.94 s 0.029 930 ms 7.90 MB 3/3 ±1 2,495 0% 42.6s Wayback

Embed this score

Use this web component to show progression.co's scores on any website, updated whenever this instance re-measures. Don’t forget to bundle the speedlify2-score.js component code into your site!

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://progression.co/"></speedlify2-score>