speedlify2

Lighthouse lab metrics and Chrome UX Report field data for a list of sites, recorded on every run and compared over time.

Measurement runs · Embed a score · Field data from the Chrome UX Report ·

tracker.greenweb.org

https://tracker.greenweb.org/

97 93 100 92 –CWV 5AXE

Data from Aug 21, 2026, 9:41 AM UTC — 9h old.

Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 9h

Stack

Detected on the same page load as the accessibility pass — the generator from <meta name="generator"> or the shape of the page, the host from response headers.

Cloudflare Hosted by Cloudflare

Scores

97
Performance
no change
93
Accessibility
no change
100
Best Practices
no change
92
SEO
no change

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 2.45 s — — 2.45 s 2.45 s
CLS Cumulative Layout Shift 0 — — 0 0
TBT Total Blocking Time 0 ms — — 0 ms 0 ms
FCP First Contentful Paint 1.52 s — — 1.52 s 1.52 s
Speed Index 1.52 s — — 1.52 s 1.52 s
TTFB Time to First Byte 464 ms — — 464 ms 464 ms

What LCP is made of

A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.

element render delay 57 ms
time to first byte 23 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 25.3 kB — — 25.3 kB 25.3 kB
Requests 10 — — 10 10
Third-party Weight 15.2 kB — — 15.2 kB 15.2 kB
Third-party CPU 6 ms — — 6 ms 6 ms
Unused JS 0 B — — 0 B 0 B
Unused CSS 0 B — — 0 B 0 B

By resource type

script 13.4 kB · 2 req
stylesheet 3.3 kB · 1 req
document 3.3 kB · 1 req
image 2.9 kB · 1 req
other 2.2 kB · 5 req
third party 15.2 kB · 6 req

Third parties 3 entities

15.2 kB transferred, 6 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

Cloudflare 11.5 kB · 4 ms CPU
Cabin 2.1 kB · 3 ms CPU
thegreenwebfoundation.org 1.6 kB · 0 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 185 ms — — 185 ms 185 ms
Long Tasks 0 — — 0 0
DOM Elements 133 — — 133 133
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 5 — — 5 5
A11y Failures 1 — — 1 1
A11y Failing Nodes 3 — — 3 3

Main thread work

other 85 ms
script evaluation 45 ms
style layout 37 ms
paint composite render 10 ms
parse HTML 7 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

5 violating nodes across 3 rules, 211 passing. This is a standalone axe run, stricter than the subset Lighthouse folds into its score above — and it is the second tiebreaker in the ranking.

  • serious color-contrast — Elements must meet minimum color contrast ratio thresholds 3 nodes
  • moderate landmark-unique — Landmarks should have a unique role or role/label/title (i.e. accessible name) combination 1 node
  • moderate region — All page content should be contained by landmarks 1 node

Accessibility failures 1 of 15 audits

Tracked as a count, not just the score — the weighted score is coarse enough that you can ship a broken component and barely move it.

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 3 nodes

Hygiene

Changes rarely — which is exactly why a change is worth noticing.

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Every stored run for this URL, newest first. Failures are kept as records — "this site was down on Tuesday" is data too.

When PerfLCPCLSTBTWeight RunsSpreadBenchTook
Aug 21, 2026, 9:41 AM UTC 97 2.45 s 0 0 ms 25.3 kB 3/3 ±15 2,500 21.1s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show tracker.greenweb.org's scores, updated whenever this instance re-measures — more about the component. Don’t forget to bundle the speedlify-score.js component code into your site! 

<speedlify-score speedlify-url="https://zachleat.github.io/speedlify2/" url="https://tracker.greenweb.org/"></speedlify-score>