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 ·

t12t.se

https://t12t.se/

Data from Aug 21, 2026, 7:47 AM UTC — 10h old.

Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 10h

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.

GitHub Pages Hosted by GitHub Pages

Scores

100
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 902 ms — — 902 ms 902 ms
CLS Cumulative Layout Shift 0 — — 0 0
TBT Total Blocking Time 0 ms — — 0 ms 0 ms
FCP First Contentful Paint 902 ms — — 902 ms 902 ms
Speed Index 902 ms — — 902 ms 902 ms
TTFB Time to First Byte 602 ms — — 602 ms 602 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 34 ms
time to first byte 4 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 24.8 kB — — 24.8 kB 24.8 kB
Requests 6 — — 6 6
Third-party Weight 0 B — — 0 B 0 B
Third-party CPU 0 ms — — 0 ms 0 ms
Unused JS 0 B — — 0 B 0 B
Unused CSS 0 B — — 0 B 0 B

By resource type

font 13.0 kB · 1 req
document 5.5 kB · 1 req
stylesheet 3.5 kB · 1 req
image 492 B · 1 req
other 322 B · 1 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 134 ms — — 134 ms 134 ms
Long Tasks 0 — — 0 0
DOM Elements 139 — — 139 139
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 0 — — 0 0
A11y Failures 0 — — 0 0
A11y Failing Nodes 0 — — 0 0

Main thread work

other 83 ms
style layout 27 ms
paint composite render 10 ms
script evaluation 7 ms
parse HTML 6 ms
script parse compile 0 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 272 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.

Hygiene

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

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

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, 7:47 AM UTC 100 902 ms 0 0 ms 24.8 kB 3/3 ±0 2,974 19.5s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show t12t.se'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://t12t.se/"></speedlify-score>