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 ·

duncan.dev

https://duncan.dev/

Data from Aug 20, 2026, 9:31 PM UTC — 20h old.

Built Awesome · 1 measurement · since Aug 20, 2026 · last attempt 20h

This URL redirects to https://duncandavidson.com/.

Lighthouse follows the redirect, so the numbers below describe the destination page, not this one. Not yet confirmed as a move; it needs to lead to the same place on several consecutive runs first.

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

99
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 1.56 s — — 1.56 s 1.56 s
CLS Cumulative Layout Shift 0.050 — — 0.050 0.050
TBT Total Blocking Time 0 ms — — 0 ms 0 ms
FCP First Contentful Paint 1.56 s — — 1.56 s 1.56 s
Speed Index 1.56 s — — 1.56 s 1.56 s
TTFB Time to First Byte 620 ms — — 620 ms 620 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 66 ms
time to first byte 35 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 108.3 kB — — 108.3 kB 108.3 kB
Requests 8 — — 8 8
Third-party Weight 107.9 kB — — 107.9 kB 107.9 kB
Third-party CPU 1 ms — — 1 ms 1 ms
Unused JS 0 B — — 0 B 0 B
Unused CSS 0 B — — 0 B 0 B

By resource type

font 71.1 kB · 3 req
image 26.7 kB · 1 req
document 4.5 kB · 1 req
stylesheet 4.0 kB · 1 req
other 2.0 kB · 2 req
third party 368 B · 1 req

Third parties 1 entities

107.9 kB transferred, 1 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

duncandavidson.com 107.9 kB · 1 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 214 ms — — 214 ms 214 ms
Long Tasks 0 — — 0 0
DOM Elements 75 — — 75 75
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

style layout 96 ms
other 85 ms
paint composite render 16 ms
script evaluation 10 ms
parse HTML 6 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 172 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 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 20, 2026, 9:31 PM UTC 99 1.56 s 0.050 0 ms 108.3 kB 3/3 ±1 2,351 20.7s

Embed this score

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