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 ·

jamesbateson.co.uk

https://jamesbateson.co.uk/

Data from Aug 21, 2026, 1:16 AM UTC — 16h old.

Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 16h

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.

Netlify Hosted by Netlify

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 791 ms 791 ms 791 ms
CLS Cumulative Layout Shift 0 0 0
TBT Total Blocking Time 0 ms 0 ms 0 ms
FCP First Contentful Paint 791 ms 791 ms 791 ms
Speed Index 791 ms 791 ms 791 ms
TTFB Time to First Byte 603 ms 603 ms 603 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 40 ms
time to first byte 5 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 14.1 kB 14.1 kB 14.1 kB
Requests 3 3 3
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

document 12.1 kB · 1 req
other 2.0 kB · 2 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 147 ms 147 ms 147 ms
Long Tasks 0 0 0
DOM Elements 259 259 259
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 77 ms
style layout 35 ms
parse HTML 13 ms
script evaluation 11 ms
paint composite render 10 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 601 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, 1:16 AM UTC 100 791 ms 0 0 ms 14.1 kB 3/3 ±0 2,492 21.7s

Embed this score

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