speedlify2

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

Charts Measurement runs Embed a score

johnbiggins.net

https://www.johnbiggins.net/

100 100 100 100 ✓AXE –CWV

Ranks Overall #183 Built Awesome #151

Data from Sep 6, 2026, 11:35 PM UTC old Measured once a week · 3 runs since Aug 21, 2026

Test elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis

Stack

Eleventy 1.0.2 Built with Eleventy 1.0.2
Netlify Hosted by Netlify

Lighthouse Scores

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

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 3.00 s.

  1. 375 ms
  2. 750 ms
  3. 1.13 s
  4. 1.50 s
  5. 1.88 s
  6. 2.25 s
  7. 2.63 s
  8. 3.00 s

Without JavaScript

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

Scripts disabled
As rendered

0.5% of pixels differ — they are nearly identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 813 ms 794 ms ↑ +19 ms (+2.4%) 794 ms 813 ms
CLS Cumulative Layout Shift 0 0 → no change 0 0
TBT Total Blocking Time 0 ms 0 ms → no change 0 ms 0 ms
FCP First Contentful Paint 813 ms 794 ms ↑ +19 ms (+2.4%) 794 ms 813 ms
Speed Index 813 ms 794 ms ↑ +19 ms (+2.4%) 794 ms 813 ms
TTFB Time to First Byte 619 ms 603 ms ↑ +16 ms (+2.7%) 603 ms 619 ms

LCP Subparts lab observed, unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab metrics LCP metric shown above is throttled.

element render delay 39 ms
time to first byte 20 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 4.6 kB 4.6 kB ↓ -29 B (-0.6%) 4.6 kB 4.6 kB
Requests 3 3 → no change 3 3
Third-party Weight 0 B 0 B → no change 0 B 0 B
Third-party CPU 0 ms 0 ms → no change 0 ms 0 ms
Unused JS 0 B 0 B → no change 0 B 0 B
Unused CSS 0 B 0 B → no change 0 B 0 B

By resource type

  • document 100% 3.1 kB · 1 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 137 ms 153 ms ↓ -17 ms (-11%) 137 ms 153 ms
Long Tasks 0 0 → no change 0 0
DOM Elements 48 48 → no change 48 48
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 0 → no change 0 0
A11y Failures 0 0 → no change 0 0
A11y Failing Nodes 0 0 → no change 0 0

Main thread work

style layout 58 ms
other 57 ms
script evaluation 10 ms
parse HTML 6 ms
paint composite render 5 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 123 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

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
Sep 6, 2026, 11:35 PM UTC 100 813 ms 0 0 ms 4.6 kB 3/3 ±0 2,480 0% 20.4s
Aug 30, 2026, 11:14 PM UTC 100 794 ms 0 0 ms 4.6 kB 3/3 ±0 2,468 0% 20.4s
Aug 21, 2026, 6:40 PM UTC 100 801 ms 0 0 ms 4.6 kB 3/3 ±0 2,323 -6% 20.3s

Embed this score

Use this web component to show johnbiggins.net'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://www.johnbiggins.net/"></speedlify2-score>