speedlify2

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

Charts Compare Measurement runs Embed a score

blog.jonathanlau.io

https://blog.jonathanlau.io/

99 92 96 100 !AXE –CWV

Ranks Overall #781 Built Awesome #619

Data from Sep 4, 2026, 5:36 AM UTC old Measured once a week · 3 runs since Aug 20, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Scoring Calculator · Wayback Machine

Stack

Eleventy Built with Eleventy
Netlify Hosted by Netlify

Lighthouse Scores

99
Performance
↓ -1 (-1%)
92
Accessibility
no change
96
Best Practices
no change
100
SEO
no change

Metrics Lighthouse, mobile

No field data: the Chrome UX Report is not being collected for this project, so every figure below is from the Lighthouse run.

Metric Lab Lighthouse
Value Change / range Trend
LCP CWV (estimate) Largest Contentful Paint 2.02 s good ↑ +770 ms (+61.5%) significant 1.04 s – 2.02 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0 good → no change 0 – 0
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 847 ms good ↑ +2 ms (+0.2%) 845 ms – 1.04 s
Speed Index 847 ms good ↑ +2 ms (+0.2%) 845 ms – 1.04 s
TTFB Time to First Byte 648 ms good ↓ -4 ms (-0.6%) 648 ms – 826 ms

LCP Subparts lab observed, unthrottled

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

element render delay 122 ms
time to first byte 27 ms

Page weight

Metric Value Change / range Trend
Page Weight 76.0 kB ↑ +241 B (+0.3%) 75.8 kB – 76.3 kB
Requests 10 → no change 10 – 10
Third-party Weight 0 B → no change 0 B – 0 B
Third-party CPU 0 ms → no change 0 ms – 0 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 0 B → no change 0 B – 0 B

By resource type

  • font 78.8% 59.9 kB · 2 req
  • document 10.4% 7.9 kB · 1 req
  • other 4% 3.0 kB · 2 req
  • image 3.8% 2.9 kB · 3 req
  • script 3% 2.3 kB · 2 req

Page health

Metric Value Change / range Trend
Main Thread Work 249 ms ↑ +19 ms (+8.3%) 230 ms – 299 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 137 → no change 137 – 137
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 1 → no change 1 – 1
A11y Failures 1 → no change 1 – 1
A11y Failing Nodes 2 → no change 2 – 2

Main thread work

other 106 ms
style layout 82 ms
script evaluation 34 ms
paint composite render 13 ms
parse HTML 13 ms
script parse compile 2 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 270 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • minor image-redundant-alt — Alternative text of images should not be repeated as text 1 node

Accessibility failures 1 of 14 audits

  • target-size — Touch targets do not have sufficient size or spacing. 2 nodes

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 1 console error

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 4, 2026, 5:36 AM UTC 99 2.02 s 0 0 ms 76.0 kB 3/3 ±9 2,836 +14% 22.5s Wayback
Aug 28, 2026, 1:16 AM UTC 100 1.25 s 0 0 ms 75.8 kB 3/3 ±14 2,447 -1% 22.9s Wayback
Aug 20, 2026, 3:52 PM UTC 100 1.04 s 0 0 ms 76.3 kB 3/3 ±1 2,344 -6% 21.8s Wayback

Embed this score

Use this web component to show blog.jonathanlau.io'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://blog.jonathanlau.io/"></speedlify2-score>