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

designftw.mit.edu

https://designftw.mit.edu/

99 100 100 80 ✓AXE –CWV

Ranks Overall #463 Built Awesome #379

Data from Sep 7, 2026, 9:01 AM UTC old Measured once a week · 4 runs since Aug 20, 2026

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

Stack

Netlify Hosted by Netlify

Lighthouse Scores

99
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
80
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 1.66 s good ↓ -45 ms (-2.6%) 1.66 s – 1.70 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 1.59 s good ↓ -41 ms (-2.5%) 1.59 s – 1.63 s
Speed Index 1.59 s good ↓ -41 ms (-2.5%) 1.59 s – 1.63 s
TTFB Time to First Byte 603 ms good ↓ -23 ms (-3.7%) 603 ms – 626 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 106 ms
time to first byte 5 ms

Page weight

Metric Value Change / range Trend
Page Weight 21.5 kB → no change 21.5 kB – 21.8 kB
Requests 21 → no change 21 – 21
Third-party Weight 11.6 kB ↓ -29 B (-0.2%) 11.6 kB – 11.7 kB
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

  • script 49.4% 10.6 kB · 15 req
  • stylesheet 29.3% 6.3 kB · 3 req
  • document 18.3% 3.9 kB · 1 req
  • other 3.1% 660 B · 1 req

Third parties 3 entities

11.6 kB transferred, 0 ms on the main thread.

blissfuljs.com script 7.1 kB · 0 ms CPU
Google Fonts stylesheet 2.3 kB · 0 ms CPU
verou.me script 2.2 kB · 0 ms CPU

Page health

Metric Value Change / range Trend
Main Thread Work 212 ms ↑ +11 ms (+5.4%) 201 ms – 267 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 144 → no change 144 – 144
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 0
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

other 113 ms
style layout 60 ms
script evaluation 16 ms
paint composite render 12 ms
parse HTML 9 ms
script parse compile 2 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 292 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 Archive
Sep 7, 2026, 9:01 AM UTC 99 1.66 s 0 0 ms 21.5 kB 3/3 ±3 2,493 0% 23.3s Wayback
Aug 31, 2026, 3:55 AM UTC 99 1.70 s 0 0 ms 21.5 kB 3/3 ±1 3,021 +22% 22.8s Wayback
Aug 21, 2026, 2:39 PM UTC 99 1.66 s 0 0 ms 21.8 kB 3/3 ±0 2,473 0% 22.6s Wayback
Aug 20, 2026, 7:42 PM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 19.2s

Embed this score

Use this web component to show designftw.mit.edu'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://designftw.mit.edu/"></speedlify2-score>