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

slides.oddbird.net

https://slides.oddbird.net/

100 88 100 100 !AXE –CWV

Ranks Overall #836 Built Awesome #656

Data from Sep 6, 2026, 10:21 AM UTC old Measured once a week · 3 runs since Aug 21, 2026

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

Stack

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Lighthouse Scores

100
Performance
↑ +2 (+2%)
88
Accessibility
no change
100
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 1.82 s good ↓ -135 ms (-6.9%) 1.82 s – 1.95 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 919 ms good ↓ -885 ms (-49.1%) 919 ms – 1.80 s
Speed Index 919 ms good ↓ -885 ms (-49.1%) 919 ms – 1.80 s
TTFB Time to First Byte 619 ms good ↑ +15 ms (+2.5%) 604 ms – 629 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 157 ms
time to first byte 21 ms

Page weight

Metric Value Change / range Trend
Page Weight 237 kB ↓ -218 B (-0.1%) 237 kB – 237 kB
Requests 5 → no change 5 – 5
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 90.8% 196 kB · 1 req
  • stylesheet 5.6% 12.0 kB · 1 req
  • script 2.5% 5.5 kB · 1 req
  • document 1.1% 2.3 kB · 1 req

Page health

Metric Value Change / range Trend
Main Thread Work 231 ms ↓ -13 ms (-5.1%) 153 ms – 244 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 183 → no change 183 – 183
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 3 → no change 3 – 3
A11y Failures 2 → no change 2 – 2
A11y Failing Nodes 3 → no change 3 – 3

Main thread work

style layout 95 ms
other 87 ms
script evaluation 17 ms
parse HTML 16 ms
paint composite render 14 ms
script parse compile 2 ms

Axe violations axe-core 4.13.0, full rule set

3 violating nodes across 2 rules, 375 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • critical aria-valid-attr — ARIA attributes must conform to valid names 2 nodes
  • critical label — Form elements must have labels 1 node

Accessibility failures 2 of 22 audits

  • aria-valid-attr — `[aria-*]` attributes are not valid or misspelled 2 nodes
  • label — Form elements do not have associated labels 1 node

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 6, 2026, 10:21 AM UTC 100 1.82 s 0 0 ms 237 kB 3/3 ±3 2,457 -1% 22.2s Wayback
Aug 30, 2026, 7:56 AM UTC 98 1.95 s 0 0 ms 237 kB 3/3 ±3 2,457 -1% 21.9s Wayback
Aug 21, 2026, 7:45 AM UTC 100 1.83 s 0 0 ms 237 kB 3/3 ±0 4,442 +79% 20.6s Wayback

Embed this score

Use this web component to show slides.oddbird.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://slides.oddbird.net/"></speedlify2-score>