speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time. Follow us on Mastodon or Bluesky.

Charts Compare Measurement runs Embed a score Open to Work

nejsconf.com

https://nejsconf.com/

100PERF 100A11Y 92BEST 91SEO ✓AXE –CWV

Ranks Overall #449 Built Awesome #346 zachleat #16

Data from Oct 7, 2026, 10:46 PM UTC old Measured once a week · 8 runs since Aug 21, 2026

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

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Eleventy 3.1.6 Built with Eleventy 3.1.6
Netlify Hosted by Netlify

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.19 s. Compare this filmstrip against another site.

  1. 398 ms
  2. 796 ms
  3. 1.19 s
  4. 1.59 s
  5. 1.99 s
  6. 2.39 s
  7. 2.79 s
  8. 3.19 s

Lighthouse Scores LAB Simulated

100
Performance
no change
100
Accessibility
no change
92
Best Practices
↓ -4 (-4.2%)
91
SEO
no change

Metrics LAB

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 Simulated
Value Change / range Trend
LCP CWV (estimate) Largest Contentful Paint 994 ms good ↓ -547 ms (-35.5%) significant 820 ms – 1.54 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.005 good → no change 0.005 – 0.005
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 994 ms good ↑ +178 ms (+21.8%) significant 782 ms – 994 ms
Speed Index 1.71 s good ↑ +895 ms (+109.7%) significant 782 ms – 1.71 s
TTFB Time to First Byte 757 ms good ↑ +121 ms (+19%) significant 606 ms – 757 ms

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

element render delay 629 ms
time to first byte 592 ms

Page weight

Metric Value Change / range Trend
Page Weight 238 kB ↑ +1.5 kB (+0.6%) 236 kB – 238 kB
Requests 57 ↑ +1 (+1.8%) 56 – 57
Third-party Weight 84.6 kB ↑ +15 B 84.6 kB – 84.6 kB
Third-party CPU 1 ms ↓ -1 ms (-42.9%) significant 1 ms – 2 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
image 63% 149 kB 49
font 32.7% 77.5 kB 3
script 2.9% 7.0 kB 1
document 0.8% 1.9 kB 1
stylesheet 0.5% 1.1 kB 2
Total 238 kB 57

Third parties 1 entities

Entity Transfer Size Main thread Simulated
Adobe TypeKit font 84.6 kB 1 ms
Total 84.6 kB 1 ms

Without JavaScript

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

Scripts disabled
As rendered

16.6% of pixels differ — parts of the page change. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric Value Change / range Trend
Main Thread Work 343 ms ↓ -20 ms (-5.6%) 318 ms – 377 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 122 → no change 121 – 122
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 8
A11y Failures 0 → no change 0 – 1
A11y Failing Nodes 0 → no change 0 – 1

Main thread work

Task Time Share Duration Simulated
other 58% 200 ms
script evaluation 16% 54 ms
style layout 12% 40 ms
paint composite render 10% 36 ms
parse HTML 3% 10 ms
script parse compile 1% 3 ms
Total 343 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 348 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Best Practices failures 2 of 19 audits

  • image-size-responsive — Serves images with low resolution 27 items
  • errors-in-console — Browser errors were logged to the console 1 item

SEO failures 1 of 8 audits

  • meta-description — Document does not have a meta description

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
Oct 7, 2026, 10:46 PM UTC 100 994 ms 0.005 0 ms 238 kB 3/3 ±0 3,189 +28% 44.5s Wayback
Sep 30, 2026, 8:33 PM UTC 100 1.54 s 0.005 0 ms 236 kB 3/3 ±5 2,483 0% 47.8s Wayback
Sep 23, 2026, 7:27 PM UTC 100 1.53 s 0.005 0 ms 236 kB 3/3 ±8 2,478 0% 48s Wayback
Sep 16, 2026, 6:39 PM UTC 100 820 ms 0.005 0 ms 236 kB 3/3 ±0 2,329 -6% 46.1s Wayback
Sep 9, 2026, 5:35 PM UTC 100 1.52 s 0.005 0 ms 236 kB 3/3 ±0 2,352 -5% 26.7s Wayback
Sep 2, 2026, 3:48 PM UTC 100 1.51 s 0.005 0 ms 236 kB 3/3 ±4 2,345 -6% 29.4s Wayback
Aug 29, 2026, 10:25 PM UTC 100 1.53 s 0.005 0 ms 237 kB 3/3 ±0 2,479 0% 22.2s Wayback
Aug 21, 2026, 5:38 AM UTC 100 1.51 s 0.005 0 ms 237 kB 3/3 ±7 2,454 -1% 23.8s Wayback

Embed this score

Use this web component to show nejsconf.com'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://nejsconf.com/"></speedlify2-score>