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

atom-editor.cc

https://atom-editor.cc/

99 90 100 83 ✗AXE ✓CWV

Ranks Overall #1,232 Built Awesome #946

Data from Sep 10, 2026, 9:32 PM UTC old Measured once a week · 4 runs since Aug 20, 2026

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

Stack

Eleventy Built with Eleventy
Cloudflare Hosted by Cloudflare

Lighthouse Scores

99
Performance
no change
90
Accessibility
no change
100
Best Practices
no change
83
SEO
no change

Metrics Lighthouse, mobile Chrome UX Report

Core Web Vitals: passing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-08-12 → 2026-09-08), url-level.

Metric Lab Lighthouse Field Chrome UX Report
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 1.83 s good ↓ -185 ms (-9.2%) 1.83 s – 2.02 s 1.70 s good 89.7% 6.5% 3.7%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 87 ms good 94.2% 4.7% 1.1%
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0 0 good 95.1% 0.4% 4.5%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 1.58 s good ↑ +46 ms (+3%) 1.53 s – 1.58 s 1.33 s good 85% 10.3% 4.7%
Speed Index 1.58 s good ↑ +46 ms (+3%) 1.53 s – 1.58 s n/a —
TTFB Time to First Byte 496 ms good ↑ +27 ms (+5.8%) 469 ms – 625 ms 845 ms needs work 72.8% 19.9% 7.4%

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.

time to first byte 45 ms
resource load delay 44 ms
resource load duration 39 ms
element render delay 34 ms

Lab LCP vs Field LCP Chrome UX Report

Lab 1.83 s
Field p75 1.70 s

The lab LCP is 1.08× the field p75 — real users likely have similar hardware or network connectivity to the lab test.

Page weight

Metric Value Change / range Trend
Page Weight 277 kB ↑ +713 B (+0.3%) 276 kB – 278 kB
Requests 24 → no change 24 – 24
Third-party Weight 10.2 kB ↑ +616 B (+6.4%) 9.6 kB – 11.5 kB
Third-party CPU 5 ms ↑ +1 ms (+37.1%) 3 ms – 5 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 0 B → no change 0 B – 0 B

By resource type

  • image 87.9% 239 kB · 18 req
  • font 6.7% 18.1 kB · 1 req
  • script 3.8% 10.2 kB · 1 req
  • document 1.5% 4.1 kB · 1 req
  • other 0.2% 489 B · 1 req

Third parties 1 entities

10.2 kB transferred, 5 ms on the main thread.

Cloudflare script 10.2 kB · 5 ms CPU

Page health

Metric Value Change / range Trend
Main Thread Work 408 ms ↑ +40 ms (+10.7%) 369 ms – 462 ms
Long Tasks 0 ↓ -1 (-100%) 0 – 1
DOM Elements 180 → no change 180 – 180
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 13 → no change 13 – 15
A11y Failures 3 → no change 3 – 3
A11y Failing Nodes 5 → no change 5 – 5

Main thread work

other 228 ms
style layout 90 ms
script evaluation 47 ms
paint composite render 31 ms
parse HTML 12 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

13 violating nodes across 4 rules, 321 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • moderate region — All page content should be contained by landmarks 8 nodes
  • critical image-alt — Images must have alternative text 3 nodes
  • moderate heading-order — Heading levels should only increase by one 1 node
  • moderate landmark-one-main — Document should have one main landmark 1 node

Accessibility failures 3 of 23 audits

  • image-alt — Image elements do not have `[alt]` attributes 3 nodes
  • heading-order — Heading elements are not in a sequentially-descending order 1 node
  • landmark-one-main — Document does not have a main landmark. 1 node

SEO failures 2 of 9 audits

  • link-text — Links do not have descriptive text 2 items
  • image-alt — Image elements do not have `[alt]` attributes 3 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending LCPINPCLSFCPTTFB
2026-09-05 1.73 s 88 ms 0 1.35 s 875 ms
2026-08-29 1.81 s 93 ms 0 1.48 s 964 ms
2026-08-22 1.81 s 93 ms 0 1.48 s 995 ms
2026-08-15 1.81 s 91 ms 0 1.50 s 978 ms
2026-08-08 1.81 s 93 ms 0 1.50 s 960 ms
2026-08-01 1.75 s 99 ms 0 1.43 s 941 ms
2026-07-25 1.80 s 99 ms 0 1.48 s 942 ms
2026-07-18 1.84 s 102 ms 0 1.48 s 971 ms
2026-07-11 1.85 s 105 ms 0 1.50 s 945 ms
2026-07-04 1.92 s 97 ms 0 1.54 s 945 ms
2026-06-27 1.86 s 94 ms 0 1.52 s 870 ms
2026-06-20 1.76 s 94 ms 0 1.43 s 791 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 10, 2026, 9:32 PM UTC 99 1.83 s 0 0 ms 277 kB 3/3 ±1 3,232 +30% 22.1s Wayback
Sep 3, 2026, 7:22 PM UTC 99 2.02 s 0 0 ms 276 kB 3/3 ±0 3,042 +23% 21.4s Wayback
Aug 27, 2026, 7:06 PM UTC 99 1.88 s 0 0 ms 278 kB 3/3 ±1 2,373 -4% 22.7s Wayback
Aug 20, 2026, 4:30 PM UTC 99 1.92 s 0 0 ms 278 kB 3/3 ±0 2,452 -1% 22.8s Wayback

Embed this score

Use this web component to show atom-editor.cc'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://atom-editor.cc/"></speedlify2-score>