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

zachleat.com/web/speedlify

https://www.zachleat.com/web/speedlify

99PERF 100A11Y 100BEST 100SEO ✓AXE ✓CWV

Ranks Overall #238 zachleat #5

Data from Oct 6, 2026, 12:49 PM UTC old Measured once a week · 10 runs since Aug 21, 2026

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

This URL redirects to https://www.zachleat.com/web/speedlify/.

The same URL in a different form — a trailing slash — so both are treated as one site rather than two: one history, measured once. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

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

Stack

Build Awesome 4.0.0 Built with Build Awesome 4.0.0
Uses Font AwesomeFont Awesome
Netlify Hosted by Netlify

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.00 s. Compare this filmstrip against another site.

  1. 375 ms
  2. 750 ms
  3. 1.13 s
  4. 1.50 s
  5. 1.88 s
  6. 2.25 s
  7. 2.63 s
  8. 3.00 s

Lighthouse Scores LAB Simulated

99
Performance
no change
100
Accessibility
↑ +4 (+4.2%)
100
Best Practices
no change
100
SEO
no change

Metrics LAB FIELD

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 (2026-09-07 → 2026-10-04), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 2.10 s good ↑ +202 ms (+10.6%) 1.68 s – 2.21 s 1.05 s good 96.9% 2.2% 0.8%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 87 ms good 95% 5% 0%
CLS CWV Cumulative Layout Shift 0.001 good → no change 0.001 – 0.092 0 good 99.1% 0.9% 0%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 1.35 s good ↑ +189 ms (+16.2%) significant 995 ms – 1.87 s 996 ms good 93.7% 4.7% 1.7%
Speed Index 1.35 s good ↑ +189 ms (+16.2%) significant 995 ms – 1.87 s n/a —
TTFB Time to First Byte 604 ms good ↓ -19 ms (-3%) 604 ms – 634 ms 637 ms good 80.8% 15.5% 3.7%

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.

time to first byte 1.14 s
element render delay 390 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.10 s
Field p75 1.05 s

The lab LCP is 2.01× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 177 kB ↑ +240 B (+0.1%) 174 kB – 217 kB
Requests 21 → no change 21 – 25
Third-party Weight 5.5 kB ↑ +22 B (+0.4%) 5.4 kB – 21.6 kB
Third-party CPU 2 ms ↑ +0 ms (+28.6%) 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
document 35.9% 63.6 kB 1
font 31.6% 55.9 kB 4
image 18.2% 32.2 kB 6
script 8.6% 15.3 kB 6
stylesheet 3.3% 5.8 kB 1
other 2.4% 4.2 kB 3
Total 177 kB 21

Third parties 3 entities

Entity Transfer Size Main thread Simulated
zgo.at script 4.4 kB 2 ms
11ty.dev image 721 B 0 ms
goatcounter.com 382 B 0 ms
Total 5.5 kB 2 ms

Without JavaScript

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

Scripts disabled
As rendered

0.9% of pixels differ — they are nearly identical. 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 738 ms ↑ +187 ms (+33.9%) significant 426 ms – 738 ms
Long Tasks 3 ↑ +2 (+200%) significant 1 – 3
DOM Elements 2,042 ↑ +39 (+1.9%) 479 – 2,042
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 ↓ -3 (-100%) significant 0 – 3
A11y Failures 0 ↓ -1 (-100%) 0 – 1
A11y Failing Nodes 0 ↓ -3 (-100%) significant 0 – 3

Main thread work

Task Time Share Duration Simulated
style layout 35% 255 ms
other 34% 253 ms
script evaluation 13% 95 ms
parse HTML 10% 70 ms
paint composite render 8% 60 ms
script parse compile 1% 4 ms
Total 738 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 3354 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

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-26 1.09 s 88 ms 0 1.08 s 702 ms
2026-09-19 1.20 s — 0 1.08 s 829 ms
2026-09-12 1.36 s — 0 1.17 s 883 ms
2026-09-05 1.27 s — 0 1.11 s 831 ms
2026-08-29 1.19 s — 0 1.05 s 747 ms
2026-08-22 1.11 s — 0 1.04 s 693 ms
2026-08-15 1.08 s — 0 1.01 s 693 ms
2026-08-08 1.15 s — 0 1.08 s 703 ms
2026-08-01 1.09 s — 0 1.04 s 693 ms
2026-05-23 → 2026-07-25 No data — 10 weeks under the CrUX reporting threshold
2026-05-16 846 ms — 0 741 ms 557 ms
2026-04-11 → 2026-05-09 No data — 5 weeks under the CrUX reporting threshold

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 6, 2026, 12:49 PM UTC 99 2.10 s 0.001 0 ms 177 kB 3/3 ±0 2,497 0% 70.6s Wayback
Sep 29, 2026, 4:53 AM UTC 99 1.90 s 0.001 0 ms 177 kB 3/3 ±0 3,008 +21% 68.5s Wayback
Sep 22, 2026, 3:30 AM UTC 100 1.68 s 0.001 0 ms 189 kB 3/3 ±0 2,938 +18% 42.5s Wayback
Sep 14, 2026, 9:35 PM UTC 99 2.05 s 0.001 0 ms 174 kB 3/3 ±1 2,313 -7% 41.2s Wayback
Sep 7, 2026, 7:03 PM UTC 99 1.84 s 0.001 0 ms 203 kB 3/3 ±6 2,499 +1% 51.2s Wayback
Aug 31, 2026, 5:56 PM UTC 96 1.92 s 0.092 0 ms 217 kB 3/3 ±1 2,467 -1% 45.3s Wayback
Aug 24, 2026, 4:35 PM UTC 96 1.93 s 0.092 0 ms 216 kB 3/3 ±25 2,968 +19% 49.6s Wayback
Aug 23, 2026, 4:24 PM UTC 95 2.21 s 0.092 0 ms 217 kB 3/3 ±25 2,366 -5% 53.9s Wayback
Aug 22, 2026, 3:21 PM UTC 97 1.84 s 0.092 0 ms 210 kB 3/3 ±0 2,476 0% 51.8s Wayback
Aug 21, 2026, 2:44 PM UTC 97 2.06 s 0.092 0 ms 207 kB 3/3 ±2 2,457 -1% 50.1s Wayback

Embed this score

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