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

esif.dev

https://esif.dev/

97PERF 100A11Y 100BEST 92SEO ✓AXE –CWV

Ranks Overall #433 Built Awesome #334 zachleat #15

Data from Oct 3, 2026, 1:09 PM UTC old Measured once a week · 7 runs since Aug 20, 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 2.0.1 Built with Eleventy 2.0.1
Cloudflare Hosted by Cloudflare

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

97
Performance
↓ -1 (-1%)
100
Accessibility
no change
100
Best Practices
no change
92
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 2.29 s good ↑ +272 ms (+13.5%) 1.97 s – 2.37 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.017 good → no change 0.010 – 0.019
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 1.68 s good ↓ -99 ms (-5.6%) 1.68 s – 1.80 s
Speed Index 1.68 s good ↓ -99 ms (-5.6%) 1.68 s – 1.80 s
TTFB Time to First Byte 467 ms good ↓ -55 ms (-10.5%) 467 ms – 623 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.

resource load duration 877 ms
time to first byte 590 ms
element render delay 14 ms
resource load delay 13 ms

Page weight

Metric Value Change / range Trend
Page Weight 450 kB ↑ +120 B 449 kB – 451 kB
Requests 31 → no change 31 – 31
Third-party Weight 55.6 kB ↑ +55 B (+0.1%) 54.8 kB – 56.7 kB
Third-party CPU 4 ms ↓ -1 ms (-19.2%) 4 ms – 6 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 87.2% 392 kB 21
script 4.4% 19.8 kB 4
font 3.4% 15.4 kB 2
document 2.3% 10.4 kB 1
other 2.2% 10.0 kB 2
stylesheet 0.5% 2.2 kB 1
Total 450 kB 31

Third parties 3 entities

Entity Transfer Size Main thread Simulated
11ty.dev image 29.9 kB 0 ms
Google Fonts font 15.4 kB 0 ms
Cloudflare script 10.2 kB 4 ms
Total 55.6 kB 4 ms

Without JavaScript

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

Scripts disabled
As rendered

9.6% 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 474 ms ↓ -29 ms (-5.8%) 447 ms – 574 ms
Long Tasks 0 → no change 0 – 1
DOM Elements 868 → no change 868 – 868
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

Task Time Share Duration Simulated
other 40% 188 ms
script evaluation 26% 124 ms
style layout 21% 98 ms
paint composite render 9% 42 ms
parse HTML 4% 21 ms
script parse compile 0% 1 ms
Total 474 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 1458 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

SEO failures 1 of 9 audits

  • robots-txt — robots.txt is not valid 855 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 3, 2026, 1:09 PM UTC 97 2.29 s 0.017 0 ms 450 kB 3/3 ±1 2,447 -2% 51.6s Wayback
Sep 26, 2026, 9:11 AM UTC 98 2.02 s 0.017 0 ms 450 kB 3/3 ±4 2,486 0% 54.2s Wayback
Sep 19, 2026, 3:23 AM UTC 97 2.37 s 0.017 0 ms 450 kB 3/3 ±1 2,488 0% 54.7s Wayback
Sep 12, 2026, 1:07 AM UTC 97 2.32 s 0.019 0 ms 450 kB 3/3 ±1 2,293 -8% 53.5s Wayback
Sep 4, 2026, 11:55 PM UTC 98 1.97 s 0.019 0 ms 450 kB 3/3 ±0 2,495 0% 30.2s Wayback
Aug 28, 2026, 11:34 PM UTC 98 2.10 s 0.010 0 ms 449 kB 3/3 ±2 2,300 -8% 32.1s Wayback
Aug 20, 2026, 9:40 PM UTC 98 2.05 s 0.017 0 ms 451 kB 3/3 ±1 2,503 +1% 29.6s Wayback

Embed this score

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