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

embl.org

https://www.embl.org/

74PERF 91A11Y 100BEST 100SEO ✗AXE !CWV

Ranks Overall #1,625 Built Awesome #1,065

Data from Oct 5, 2026, 8:27 AM UTC old Measured once a week · 7 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

Uses Alpine.js 3.10.0Alpine.js 3.10.0
Self-hosted · Apache Hosted by Self-hosted

Lighthouse Scores LAB Simulated

74
Performance
↑ +24 (+48%)
91
Accessibility
↓ -6 (-6.2%)
100
Best Practices
no change
100
SEO
no change

Metrics LAB FIELD

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

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-06 → 2026-10-03), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 4.12 s poor ↓ -1783 ms (-30.2%) 3.08 s – 10.32 s 2.59 s needs work 73.5% 16.8% 9.7%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 101 ms good 93.3% 6.1% 0.6%
CLS CWV Cumulative Layout Shift 0.247 needs work ↓ -0.641 (-72.2%) 0 – 1.041 0.170 needs work 67.6% 11% 21.4%
TBT Total Blocking Time 90 ms good ↑ +5 ms (+5.9%) 60 ms – 140 ms n/a —
FCP First Contentful Paint 1.19 s good ↓ -1221 ms (-50.6%) 1.19 s – 4.40 s 1.89 s needs work 73.1% 16.9% 9.9%
Speed Index 1.19 s good ↓ -2481 ms (-67.5%) 1.19 s – 5.10 s n/a —
TTFB Time to First Byte 715 ms good ↓ -555 ms (-43.7%) significant 715 ms – 1.28 s 1.14 s needs work 62.2% 25% 12.8%

LCP Subparts LAB Unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.

resource load delay 133 ms
time to first byte 111 ms
element render delay 56 ms
resource load duration 14 ms

LCP LAB Simulated vs LCP FIELD

Lab 4.12 s
Field p75 2.59 s

The lab LCP is 1.59× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 1.47 MB ↓ -653.6 kB (-31.3%) significant 1.47 MB – 2.14 MB
Requests 32 ↓ -2 (-5.9%) 28 – 34
Third-party Weight 641 kB ↓ -5.1 kB (-0.8%) 619 kB – 646 kB
Third-party CPU 82 ms ↑ +5 ms (+6.7%) 61 ms – 83 ms
Unused JS 82.4 kB ↑ +3.4 kB (+4.4%) 76.5 kB – 82.4 kB
Unused CSS 19.8 kB ↑ +122 B (+0.6%) 19.7 kB – 19.8 kB

By resource type

Type Transfer Share Size Requests
image 55% 798 kB 13
font 21.8% 317 kB 4
script 16.7% 243 kB 3
other 4.3% 62.6 kB 9
stylesheet 1.7% 24.1 kB 1
document 0.4% 6.4 kB 1
Total 1.47 MB 32

Third parties 5 entities

Entity Transfer Size Main thread Simulated
cloudimg.io image 408 kB 0 ms
Google Tag Manager script 197 kB 72 ms
Cloudflare CDN 19.1 kB 10 ms
emblstatic.net 16.3 kB 0 ms
GitHub 412 B 0 ms
Total 641 kB 82 ms

Page health

Metric Value Change / range Trend
Main Thread Work 815 ms ↓ -95 ms (-10.4%) 640 ms – 910 ms
Long Tasks 2 → no change 2 – 3
DOM Elements 335 ↓ -7 (-2%) 335 – 343
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 46 ↓ -1 (-2.1%) 45 – 47
A11y Failures 2 ↑ +1 (+100%) significant 1 – 2
A11y Failing Nodes 2 ↑ +1 (+100%) significant 1 – 2

Main thread work

Task Time Share Duration Simulated
script evaluation 35% 289 ms
other 24% 193 ms
style layout 18% 150 ms
script parse compile 14% 115 ms
paint composite render 4% 35 ms
parse HTML 3% 22 ms
garbage collection 1% 11 ms
Total 815 ms

Axe violations axe-core 4.13.0, full rule set

46 violating nodes across 3 rules, 521 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 44 nodes
    Offending elements (5 of 44)
    1. .vf-text-body--2 
      <p class="vf-text vf-text-body--2"> This website uses cookies, and the limited&nbsp;processing of your personal data to function. By using the site you are agreeing to this as outlined in our&nbsp;<a…
    2. .vf-hero 
      <section class="vf-hero vf-hero--1200 | vf-u-fullbleed" style="--vf-hero--bg-image: url(https://acxngcvroo.cloudimg.io/v7/https://www.embl.org/files/wp-content/uploads/20201202_hero_emblorg_homepage-…
    3. section[data-vf-google-analytics-region="news"] > .vf-section-header 
      <div class="vf-section-header">
    4. article[data-embl-js-conditional-edit="2658385"] > .vf-summary__date 
      <span class="vf-summary__date">05 Oct 2026</span>
    5. article[data-embl-js-conditional-edit="2658385"] > .vf-summary__image[alt="News image"] 
      <img src="https://acxngcvroo.cloudimg.io/v7/https://www.embl.org/news/wp-content/uploads/2026/10/Cover-final-1000x600-1.jpg?w=600&amp;h=400&amp;force_format=jpeg&amp;q=30" alt="News image" class="vf-…
  • moderate landmark-one-main — Document should have one main landmark 1 node
    Offending element
    1. html 
      <html lang="en" class="vf-js">
  • moderate landmark-unique — Landmarks should have a unique role or role/label/title (i.e. accessible name) combination 1 node
    Offending element
    1. .vf-navigation--global 
      <nav class="vf-navigation vf-navigation--global | vf-cluster">

Accessibility failures 2 of 17 audits

  • target-size — Touch targets do not have sufficient size or spacing. 1 node
  • landmark-one-main — Document does not have a main landmark. 1 node

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 2.48 s 95 ms 0.160 1.75 s 1.05 s
2026-09-19 2.47 s 94 ms 0.160 1.78 s 1.05 s
2026-09-12 2.53 s 95 ms 0.170 1.91 s 1.15 s
2026-09-05 2.59 s 96 ms 0.170 1.94 s 1.16 s
2026-08-29 2.63 s 96 ms 0.170 1.99 s 1.19 s
2026-08-22 2.68 s 99 ms 0.160 1.98 s 1.19 s
2026-08-15 2.65 s 96 ms 0.150 1.91 s 1.13 s
2026-08-08 2.54 s 94 ms 0.140 1.82 s 1.08 s
2026-08-01 2.52 s 91 ms 0.130 1.76 s 1.05 s
2026-07-25 2.49 s 89 ms 0.120 1.74 s 1.09 s
2026-07-18 2.49 s 90 ms 0.130 1.75 s 1.10 s
2026-07-11 2.54 s 89 ms 0.140 1.83 s 1.15 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 5, 2026, 8:27 AM UTC 74 4.12 s 0.247 90 ms 1.47 MB 3/3 ±12 2,262 -9% 27.6s Wayback
Sep 28, 2026, 3:54 AM UTC 50 5.90 s 0.888 85 ms 2.14 MB 3/3 ±17 2,488 0% 31.2s Wayback
Sep 20, 2026, 11:02 PM UTC 69 3.08 s 1.012 99 ms 2.11 MB 3/3 ±22 2,440 -2% 27.4s Wayback
Sep 13, 2026, 10:59 PM UTC 62 4.21 s 0.763 77 ms 2.12 MB 3/3 ±20 2,306 -7% 28.4s Wayback
Sep 6, 2026, 9:07 PM UTC 61 10.32 s 0 140 ms 1.85 MB 3/3 ±2 2,350 -5% 31.3s Wayback
Aug 30, 2026, 8:45 PM UTC 62 4.10 s 0.907 60 ms 2.11 MB 3/3 ±12 2,981 +20% 27.9s Wayback
Aug 21, 2026, 11:42 AM UTC 61 3.64 s 1.041 70 ms 2.11 MB 3/3 ±23 2,494 0% 37.7s Wayback

Embed this score

Use this web component to show embl.org'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.embl.org/"></speedlify2-score>