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https://au.dk

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
68
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
94
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.72 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

3.44 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

16 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.003

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.24 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

4.29 s

Page Load Progression

481 ms
961 ms
1.4 s
1.9 s
2.4 s
2.9 s
3.4 s
3.8 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
4.8 MB transferred, 61 requests
FIX
4.8 MB transferred, 61 requests
Critical::
Page weighs 7.7 MB (4.8 MB transferred)
Warning::
Images are 3.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.7 MB
Warning::
JavaScript is 788 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 788 KB
Info::
61 HTTP requests
Info::
Estimated 1.00 g CO2 per page load
4.8 MB / 2.4 MB budget
4.8 MB transferred
61 requests
1.00 g CO2 per page load
Images 3.7 MiB 78%
JavaScript 788.3 KiB 16%
CSS 104.1 KiB 2%
Fonts 102.4 KiB 2%
HTML 41.0 KiB 1%
Other 31.7 KiB 1%
Other 293 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (4.8 MiB of 4.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
22 scripts, 472 KB unused
FIX
22 scripts, 472 KB unused
Warning::
https://cdn.apple-mapkit.com/mk/5.x.x/mapkit.js: 205 KB unused (89%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.au.dk/2016/assets/js/vendor.js: 94 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WXR...: 68 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.jsdelivr.net/npm/react-dom@16.13.1/umd...: 31 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.au.dk/apps/react/findwidget/6.0.2/app....: 27 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 472 KB
472 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.apple-mapkit.com/mk/5.x.x/mapkit.js232 KB205 KB (89%)✓3rd
https://cdn.au.dk/2016/assets/js/vendor.js123 KB94 KB (77%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WXRLNF120 KB68 KB (57%)✓3rd
https://cdn.jsdelivr.net/npm/react-dom@16.13.1/umd/react-dom.production.min.js38 KB31 KB (83%)✓3rd
https://cdn.au.dk/apps/react/findwidget/6.0.2/app.js41 KB27 KB (67%)✓3rd
https://customer.cludo.com/scripts/bundles/search-script.min.js51 KB26 KB (52%)✓3rd
https://www.au.dk/_assets/948410ace0dfa9ad00627133d9ca8a23/JavaScript/Powermail/Form.min.js?177349393728 KB21 KB (75%)✓3rd
https://www.au.dk/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js1 KB—✓3rd
https://cdn.jsdelivr.net/npm/es6-shim@0.35.5/es6-shim.min.js17 KB—✓3rd
https://www.au.dk/fileadmin/www.au.dk/AU_i_tal/forside-tal/js/locations-da_v2.js?v=22 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
61 resources · 4.8 MB · 472 KB savings available
FIX
61 resources · 4.8 MB · 472 KB savings available
Warning::
Page weight 3.8 MB over 1MB target
Got: 4.8 MB Expected: ≤ 1 MB
Info::
~472 KB of savings available
Warning::
60 third-party resources (100% of weight)
Info::
9 resources over 200KB
61 resources · 4.8 MiB · 60 third-party 3.8 MiB over 1MB target
Image 79% · 3.8 MiB
JavaScript 16% · 788.3 KiB
CSS 2% · 104.1 KiB
Font 2% · 102.4 KiB
Document 1% · 41.0 KiB
Other 0% · 352 B

~472.3 KiB of savings available

Remove unused JavaScript: 472.3 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Warning::
https://cdn.au.dk/2016/assets/img/au_segl.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19 images 3.7 MB
0 oversized -0 KB
19 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Execution Cost
612ms total JS execution
REVIEW
612ms total JS execution
Info::
https://cdn.au.dk/2016/assets/js/vendor.js: 178ms CPU time
Info::
https://www.au.dk/: 162ms CPU time
Info::
https://cdn.cookie-script.com/s/a8ca7e688df75cd8a6...: 143ms CPU time
Info::
Unattributable: 129ms CPU time
Warning::
Third-party scripts: 612ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Style & Layout 22% Other 20% Script Parsing & Compilation 12% Parse HTML & CSS 6% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://cdn.au.dk/2016/assets/js/vendor.js178ms148ms15ms3rd
https://www.au.dk/162ms2ms1ms3rd
https://cdn.cookie-script.com/s/a8ca7e688df75cd8a6a03fcab6d18143.js143ms36ms14ms3rd
Unattributable129ms2ms0ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
4 fonts (102 KB)
PASS
4 fonts (102 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

102 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 1.7 s LCP 3.4 shttps://fonts.au.dk/fonts/aupassata_bold-webfont.woff2aupassata_bold-webfont.... https://fonts.au.dk/fonts/aupassata_bold-webfont.woff2 — 29.8 KiB — 266 ms — font-display: swaphttps://fonts.au.dk/fonts/au_icons.woffau_icons.woff https://fonts.au.dk/fonts/au_icons.woff — 18.2 KiB — 261 ms — font-display: swaphttps://fonts.au.dk/fonts/aupassata_rg-webfont.woff2aupassata_rg-webfont.woff2 https://fonts.au.dk/fonts/aupassata_rg-webfont.woff2 — 33.1 KiB — 265 ms — font-display: swaphttps://fonts.au.dk/fonts/autohinting/aupassata_bold-webfont.woff2aupassata_bold-webfont.... https://fonts.au.dk/fonts/autohinting/aupassata_bold-webfont.woff2 — 21.3 KiB — 10 ms — font-display: swap
aupassata_bold-webfont.... woff2 swap
Size 30 KB
Load time 266 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
au_icons.woff woff swap
Size 18 KB
Load time 261 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
aupassata_rg-webfont.woff2 woff2 swap
Size 33 KB
Load time 265 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
aupassata_bold-webfont.... woff2 swap
Size 21 KB
Load time 10 ms
Start 3.3 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~5 KB and ~10 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
61 requests over 4087ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.7 s LCP 3.4 shttps://au.dk// https://au.dk/ — 302 — 59 B — 834 ms — h2https://www.au.dk/www.au.dk/ https://www.au.dk/ — 200 — 12.1 KiB — 468 ms — h3https://www.au.dk/typo3temp/assets/css/4adea90c81bdd79ac4f5be3b55a7851c.css?1774258798www.au.dk/typo3temp/assets/css/4ade... https://www.au.dk/typo3temp/assets/css/4adea90c81bdd79ac4f5be3b55a7851c.css?1774258798 — 200 — 1.3 KiB — 14 ms — h3https://cdn.au.dk/2016/assets/css/app.csscdn.au.dk/2016/assets/css/app.css https://cdn.au.dk/2016/assets/css/app.css — 200 — 39.7 KiB — 250 ms — h2https://cdn.au.dk/components/umd/all.csscdn.au.dk/components/umd/all.css https://cdn.au.dk/components/umd/all.css — 200 — 5.8 KiB — 243 ms — h2https://www.au.dk/_assets/bba0af3e32dafabe31c0da8e169fa8c4/Css/fluid_styled_content.css?1775815305www.au.dk/_assets/bba0af3e32dafabe3... https://www.au.dk/_assets/bba0af3e32dafabe31c0da8e169fa8c4/Css/fluid_styled_content.css?1775815305 — 200 — 469 B — 19 ms — h3https://www.au.dk/_assets/56b797f8bb08f87b2b0a4b7706a3f2d6/Css/Powermail/CssDemo.css?1775815301www.au.dk/_assets/56b797f8bb08f87b2... https://www.au.dk/_assets/56b797f8bb08f87b2b0a4b7706a3f2d6/Css/Powermail/CssDemo.css?1775815301 — 200 — 402 B — 23 ms — h3https://www.au.dk/_assets/56b797f8bb08f87b2b0a4b7706a3f2d6/Css/powermail-overrides.css?1775815301www.au.dk/_assets/56b797f8bb08f87b2... https://www.au.dk/_assets/56b797f8bb08f87b2b0a4b7706a3f2d6/Css/powermail-overrides.css?1775815301 — 200 — 2.3 KiB — 27 ms — h3https://www.au.dk/_assets/d336a48cc75b0ce72905efb565ce5df1/Css/news-basic.css?1775815305www.au.dk/_assets/d336a48cc75b0ce72... https://www.au.dk/_assets/d336a48cc75b0ce72905efb565ce5df1/Css/news-basic.css?1775815305 — 200 — 3.4 KiB — 28 ms — h3https://customer.cludo.com/css/511/2151/cludo-search.min.csscustomer.cludo.com/css/511/2151/clu... https://customer.cludo.com/css/511/2151/cludo-search.min.css — 200 — 8.5 KiB — 476 ms — h2https://cdn.jsdelivr.net/npm/react@16.13.1/umd/react.production.min.jscdn.jsdelivr.net/npm/react@16.13.1/... https://cdn.jsdelivr.net/npm/react@16.13.1/umd/react.production.min.js — 200 — 5.1 KiB — 42 ms — h2https://cdn.jsdelivr.net/npm/react-dom@16.13.1/umd/react-dom.production.min.jscdn.jsdelivr.net/npm/react-dom@16.1... https://cdn.jsdelivr.net/npm/react-dom@16.13.1/umd/react-dom.production.min.js — 200 — 37.8 KiB — 51 ms — h2https://cdn.jsdelivr.net/npm/axios@0.19.2/dist/axios.min.jscdn.jsdelivr.net/npm/axios@0.19.2/d... https://cdn.jsdelivr.net/npm/axios@0.19.2/dist/axios.min.js — 200 — 4.9 KiB — 50 ms — h2https://cdn.jsdelivr.net/npm/dom4@2.1.5/build/dom4.jscdn.jsdelivr.net/npm/dom4@2.1.5/bui... https://cdn.jsdelivr.net/npm/dom4@2.1.5/build/dom4.js — 200 — 4.2 KiB — 46 ms — h2https://cdn.jsdelivr.net/npm/es6-shim@0.35.5/es6-shim.min.jscdn.jsdelivr.net/npm/es6-shim@0.35.... https://cdn.jsdelivr.net/npm/es6-shim@0.35.5/es6-shim.min.js — 200 — 16.9 KiB — 50 ms — h2https://cdn.au.dk/2016/assets/js/vendor.jscdn.au.dk/2016/assets/js/vendor.js https://cdn.au.dk/2016/assets/js/vendor.js — 200 — 123.2 KiB — 247 ms — h2https://cdn.au.dk/2016/assets/js/app.jscdn.au.dk/2016/assets/js/app.js https://cdn.au.dk/2016/assets/js/app.js — 200 — 15.3 KiB — 238 ms — h2https://cdn.jsdelivr.net/npm/@aarhus-university/au-designsystem-delphinus@latest/public/projects/typo3/js/app.jscdn.jsdelivr.net/npm/@aarhus-univer... https://cdn.jsdelivr.net/npm/@aarhus-university/au-designsystem-delphinus@latest/public/projects/typo3/js/app.js — 200 — 3.7 KiB — 45 ms — h2https://www.au.dk/_assets/d336a48cc75b0ce72905efb565ce5df1/JavaScript/Infobox.js?1775815305www.au.dk/_assets/d336a48cc75b0ce72... https://www.au.dk/_assets/d336a48cc75b0ce72905efb565ce5df1/JavaScript/Infobox.js?1775815305 — 200 — 1.3 KiB — 30 ms — h3https://www.au.dk/fileadmin/www.au.dk/AU_i_tal/forside-tal/js/locations-da_v2.js?v=2www.au.dk/fileadmin/www.au.dk/AU_i_... https://www.au.dk/fileadmin/www.au.dk/AU_i_tal/forside-tal/js/locations-da_v2.js?v=2 — 200 — 1.6 KiB — 30 ms — h3https://cdn.jsdelivr.net/npm/@aarhus-university/au-designsystem-delphinus@latest/public/projects/typo3/style.csscdn.jsdelivr.net/npm/@aarhus-univer... https://cdn.jsdelivr.net/npm/@aarhus-university/au-designsystem-delphinus@latest/public/projects/typo3/style.css — 200 — 38.7 KiB — 48 ms — h2https://cdn.au.dk/2016/assets/img/au_segl.svgcdn.au.dk/2016/assets/img/au_segl.s... https://cdn.au.dk/2016/assets/img/au_segl.svg — 200 — 16.3 KiB — 242 ms — h2https://www.au.dk/fileadmin/www.au.dk/Hero-forside/Forskningens_Dogn_2023_Grafik_1000px_mobil.pngwww.au.dk/fileadmin/www.au.dk/Hero-... https://www.au.dk/fileadmin/www.au.dk/Hero-forside/Forskningens_Dogn_2023_Grafik_1000px_mobil.png — 200 — 69.3 KiB — 30 ms — h3https://cdn.au.dk/apps/react/presentation/5.2.0/presentation.csscdn.au.dk/apps/react/presentation/5... https://cdn.au.dk/apps/react/presentation/5.2.0/presentation.css — 200 — 2.5 KiB — 315 ms — h2https://www.au.dk/fileadmin/gridelements/gymnasieportalen_04.jpgwww.au.dk/fileadmin/gridelements/gy... https://www.au.dk/fileadmin/gridelements/gymnasieportalen_04.jpg — 200 — 131.1 KiB — 17 ms — h3https://www.au.dk/fileadmin/gridelements/netvaerksdag-for-skoleledere_03.jpgwww.au.dk/fileadmin/gridelements/ne... https://www.au.dk/fileadmin/gridelements/netvaerksdag-for-skoleledere_03.jpg — 200 — 149.7 KiB — 19 ms — h3https://www.au.dk/fileadmin/gridelements/Det_rullende_universitet_01.jpgwww.au.dk/fileadmin/gridelements/De... https://www.au.dk/fileadmin/gridelements/Det_rullende_universitet_01.jpg — 200 — 309.2 KiB — 23 ms — h3https://cdn.au.dk/apps/react/some/3.4.0/some.csscdn.au.dk/apps/react/some/3.4.0/som... https://cdn.au.dk/apps/react/some/3.4.0/some.css — 200 — 1.0 KiB — 123 ms — h2https://www.au.dk/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.jswww.au.dk/cdn-cgi/scripts/5c5dd728/... https://www.au.dk/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js — 200 — 726 B — 7 ms — h3https://cdn.au.dk/apps/react/findwidget/6.0.2/app.jscdn.au.dk/apps/react/findwidget/6.0... https://cdn.au.dk/apps/react/findwidget/6.0.2/app.js — 200 — 41.3 KiB — 10 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.7 s LCP 3.4 shttps://au.dk// https://au.dk/ — 302 — 59 B — 834 ms — h2https://www.au.dk/www.au.dk/ https://www.au.dk/ — 200 — 12.1 KiB — 468 ms — h3https://www.au.dk/typo3temp/assets/css/4adea90c81bdd79ac4f5be3b55a7851c.css?1774258798www.au.dk/typo3temp/assets/css/4ade... https://www.au.dk/typo3temp/assets/css/4adea90c81bdd79ac4f5be3b55a7851c.css?1774258798 — 200 — 1.3 KiB — 14 ms — h3https://cdn.au.dk/2016/assets/css/app.csscdn.au.dk/2016/assets/css/app.css https://cdn.au.dk/2016/assets/css/app.css — 200 — 39.7 KiB — 250 ms — h2https://cdn.au.dk/components/umd/all.csscdn.au.dk/components/umd/all.css https://cdn.au.dk/components/umd/all.css — 200 — 5.8 KiB — 243 ms — h2https://www.au.dk/_assets/bba0af3e32dafabe31c0da8e169fa8c4/Css/fluid_styled_content.css?1775815305www.au.dk/_assets/bba0af3e32dafabe3... https://www.au.dk/_assets/bba0af3e32dafabe31c0da8e169fa8c4/Css/fluid_styled_content.css?1775815305 — 200 — 469 B — 19 ms — h3https://www.au.dk/_assets/56b797f8bb08f87b2b0a4b7706a3f2d6/Css/Powermail/CssDemo.css?1775815301www.au.dk/_assets/56b797f8bb08f87b2... https://www.au.dk/_assets/56b797f8bb08f87b2b0a4b7706a3f2d6/Css/Powermail/CssDemo.css?1775815301 — 200 — 402 B — 23 ms — h3https://www.au.dk/_assets/56b797f8bb08f87b2b0a4b7706a3f2d6/Css/powermail-overrides.css?1775815301www.au.dk/_assets/56b797f8bb08f87b2... https://www.au.dk/_assets/56b797f8bb08f87b2b0a4b7706a3f2d6/Css/powermail-overrides.css?1775815301 — 200 — 2.3 KiB — 27 ms — h3https://www.au.dk/_assets/d336a48cc75b0ce72905efb565ce5df1/Css/news-basic.css?1775815305www.au.dk/_assets/d336a48cc75b0ce72... https://www.au.dk/_assets/d336a48cc75b0ce72905efb565ce5df1/Css/news-basic.css?1775815305 — 200 — 3.4 KiB — 28 ms — h3https://customer.cludo.com/css/511/2151/cludo-search.min.csscustomer.cludo.com/css/511/2151/clu... https://customer.cludo.com/css/511/2151/cludo-search.min.css — 200 — 8.5 KiB — 476 ms — h2https://cdn.jsdelivr.net/npm/react@16.13.1/umd/react.production.min.jscdn.jsdelivr.net/npm/react@16.13.1/... https://cdn.jsdelivr.net/npm/react@16.13.1/umd/react.production.min.js — 200 — 5.1 KiB — 42 ms — h2https://cdn.jsdelivr.net/npm/react-dom@16.13.1/umd/react-dom.production.min.jscdn.jsdelivr.net/npm/react-dom@16.1... https://cdn.jsdelivr.net/npm/react-dom@16.13.1/umd/react-dom.production.min.js — 200 — 37.8 KiB — 51 ms — h2https://cdn.jsdelivr.net/npm/axios@0.19.2/dist/axios.min.jscdn.jsdelivr.net/npm/axios@0.19.2/d... https://cdn.jsdelivr.net/npm/axios@0.19.2/dist/axios.min.js — 200 — 4.9 KiB — 50 ms — h2https://cdn.jsdelivr.net/npm/dom4@2.1.5/build/dom4.jscdn.jsdelivr.net/npm/dom4@2.1.5/bui... https://cdn.jsdelivr.net/npm/dom4@2.1.5/build/dom4.js — 200 — 4.2 KiB — 46 ms — h2https://cdn.jsdelivr.net/npm/es6-shim@0.35.5/es6-shim.min.jscdn.jsdelivr.net/npm/es6-shim@0.35.... https://cdn.jsdelivr.net/npm/es6-shim@0.35.5/es6-shim.min.js — 200 — 16.9 KiB — 50 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 612ms · 192KB · kr50/mo
cdn.au.dk
Other
Optional
Execution 178ms
Transfer 123 KB
Unused 77%
Monthly Cost kr15/mo
www.au.dk
Other
Optional
Execution 162ms
Transfer 12 KB
Monthly Cost kr13/mo
Cookie Script
Consent
Essential
Execution 143ms
Transfer 57 KB
Monthly Cost kr12/mo
Unattributable
Other
Optional
Execution 129ms
Transfer 0 KB
Monthly Cost kr11/mo

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

77% of cdn.au.dk's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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