Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.29 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
33.57 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.61 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.079
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.28 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.
33.93 s
Page Load Progression
FPage Weight BudgetAction9.2 MB transferred, 98 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction7364ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.aau.dk/_next/static/chunks/framework-b0ec748c7a4c483a.js | 1884ms | 1531ms | 19ms | 3rd |
| Unattributable | 1019ms | 17ms | 0ms | 3rd |
| https://policy.app.cookieinformation.com/latest/aau.dk/default.js | 984ms | 47ms | 438ms | 3rd |
| https://www.aau.dk/ | 878ms | 14ms | 1ms | 3rd |
| https://policy.app.cookieinformation.com/uc.js | 616ms | 117ms | 8ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-K2LH48 | 603ms | 477ms | 66ms | 3rd |
| https://www.aau.dk/_next/static/chunks/pages/_app-11d1e030853fd03c.js | 601ms | 388ms | 160ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-N8738YD05W&cx=c>m=4e64k1 | 313ms | 242ms | 68ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-1387381&cx=c>m=4e64k1 | 192ms | 141ms | 50ms | 3rd |
| https://www.aau.dk/_next/static/chunks/pages/_sites/%5Borigin%5D/ISR/%5B%5B...slug%5D%5D-e19e210c9bf69b92.js | 172ms | 167ms | 1ms | 3rd |
Showing top 10 of 11 scripts
FJS BundlesAction32 scripts, 537 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.aau.dk/_next/static/chunks/pages/_app-11d1e030853fd03c.js | 342 KB | 254 KB (75%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-N8738YD05W&cx=c>m=4e64k1 | 172 KB | 85 KB (49%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-K2LH48 | 174 KB | 81 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-1387381&cx=c>m=4e64k1 | 131 KB | 74 KB (57%) | ✓ | 3rd |
| https://www.aau.dk/_next/static/chunks/7013-f2380881e1e9bd63.js | 57 KB | 43 KB (79%) | ✓ | 3rd |
| https://www.aau.dk/_next/static/chunks/webpack-f2fd430b743e5615.js | 8 KB | — | ✓ | 3rd |
| https://www.aau.dk/_next/static/chunks/main-6f119220507e615f.js | 41 KB | — | ✓ | 3rd |
| https://www.aau.dk/_next/static/chunks/1810.93b3159bb3cc6b1f.js | 4 KB | — | ✓ | 3rd |
| https://www.aau.dk/_next/static/chunks/5414.de5cc899cbd6df95.js | 5 KB | — | ✓ | 3rd |
| https://www.aau.dk/_next/static/chunks/7734.f42387635131d503.js | 4 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction98 resources · 9.2 MB · 537 KB savings availableFIX
~536.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 98 resources | 9.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization26 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (179 KB)PASS
Web fonts
7
179 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
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)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints18 hints, 0 missing preconnectsPASS
Current Resource Hints
18 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall98 requests over 3026msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.aau.dk www.aau.dk | Other | 1884ms | 47 KB | — | kr154/mo | Costly |
Unattributable Unattributable | Other | 1019ms | 0 KB | — | kr83/mo | Costly |
policy.app.cookieinformation.com policy.app.cookieinformation.com | Other | 984ms | 3590 KB | — | kr80/mo | Costly |
www.aau.dk www.aau.dk | Other | 878ms | 53 KB | — | kr72/mo | Costly |
policy.app.cookieinformation.com policy.app.cookieinformation.com | Other | 616ms | 12 KB | — | kr50/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 603ms | 174 KB | 47% | kr49/mo | Costly |
www.aau.dk www.aau.dk | Other | 601ms | 342 KB | 75% | kr49/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 313ms | 172 KB | 49% | kr26/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 192ms | 131 KB | 57% | kr16/mo | Optional |
www.aau.dk www.aau.dk | Other | 172ms | 4 KB | — | kr14/mo | Optional |
www.aau.dk www.aau.dk | Other | 103ms | 41 KB | — | kr8/mo | Optional |
These scripts may cost more than they're worth
- www.aau.dk adds 1884ms and costs ~kr154/month
- Unattributable adds 1019ms and costs ~kr83/month
- policy.app.cookieinformation.com adds 984ms and costs ~kr80/month
- www.aau.dk adds 878ms and costs ~kr72/month
- policy.app.cookieinformation.com adds 616ms and costs ~kr50/month
- Google Tag Manager adds 603ms and costs ~kr49/month
- www.aau.dk adds 601ms and costs ~kr49/month
- Google Tag Manager adds 313ms and costs ~kr26/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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
www.aau.dk takes 1884ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 1019ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
policy.app.cookieinformation.com takes 984ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.aau.dk takes 878ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
policy.app.cookieinformation.com takes 616ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 603ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.aau.dk takes 601ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
75% of www.aau.dk's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 313ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
57% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev