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https://uni-bonn.de

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
39
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
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.
100
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.

5.43 s

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

10.35 s

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

680 ms

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

0.002

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

11.63 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.

10.84 s

Page Load Progression

1.1 s
2.3 s
3.4 s
4.6 s
5.7 s
6.8 s
8.0 s
9.1 s
Checks
17
7 PASS 3 REVIEW 5 FIX
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 (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3356ms total JS execution
FIX
3356ms total JS execution
Warning::
https://www.uni-bonn.de/de: 948ms CPU time
Warning::
https://www.uni-bonn.de/++webresource++34f34eab-a1...: 746ms CPU time
Warning::
https://www.uni-bonn.de/++theme++interaktiv.baseti...: 629ms CPU time
Warning::
Unattributable: 373ms CPU time
Warning::
https://www.uni-bonn.de/++theme++unibonn.theme/js/...: 338ms CPU time
Warning::
Third-party scripts: 3356ms (100% of total)

Main Thread Breakdown

Script Evaluation 37% Style & Layout 24% Other 16% Script Parsing & Compilation 11% Parse HTML & CSS 6% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.uni-bonn.de/de948ms100ms2ms3rd
https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/bundle.min.js746ms370ms38ms3rd
https://www.uni-bonn.de/++theme++interaktiv.basetiles.components/js/mathjax/tex-mml-chtml.js629ms466ms138ms3rd
Unattributable373ms26ms0ms3rd
https://www.uni-bonn.de/++theme++unibonn.theme/js/libs.js?tag=15-04-2026_10-31-48338ms166ms97ms3rd
https://www.uni-bonn.de/++theme++unibonn.theme/css/style.css?tag=15-04-2026_10-31-15150ms0ms0ms3rd
https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/chunks/4523.dd7bfbfce434b99c0c6d.min.js103ms94ms4ms3rd
https://www.uni-bonn.de/++theme++unibonn.theme/js/script.js?tag=15-04-2026_10-31-4870ms25ms45ms3rd
F
JS Bundles
Action
12 scripts, 501 KB unused
FIX
12 scripts, 501 KB unused
Warning::
https://www.uni-bonn.de/++theme++interaktiv.baseti...: 144 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uni-bonn.de/++theme++unibonn.theme/js/...: 136 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uni-bonn.de/++theme++unibonn.theme/js/...: 66 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uni-bonn.de/++webresource++34f34eab-a1...: 50 KB unused (81%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uni-bonn.de/++webresource++34f34eab-a1...: 41 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 501 KB
501 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.uni-bonn.de/++theme++interaktiv.basetiles.components/js/mathjax/tex-mml-chtml.js264 KB144 KB (55%)✓3rd
https://www.uni-bonn.de/++theme++unibonn.theme/js/libs.js?tag=15-04-2026_10-31-48202 KB136 KB (68%)✓3rd
https://www.uni-bonn.de/++theme++unibonn.theme/js/script.js?tag=15-04-2026_10-31-4893 KB66 KB (72%)✓3rd
https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/chunks/94174.51e677dc0d267848ecca.min.js63 KB50 KB (81%)✓3rd
https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/bundle.min.js104 KB41 KB (40%)✓3rd
https://webstat.hrz.uni-bonn.de/matomo.js67 KB38 KB (57%)✓3rd
https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/chunks/7035.35ca9961e87c57b41938.min.js29 KB27 KB (100%)✓3rd
https://www.uni-bonn.de/++webresource++6aa4c841-faf5-51e8-8109-90bd97e7aa07/++plone++static/plone-fullscreen/fullscreen.js2 KB—✓3rd
https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/chunks/4523.dd7bfbfce434b99c0c6d.min.js9 KB—✓3rd
https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/chunks/64061.dee5804717c65fd6a61f.min.js8 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
40 resources · 1.6 MB · 501 KB savings available
FIX
40 resources · 1.6 MB · 501 KB savings available
Warning::
Page weight 603 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~501 KB of savings available
Warning::
39 third-party resources (100% of weight)
Info::
3 resources over 200KB
40 resources · 1.6 MiB · 39 third-party 602.9 KiB over 1MB target
JavaScript 52% · 846.6 KiB
Image 18% · 289.8 KiB
CSS 17% · 270.3 KiB
Font 12% · 192.6 KiB
Document 1% · 21.1 KiB
Other 0% · 6.6 KiB

~501.3 KiB of savings available

Remove unused JavaScript: 501.3 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.

C
Page Weight Budget
Action
1.6 MB transferred, 40 requests
REVIEW
1.6 MB transferred, 40 requests
Info::
Page weighs 5.1 MB (1.6 MB transferred)
Warning::
JavaScript is 847 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 847 KB
Info::
CSS is 270 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 270 KB
Info::
40 HTTP requests
Info::
Estimated 0.33 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
40 requests
0.33 g CO2 per page load
JavaScript 846.6 KiB 52%
Images 270.6 KiB 17%
CSS 270.3 KiB 17%
Fonts 192.6 KiB 12%
Other 21.8 KiB 1%
HTML 20.0 KiB 1%
Other 4.9 KiB 0%
Other 207 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

B
Image Optimization
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Warning::
https://www.uni-bonn.de/de/++theme++unibonn.theme/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
7 images 271 KB
0 oversized -0 KB
4 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

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
10 fonts (193 KB)
PASS
10 fonts (193 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

193 KB total

Render-blocking

0

of 10

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 5.4 s LCP 10.3 shttps://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/roboto/roboto-v20-latin-ext_latin-regular.woff2roboto-v20-latin-ext_la... https://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/roboto/roboto-v20-latin-ext_latin-regular.woff2 — 23.6 KiB — 283 ms — font-display: swaphttps://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/icons/interaktiv-icon-basetilestheme.ttfinteraktiv-icon-basetil... https://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/icons/interaktiv-icon-basetilestheme.ttf — 17.3 KiB — 271 ms — font-display: swaphttps://www.uni-bonn.de/site/++theme++unibonn.theme/fonts/uni-bonn.ttfuni-bonn.ttf https://www.uni-bonn.de/site/++theme++unibonn.theme/fonts/uni-bonn.ttf — 16.6 KiB — 266 ms — font-display: swaphttps://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/exo2/exo-2-v9-latin-ext_latin-600.woff2exo-2-v9-latin-ext_lati... https://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/exo2/exo-2-v9-latin-ext_latin-600.woff2 — 23.8 KiB — 266 ms — font-display: swaphttps://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/exo2/exo-2-v9-latin-ext_latin-300.woff2exo-2-v9-latin-ext_lati... https://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/exo2/exo-2-v9-latin-ext_latin-300.woff2 — 22.9 KiB — 241 ms — font-display: swaphttps://www.uni-bonn.de/font-families/uni-bonn-official/view/++widget++form.widgets.file_woff/@@download@@download https://www.uni-bonn.de/font-families/uni-bonn-official/view/++widget++form.widgets.file_woff/@@download — 17.5 KiB — 233 ms — font-display: swaphttps://www.uni-bonn.de/font-families/kampagne/view/++widget++form.widgets.file_woff/@@download@@download https://www.uni-bonn.de/font-families/kampagne/view/++widget++form.widgets.file_woff/@@download — 8.0 KiB — 267 ms — font-display: swaphttps://www.uni-bonn.de/font-families/unibonn-fonts/view/++widget++form.widgets.file_woff/@@download@@download https://www.uni-bonn.de/font-families/unibonn-fonts/view/++widget++form.widgets.file_woff/@@download — 16.3 KiB — 294 ms — font-display: swaphttps://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/exo2/exo-2-v9-latin-ext_latin-regular.woff2exo-2-v9-latin-ext_lati... https://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/exo2/exo-2-v9-latin-ext_latin-regular.woff2 — 22.9 KiB — 265 ms — font-display: swaphttps://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/roboto/roboto-v20-latin-ext_latin-500.woff2roboto-v20-latin-ext_la... https://www.uni-bonn.de/++theme++unibonn.theme/css/++theme++interaktiv.basetiles/fonts/latin-ext/roboto/roboto-v20-latin-ext_latin-500.woff2 — 23.7 KiB — 256 ms — font-display: swap
roboto-v20-latin-ext_la... woff2 swap
Size 24 KB
Load time 283 ms
Start 5.0 s
Risk FOUT — text flashes from fallback to web font
interaktiv-icon-basetil... ttf swap
Size 17 KB
Load time 271 ms
Start 5.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
uni-bonn.ttf ttf swap
Size 17 KB
Load time 266 ms
Start 5.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
exo-2-v9-latin-ext_lati... woff2 swap
Size 24 KB
Load time 266 ms
Start 5.0 s
Risk FOUT — text flashes from fallback to web font
exo-2-v9-latin-ext_lati... woff2 swap
Size 23 KB
Load time 241 ms
Start 5.0 s
Risk FOUT — text flashes from fallback to web font
@@download woff swap
Size 17 KB
Load time 233 ms
Start 5.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
@@download woff swap
Size 8 KB
Load time 267 ms
Start 5.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
@@download woff swap
Size 16 KB
Load time 294 ms
Start 5.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
exo-2-v9-latin-ext_lati... woff2 swap
Size 23 KB
Load time 265 ms
Start 5.1 s
Risk FOUT — text flashes from fallback to web font
roboto-v20-latin-ext_la... woff2 swap
Size 24 KB
Load time 256 ms
Start 5.1 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 ~23 KB and ~46 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
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
40 requests over 7026ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 5.4 s LCP 10.3 shttps://uni-bonn.de// https://uni-bonn.de/ — 308 — 1.1 KiB — 801 ms — h2https://www.uni-bonn.de/www.uni-bonn.de/ https://www.uni-bonn.de/ — 302 — 1.5 KiB — 1.0 s — h2https://www.uni-bonn.de/dewww.uni-bonn.de/de https://www.uni-bonn.de/de — 200 — 20.0 KiB — 2.0 s — h2https://www.uni-bonn.de/++theme++barceloneta/css/barceloneta.min.csswww.uni-bonn.de/++theme++barcelonet... https://www.uni-bonn.de/++theme++barceloneta/css/barceloneta.min.css — 200 — 37.8 KiB — 403 ms — h2https://www.uni-bonn.de/++theme++unibonn.theme/css/style.css?tag=15-04-2026_10-31-15www.uni-bonn.de/++theme++unibonn.th... https://www.uni-bonn.de/++theme++unibonn.theme/css/style.css?tag=15-04-2026_10-31-15 — 200 — 226.3 KiB — 803 ms — h2https://www.uni-bonn.de/++webresource++b6e63fde-4269-5984-a67a-480840700e9a/++resource++easyform.csswww.uni-bonn.de/++webresource++b6e6... https://www.uni-bonn.de/++webresource++b6e63fde-4269-5984-a67a-480840700e9a/++resource++easyform.css — 200 — 1.9 KiB — 800 ms — h2https://www.uni-bonn.de/++webresource++f30a16e6-dac4-5f5f-a036-b24364abdfc8/++resource++plone.app.multilingual.stylesheet/multilingual.csswww.uni-bonn.de/++webresource++f30a... https://www.uni-bonn.de/++webresource++f30a16e6-dac4-5f5f-a036-b24364abdfc8/++resource++plone.app.multilingual.stylesheet/multilingual.css — 200 — 2.4 KiB — 800 ms — h2https://www.uni-bonn.de/++webresource++ac83a459-aa2c-5a45-80a9-9d3e95ae0847/++plone++static/plone-fullscreen/fullscreen.csswww.uni-bonn.de/++webresource++ac83... https://www.uni-bonn.de/++webresource++ac83a459-aa2c-5a45-80a9-9d3e95ae0847/++plone++static/plone-fullscreen/fullscreen.css — 200 — 1.8 KiB — 404 ms — h2https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/bundle.min.jswww.uni-bonn.de/++webresource++34f3... https://www.uni-bonn.de/++webresource++34f34eab-a19d-533e-a464-ddf672c6f922/++plone++static/bundle-plone/bundle.min.js — 200 — 104.0 KiB — 805 ms — h2https://www.uni-bonn.de/++theme++unibonn.theme/js/libs.js?tag=15-04-2026_10-31-48www.uni-bonn.de/++theme++unibonn.th... https://www.uni-bonn.de/++theme++unibonn.theme/js/libs.js?tag=15-04-2026_10-31-48 — 200 — 202.3 KiB — 994 ms — h2https://www.uni-bonn.de/++theme++unibonn.theme/js/script.js?tag=15-04-2026_10-31-48www.uni-bonn.de/++theme++unibonn.th... https://www.uni-bonn.de/++theme++unibonn.theme/js/script.js?tag=15-04-2026_10-31-48 — 200 — 93.4 KiB — 997 ms — h2https://www.uni-bonn.de/de/++theme++unibonn.theme/images/logos/logo_desktop.svgwww.uni-bonn.de/de/++theme++unibonn... https://www.uni-bonn.de/de/++theme++unibonn.theme/images/logos/logo_desktop.svg — 200 — 169.9 KiB — 1.0 s — h2https://www.uni-bonn.de/de/++theme++unibonn.theme/images/logos/logo_mobile.svgwww.uni-bonn.de/de/++theme++unibonn... 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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 3356ms · 919KB · €36/mo
www.uni-bonn.de
Other
Costly
Execution 948ms
Transfer 20 KB
Monthly Cost €10/mo
www.uni-bonn.de
Other
Costly
Execution 746ms
Transfer 104 KB
Unused 40%
Monthly Cost €8/mo
www.uni-bonn.de
Other
Costly
Execution 629ms
Transfer 264 KB
Unused 55%
Monthly Cost €7/mo
Unattributable
Other
Costly
Execution 373ms
Transfer 0 KB
Monthly Cost €4/mo
www.uni-bonn.de
Other
Costly
Execution 338ms
Transfer 202 KB
Unused 68%
Monthly Cost €4/mo
www.uni-bonn.de
Other
Optional
Execution 150ms
Transfer 226 KB
Monthly Cost €2/mo
www.uni-bonn.de
Other
Optional
Execution 103ms
Transfer 9 KB
Monthly Cost €1/mo
www.uni-bonn.de
Other
Optional
Execution 70ms
Transfer 93 KB
Unused 72%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.uni-bonn.de adds 948ms and costs ~€10/month
  • www.uni-bonn.de adds 746ms and costs ~€8/month
  • www.uni-bonn.de adds 629ms and costs ~€7/month
  • Unattributable adds 373ms and costs ~€4/month
  • www.uni-bonn.de adds 338ms and costs ~€4/month

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

www.uni-bonn.de takes 948ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.uni-bonn.de takes 746ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.uni-bonn.de takes 629ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

55% of www.uni-bonn.de'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

Unattributable takes 373ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.uni-bonn.de takes 338ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

68% of www.uni-bonn.de'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

72% of www.uni-bonn.de'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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