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https://unibas.ch

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
56
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.

7.19 s

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

24.25 s

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

86 ms

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

0.000

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

8.74 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.

28.54 s

Page Load Progression

474 ms
947 ms
1.4 s
1.9 s
2.4 s
2.8 s
3.3 s
3.8 s
Checks
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
6.3 MB transferred, 81 requests
FIX
6.3 MB transferred, 81 requests
Critical::
Page weighs 9.6 MB (6.3 MB transferred)
Warning::
Images are 3.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.8 MB
Info::
Fonts are 1.5 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.5 MB
Warning::
JavaScript is 732 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 732 KB
Info::
81 HTTP requests
Info::
Estimated 1.3 g CO2 per page load
6.3 MB / 2.4 MB budget
6.3 MB transferred
81 requests
1.3 g CO2 per page load
Images 3.8 MiB 61%
Fonts 1.5 MiB 24%
JavaScript 732.4 KiB 11%
CSS 180.0 KiB 3%
HTML 61.1 KiB 1%
Other 32.0 KiB 0%
Other 955 B 0%
Other 62 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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 (6.3 MiB of 6.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5230ms total JS execution
FIX
5230ms total JS execution
Warning::
https://www.unibas.ch/de: 2042ms CPU time
Warning::
https://consent.cookiebot.com/uc.js: 1117ms CPU time
Warning::
Unattributable: 1087ms CPU time
Warning::
https://maps.googleapis.com/maps/api/js?key=AIzaSy...: 438ms CPU time
Info::
https://www.unibas.ch/fallback/.resources/unibas-m...: 163ms CPU time
Warning::
Third-party scripts: 5230ms (100% of total)

Main Thread Breakdown

Script Evaluation 31% Other 30% Style & Layout 27% Parse HTML & CSS 6% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.unibas.ch/de2042ms20ms1ms3rd
https://consent.cookiebot.com/uc.js1117ms975ms13ms3rd
Unattributable1087ms22ms0ms3rd
https://maps.googleapis.com/maps/api/js?key=AIzaSyB62-K4dJ1ErUShZVqSKr7cLURN-3gE_gY&callback=initMapModule438ms280ms31ms3rd
https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/base-modules~2026-03-11-11-13-45-000~cache.js163ms113ms22ms3rd
https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/main~2026-03-11-11-13-45-000~cache.css111ms0ms0ms3rd
https://matomo-unibas.hosting.stucki.io/matomo.js71ms51ms19ms3rd
https://consent.cookiebot.com/6f9c7d5a-3446-48fe-a028-bfd8dc11db96/cc.js?renew=false&referer=www.unibas.ch&dnt=false&init=false70ms52ms1ms3rd
https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/enhanced-map-modules~2026-03-11-11-13-45-000~cache.js69ms46ms16ms3rd
https://code.jquery.com/jquery-3.7.1.min.js62ms40ms10ms3rd
D
Page Weight Inventory
Action
81 resources · 6.3 MB · 147 KB savings available
FIX
81 resources · 6.3 MB · 147 KB savings available
Warning::
Page weight 5.3 MB over 1MB target
Got: 6.3 MB Expected: ≤ 1 MB
Info::
~147 KB of savings available
Warning::
79 third-party resources (100% of weight)
Info::
8 resources over 200KB
81 resources · 6.3 MiB · 79 third-party 5.3 MiB over 1MB target
Image 61% · 3.8 MiB
Font 24% · 1.5 MiB
JavaScript 11% · 732.4 KiB
CSS 3% · 180.0 KiB
Document 1% · 74.9 KiB
Other 0% · 18.5 KiB

~147.2 KiB of savings available

Remove unused JavaScript: 147.2 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
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Warning::
https://www.unibas.ch/dam/jcr:42fad4e7-ec64-4cb1-8... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
42 images 3.8 MB
0 oversized -0 KB
31 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 Bundles
14 scripts, 147 KB unused
REVIEW
14 scripts, 147 KB unused
Warning::
https://maps.googleapis.com/maps/api/js?key=AIzaSy...: 63 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.unibas.ch/fallback/.resources/unibas-m...: 42 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.unibas.ch/fallback/.resources/unibas-m...: 42 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 147 KB
147 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://maps.googleapis.com/maps/api/js?key=AIzaSyB62-K4dJ1ErUShZVqSKr7cLURN-3gE_gY&callback=initMapModule100 KB63 KB (63%)✓3rd
https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/base-modules~2026-03-11-11-13-45-000~cache.js59 KB42 KB (72%)✓3rd
https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/base-modules~2026-03-11-11-13-45-000~cache.js0 KB42 KB (72%)✓3rd
https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/enhanced-modules~2026-03-11-11-13-45-000~cache.js25 KB—✓3rd
https://player.simplecast.com/assets/index.bb151a71.js421 KB—✓3rd
https://consent.cookiebot.com/6f9c7d5a-3446-48fe-a028-bfd8dc11db96/cc.js?renew=false&referer=www.unibas.ch&dnt=false&init=false0 KB—✓3rd
https://consent.cookiebot.com/uc.js27 KB—✓3rd
https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/enhanced-map-modules~2026-03-11-11-13-45-000~cache.js47 KB—✓3rd
https://code.jquery.com/jquery-3.7.1.min.js0 KB—✓3rd
https://matomo-unibas.hosting.stucki.io/matomo.js22 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

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
5 fonts (1505 KB)
PASS
5 fonts (1505 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

1505 KB total

Render-blocking

0

of 5

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 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s FCP 7.2 s LCP 24.3 shttps://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Bold.ttfPTSerif-Bold.ttf https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Bold.ttf — 192.0 KiB — 608 ms — font-display: swaphttps://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Italic.ttfPTSerif-Italic.ttf https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Italic.ttf — 227.3 KiB — 938 ms — font-display: swaphttps://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Regular.ttfPTSerif-Regular.ttf https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Regular.ttf — 211.0 KiB — 763 ms — font-display: swaphttps://www.unibas.ch/.resources/unibas-main/webresources/webfonts/Inter/Inter-VariableFont_opsz,wght.ttfInter-VariableFont_opsz... https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/Inter/Inter-VariableFont_opsz,wght.ttf — 855.1 KiB — 953 ms — font-display: swaphttps://cdn.simplecast.com/static/fonts/roboto-mono-v5-latin-regular.woff?-u69vo5roboto-mono-v5-latin-re... https://cdn.simplecast.com/static/fonts/roboto-mono-v5-latin-regular.woff?-u69vo5 — 19.7 KiB — 89 ms — font-display: swap
PTSerif-Bold.ttf ttf swap
Size 192 KB
Load time 608 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
PTSerif-Italic.ttf ttf swap
Size 227 KB
Load time 938 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
PTSerif-Regular.ttf ttf swap
Size 211 KB
Load time 763 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Inter-VariableFont_opsz... ttf swap
Size 855 KB
Load time 953 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
roboto-mono-v5-latin-re... woff swap
Size 20 KB
Load time 89 ms
Start 3.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~1194 KB and ~2388 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
6 hints, 0 missing preconnects
PASS
6 hints, 0 missing preconnects
Info::
Page uses 6 resource hint(s)

Current Resource Hints

preconnect
2
preload
4
dns-prefetch
—
prefetch
—

6 resource hints configured

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
81 requests over 5532ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s FCP 7.2 s LCP 24.3 shttps://unibas.ch// https://unibas.ch/ — 301 — 131 B — 633 ms — h2https://unibas.ch/de/de https://unibas.ch/de — 301 — 134 B — 159 ms — h2https://www.unibas.ch/dewww.unibas.ch/de https://www.unibas.ch/de — 200 — 59.0 KiB — 1.5 s — h2https://consent.cookiebot.com/uc.jsconsent.cookiebot.com/uc.js https://consent.cookiebot.com/uc.js — 200 — 27.0 KiB — 34 ms — h2https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Bold.ttfwww.unibas.ch/.resources/unibas-mai... https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Bold.ttf — 200 — 192.0 KiB — 608 ms — h2https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Italic.ttfwww.unibas.ch/.resources/unibas-mai... https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Italic.ttf — 200 — 227.3 KiB — 938 ms — h2https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Regular.ttfwww.unibas.ch/.resources/unibas-mai... https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/PTSerif/PTSerif-Regular.ttf — 200 — 211.0 KiB — 763 ms — h2https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/Inter/Inter-VariableFont_opsz,wght.ttfwww.unibas.ch/.resources/unibas-mai... https://www.unibas.ch/.resources/unibas-main/webresources/webfonts/Inter/Inter-VariableFont_opsz,wght.ttf — 200 — 855.1 KiB — 953 ms — h2https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/main~2026-03-11-11-13-45-000~cache.csswww.unibas.ch/fallback/.resources/u... https://www.unibas.ch/fallback/.resources/unibas-main/webresources/build/module/main~2026-03-11-11-13-45-000~cache.css — 200 — 146.7 KiB — 928 ms — h2https://code.jquery.com/jquery-3.7.1.min.jscode.jquery.com/jquery-3.7.1.min.js https://code.jquery.com/jquery-3.7.1.min.js — 200 — 30.0 KiB — 22 ms — h2https://www.unibas.ch/dam/jcr:cda88a07-7ef4-4666-ae01-ae3554d5e4ce/studieninteressierte.svgwww.unibas.ch/dam/jcr:cda88a07-7ef4... https://www.unibas.ch/dam/jcr:cda88a07-7ef4-4666-ae01-ae3554d5e4ce/studieninteressierte.svg — 200 — 2.8 KiB — 772 ms — h2https://consentcdn.cookiebot.com/consentconfig/6f9c7d5a-3446-48fe-a028-bfd8dc11db96/settings.jsonconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/6f9c7d5a-3446-48fe-a028-bfd8dc11db96/settings.json — 200 — 943 B — 28 ms — h2https://consentcdn.cookiebot.com/consentconfig/6f9c7d5a-3446-48fe-a028-bfd8dc11db96/unibas.ch/configuration.jsconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/6f9c7d5a-3446-48fe-a028-bfd8dc11db96/unibas.ch/configuration.js — 200 — 1013 B — 24 ms — h2https://consent.cookiebot.com/6f9c7d5a-3446-48fe-a028-bfd8dc11db96/cc.js?renew=false&referer=www.unibas.ch&dnt=false&init=falseconsent.cookiebot.com/6f9c7d5a-3446... https://consent.cookiebot.com/6f9c7d5a-3446-48fe-a028-bfd8dc11db96/cc.js?renew=false&referer=www.unibas.ch&dnt=false&init=false — 200 — 422 B — 180 ms — h2https://www.unibas.ch/dam/jcr:241d7138-9690-419e-89e2-5a04b7502375/dozierende.svgwww.unibas.ch/dam/jcr:241d7138-9690... https://www.unibas.ch/dam/jcr:241d7138-9690-419e-89e2-5a04b7502375/dozierende.svg — 200 — 3.3 KiB — 681 ms — h2https://www.unibas.ch/dam/jcr:87dd945b-d648-40e1-9c02-abacc12b08f0/Icon_Fundraising_Handshake_hover.svgwww.unibas.ch/dam/jcr:87dd945b-d648... https://www.unibas.ch/dam/jcr:87dd945b-d648-40e1-9c02-abacc12b08f0/Icon_Fundraising_Handshake_hover.svg — 200 — 5.5 KiB — 671 ms — h2https://www.unibas.ch/dam/jcr:93abfa0e-58d6-45ed-930a-de414ca40b13/uni-basel-logo.svgwww.unibas.ch/dam/jcr:93abfa0e-58d6... https://www.unibas.ch/dam/jcr:93abfa0e-58d6-45ed-930a-de414ca40b13/uni-basel-logo.svg — 200 — 18.6 KiB — 692 ms — h2https://www.unibas.ch/dam/jcr:070456a5-0108-4901-8c12-10be70d4d2fa/studierende.svgwww.unibas.ch/dam/jcr:070456a5-0108... https://www.unibas.ch/dam/jcr:070456a5-0108-4901-8c12-10be70d4d2fa/studierende.svg — 200 — 2.9 KiB — 674 ms — h2https://www.unibas.ch/dam/jcr:d298fc03-4d48-440f-80ab-5f038c8f2682/studierende-hover.svgwww.unibas.ch/dam/jcr:d298fc03-4d48... https://www.unibas.ch/dam/jcr:d298fc03-4d48-440f-80ab-5f038c8f2682/studierende-hover.svg — 200 — 2.8 KiB — 676 ms — h2https://www.unibas.ch/dam/jcr:cf4a2cbc-0fa3-49c1-aa37-8f88fee3ba9e/doktorierende.svgwww.unibas.ch/dam/jcr:cf4a2cbc-0fa3... https://www.unibas.ch/dam/jcr:cf4a2cbc-0fa3-49c1-aa37-8f88fee3ba9e/doktorierende.svg — 200 — 4.5 KiB — 684 ms — h2https://www.unibas.ch/dam/jcr:026ae6eb-57ff-4050-820d-19d781c34255/Icon_Fundraising_Handshake_weiss.svgwww.unibas.ch/dam/jcr:026ae6eb-57ff... https://www.unibas.ch/dam/jcr:026ae6eb-57ff-4050-820d-19d781c34255/Icon_Fundraising_Handshake_weiss.svg — 200 — 5.4 KiB — 688 ms — h2https://www.unibas.ch/dam/jcr:b0631511-9e10-427a-b19d-9a3a070c3536/studieninteressierte-hover.svgwww.unibas.ch/dam/jcr:b0631511-9e10... https://www.unibas.ch/dam/jcr:b0631511-9e10-427a-b19d-9a3a070c3536/studieninteressierte-hover.svg — 200 — 2.9 KiB — 690 ms — h2https://www.unibas.ch/dam/jcr:74a81f62-7b34-458e-a485-b861c4acb193/dozierende-hover.svgwww.unibas.ch/dam/jcr:74a81f62-7b34... https://www.unibas.ch/dam/jcr:74a81f62-7b34-458e-a485-b861c4acb193/dozierende-hover.svg — 200 — 3.3 KiB — 685 ms — h2https://www.unibas.ch/dam/jcr:72a715e8-1e9d-466b-8cb4-52798ee9b0fa/doktorierende-hover.svgwww.unibas.ch/dam/jcr:72a715e8-1e9d... https://www.unibas.ch/dam/jcr:72a715e8-1e9d-466b-8cb4-52798ee9b0fa/doktorierende-hover.svg — 200 — 4.5 KiB — 681 ms — h2https://consentcdn.cookiebot.com/sdk/bc-v4.min.htmlconsentcdn.cookiebot.com/sdk/bc-v4.... https://consentcdn.cookiebot.com/sdk/bc-v4.min.html — 200 — 811 B — 14 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 5230ms · 355KB · CHF83/mo
www.unibas.ch
Other
Costly
Execution 2042ms
Transfer 59 KB
Monthly Cost CHF32/mo
consent.cookiebot.com
Other
Costly
Execution 1117ms
Transfer 27 KB
Monthly Cost CHF18/mo
Unattributable
Other
Costly
Execution 1087ms
Transfer 0 KB
Monthly Cost CHF17/mo
maps.googleapis.com
Other
Costly
Execution 438ms
Transfer 100 KB
Unused 63%
Monthly Cost CHF7/mo
www.unibas.ch
Other
Optional
Execution 163ms
Transfer 0 KB
Unused 72%
Monthly Cost CHF3/mo
www.unibas.ch
Other
Optional
Execution 111ms
Transfer 147 KB
Monthly Cost CHF2/mo
matomo-unibas.hosting.stucki.io
Other
Optional
Execution 71ms
Transfer 22 KB
Monthly Cost CHF1/mo
consent.cookiebot.com
Other
Optional
Execution 70ms
Transfer 0 KB
Monthly Cost CHF1/mo
www.unibas.ch
Other
Optional
Execution 69ms
Transfer 0 KB
Monthly Cost CHF1/mo
code.jquery.com
Other
Optional
Execution 62ms
Transfer 0 KB
Monthly Cost CHF1/mo

These scripts may cost more than they're worth

  • www.unibas.ch adds 2042ms and costs ~CHF32/month
  • consent.cookiebot.com adds 1117ms and costs ~CHF18/month
  • Unattributable adds 1087ms and costs ~CHF17/month
  • maps.googleapis.com adds 438ms and costs ~CHF7/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.unibas.ch takes 2042ms 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

consent.cookiebot.com takes 1117ms 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

Unattributable takes 1087ms 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

maps.googleapis.com takes 438ms 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

63% of maps.googleapis.com'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.unibas.ch'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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