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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
4
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
63
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
82
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

4.41 s

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

9.87 s

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

0 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.

5.05 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.

9.87 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
7 PASS 4 REVIEW 4 FIX
F
Page Weight Budget
Action
3.2 MB transferred, 32 requests
FIX
3.2 MB transferred, 32 requests
Warning::
Page weighs 3.9 MB (3.2 MB transferred)
Warning::
Images are 2.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.8 MB
Info::
32 HTTP requests
Info::
Estimated 0.66 g CO2 per page load
3.2 MB / 2.4 MB budget
3.2 MB transferred
32 requests
0.66 g CO2 per page load
Images 2.8 MiB 88%
Fonts 168.2 KiB 5%
JavaScript 115.4 KiB 4%
CSS 68.0 KiB 2%
HTML 17.3 KiB 1%
Other 8.4 KiB 0%
Other 5.5 KiB 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

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 (3.2 MiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
32 resources · 3.2 MB · 34 KB savings available
FIX
32 resources · 3.2 MB · 34 KB savings available
Warning::
Page weight 2.2 MB over 1MB target
Got: 3.2 MB Expected: ≤ 1 MB
Warning::
31 third-party resources (100% of weight)
Info::
6 resources over 200KB
32 resources · 3.2 MiB · 31 third-party 2.2 MiB over 1MB target
Image 88% · 2.8 MiB
Font 5% · 168.2 KiB
JavaScript 4% · 119.0 KiB
CSS 2% · 68.0 KiB
Document 1% · 17.4 KiB
Other 0% · 4.8 KiB

~34.1 KiB of savings available

Remove unused JavaScript: 34.1 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
Image Optimization
Action
12 images, 0 KB saveable
REVIEW
12 images, 0 KB saveable
Warning::
https://www.kit.edu/img/seltenerd-verbindungen-tea... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kit.edu/admin/events/images/ajax/image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kit.edu/img/header-gruenderszene.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kit.edu/img/header-Studieren-KIT-2024.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kit.edu/img/hannover-messe-20260420-SG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kit.edu/img/kit-20221005-MH-01-001_rda... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kit.edu/img/2026_034_Colloquium-Fundam... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
12 images 2.8 MB
0 oversized -0 KB
12 legacy format
7 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

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

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

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

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

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

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
937ms total JS execution
REVIEW
937ms total JS execution
Warning::
https://static.scc.kit.edu/kit-2020/js/jquery-3.4....: 300ms CPU time
Warning::
https://www.kit.edu/: 288ms CPU time
Info::
https://static.scc.kit.edu/kit-2020/js/main.js: 177ms CPU time
Info::
Unattributable: 173ms CPU time
Warning::
Third-party scripts: 937ms (100% of total)

Main Thread Breakdown

Style & Layout 34% Script Evaluation 29% Other 26% Parse HTML & CSS 5% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://static.scc.kit.edu/kit-2020/js/jquery-3.4.1.min.js300ms256ms9ms3rd
https://www.kit.edu/288ms9ms1ms3rd
https://static.scc.kit.edu/kit-2020/js/main.js177ms9ms21ms3rd
Unattributable173ms4ms0ms3rd
B
JS Bundles
7 scripts, 34 KB unused
REVIEW
7 scripts, 34 KB unused
Warning::
https://static.scc.kit.edu/kit-2020/js/main.js: 34 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.scc.kit.edu/kit-2020/js/main.js: unminified — 15 KB could be saved
Warning::
https://static.scc.kit.edu/kit-2020/js/kit.js: unminified — 3 KB could be saved
Info::
Total unused JavaScript: 34 KB
34 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.scc.kit.edu/kit-2020/js/main.js59 KB34 KB (58%)✗3rd
https://static.scc.kit.edu/kit-2020/js/legacy-compat.js1 KB—✓3rd
https://static.scc.kit.edu/kit-2020/js/jquery-3.4.1.min.js30 KB—✓3rd
https://static.scc.kit.edu/kit-2020/js/kit.js8 KB—✗3rd
https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.js17 KB—✓3rd
https://www.kit.edu/38.js1 KB—✓3rd
https://www.kit.edu/feedback_2026.js4 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

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 (168 KB)
PASS
5 fonts (168 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

168 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 FCP 4.4 s LCP 9.9 shttps://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-300.woff2roboto-v20-latin-300.woff2 https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-300.woff2 — 15.7 KiB — 120 ms — font-display: swaphttps://static.scc.kit.edu/kit-2020/fonts/kit-icons/kit-icons.ttf?2haur7kit-icons.ttf https://static.scc.kit.edu/kit-2020/fonts/kit-icons/kit-icons.ttf?2haur7 — 10.9 KiB — 177 ms — font-display: swaphttps://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-regular.woff2roboto-v20-latin-regula... https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-regular.woff2 — 15.4 KiB — 122 ms — font-display: swaphttps://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-700.woff2roboto-v20-latin-700.woff2 https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-700.woff2 — 15.5 KiB — 177 ms — font-display: swaphttps://static.scc.kit.edu/kit-2020/fontawesome/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://static.scc.kit.edu/kit-2020/fontawesome/webfonts/fa-solid-900.woff2 — 110.6 KiB — 176 ms — font-display: swap
roboto-v20-latin-300.woff2 woff2 swap
Size 16 KB
Load time 120 ms
Start 489 ms
Risk FOUT — text flashes from fallback to web font
kit-icons.ttf ttf swap
Size 11 KB
Load time 177 ms
Start 489 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
roboto-v20-latin-regula... woff2 swap
Size 15 KB
Load time 122 ms
Start 490 ms
Risk FOUT — text flashes from fallback to web font
roboto-v20-latin-700.woff2 woff2 swap
Size 16 KB
Load time 177 ms
Start 490 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 111 KB
Load time 176 ms
Start 490 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~59 KB and ~118 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
32 requests over 1475ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 4.4 s LCP 9.9 shttps://kit.edu// https://kit.edu/ — 301 — 94 B — 95 ms — h2https://www.kit.edu/www.kit.edu/ https://www.kit.edu/ — 200 — 17.3 KiB — 73 ms — h2https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.cssstatic.scc.kit.edu/fancybox/dist/jq... https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.css — 200 — 3.4 KiB — 143 ms — h2https://static.scc.kit.edu/kit-2020/fontawesome/css/all.min.cssstatic.scc.kit.edu/kit-2020/fontawe... https://static.scc.kit.edu/kit-2020/fontawesome/css/all.min.css — 200 — 23.9 KiB — 195 ms — h2https://www.kit.edu/31.phpwww.kit.edu/31.php https://www.kit.edu/31.php — 200 — 2.7 KiB — 36 ms — h2https://www.kit.edu/7.php.csswww.kit.edu/7.php.css https://www.kit.edu/7.php.css — 200 — 38.1 KiB — 121 ms — h2https://static.scc.kit.edu/kit-2020/js/legacy-compat.jsstatic.scc.kit.edu/kit-2020/js/lega... https://static.scc.kit.edu/kit-2020/js/legacy-compat.js — 200 — 1.2 KiB — 140 ms — h2https://static.scc.kit.edu/kit-2020/js/jquery-3.4.1.min.jsstatic.scc.kit.edu/kit-2020/js/jque... https://static.scc.kit.edu/kit-2020/js/jquery-3.4.1.min.js — 200 — 29.7 KiB — 222 ms — h2https://static.scc.kit.edu/kit-2020/js/main.jsstatic.scc.kit.edu/kit-2020/js/main... https://static.scc.kit.edu/kit-2020/js/main.js — 200 — 59.3 KiB — 219 ms — h2https://static.scc.kit.edu/kit-2020/js/kit.jsstatic.scc.kit.edu/kit-2020/js/kit.... https://static.scc.kit.edu/kit-2020/js/kit.js — 200 — 8.0 KiB — 163 ms — h2https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.jsstatic.scc.kit.edu/fancybox/dist/jq... https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.js — 200 — 16.5 KiB — 168 ms — h2https://www.kit.edu/38.jswww.kit.edu/38.js https://www.kit.edu/38.js — 200 — 778 B — 32 ms — h2https://www.kit.edu/img/header-gruenderszene.jpgwww.kit.edu/img/header-gruenderszen... https://www.kit.edu/img/header-gruenderszene.jpg — 200 — 120.0 KiB — 139 ms — h2https://www.kit.edu/img/header-Studieren-KIT-2024.jpgwww.kit.edu/img/header-Studieren-KI... https://www.kit.edu/img/header-Studieren-KIT-2024.jpg — 200 — 243.4 KiB — 117 ms — h2https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-300.woff2static.scc.kit.edu/kit-2020/fonts/r... https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-300.woff2 — 200 — 15.7 KiB — 120 ms — h2https://static.scc.kit.edu/kit-2020/fonts/kit-icons/kit-icons.ttf?2haur7static.scc.kit.edu/kit-2020/fonts/k... https://static.scc.kit.edu/kit-2020/fonts/kit-icons/kit-icons.ttf?2haur7 — 200 — 10.9 KiB — 177 ms — h2https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-regular.woff2static.scc.kit.edu/kit-2020/fonts/r... https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-regular.woff2 — 200 — 15.4 KiB — 122 ms — h2https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-700.woff2static.scc.kit.edu/kit-2020/fonts/r... https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-700.woff2 — 200 — 15.5 KiB — 177 ms — h2https://static.scc.kit.edu/kit-2020/fontawesome/webfonts/fa-solid-900.woff2static.scc.kit.edu/kit-2020/fontawe... https://static.scc.kit.edu/kit-2020/fontawesome/webfonts/fa-solid-900.woff2 — 200 — 110.6 KiB — 176 ms — h2https://www.kit.edu/feedback_2026.jswww.kit.edu/feedback_2026.js https://www.kit.edu/feedback_2026.js — 200 — 3.6 KiB — 31 ms — h2https://www.kit.edu/feedback_2026_locale_de.jsonwww.kit.edu/feedback_2026_locale_de... https://www.kit.edu/feedback_2026_locale_de.json — 200 — 4.8 KiB — 30 ms — h2https://www.kit.edu/img/intern/kit-1920-700.jpgwww.kit.edu/img/intern/kit-1920-700... https://www.kit.edu/img/intern/kit-1920-700.jpg — 200 — 712.6 KiB — 65 ms — h2https://www.kit.edu/img/intern/favicon.icowww.kit.edu/img/intern/favicon.ico https://www.kit.edu/img/intern/favicon.ico — 200 — 5.4 KiB — 44 ms — h2https://www.kit.edu/img/hannover-messe-20260420-SG-01-019_rdax_98s.jpgwww.kit.edu/img/hannover-messe-2026... https://www.kit.edu/img/hannover-messe-20260420-SG-01-019_rdax_98s.jpg — 200 — 235.7 KiB — 73 ms — h2https://www.kit.edu/img/kit-20221005-MH-01-001_rdax_98s.jpgwww.kit.edu/img/kit-20221005-MH-01-... https://www.kit.edu/img/kit-20221005-MH-01-001_rdax_98s.jpg — 200 — 161.0 KiB — 91 ms — h2https://www.kit.edu/img/2026_034_Colloquium-Fundamentale_rdax_1024x576_98s.jpgwww.kit.edu/img/2026_034_Colloquium... https://www.kit.edu/img/2026_034_Colloquium-Fundamentale_rdax_1024x576_98s.jpg — 200 — 244.5 KiB — 96 ms — h2https://www.kit.edu/img/seltenerd-verbindungen-teaser_rdax_98s.jpgwww.kit.edu/img/seltenerd-verbindun... https://www.kit.edu/img/seltenerd-verbindungen-teaser_rdax_98s.jpg — 200 — 27.1 KiB — 96 ms — h2https://www.kit.edu/img/hannover-messe_2026.jpgwww.kit.edu/img/hannover-messe_2026... https://www.kit.edu/img/hannover-messe_2026.jpg — 200 — 601.5 KiB — 66 ms — h2https://www.kit.edu/img/lookKIT_202601.jpgwww.kit.edu/img/lookKIT_202601.jpg https://www.kit.edu/img/lookKIT_202601.jpg — 200 — 124.8 KiB — 98 ms — h2https://www.kit.edu/img/kuenstliche-intelligenz-20251113-AB-01-009.jpgwww.kit.edu/img/kuenstliche-intelli... https://www.kit.edu/img/kuenstliche-intelligenz-20251113-AB-01-009.jpg — 200 — 143.3 KiB — 33 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 4.4 s LCP 9.9 shttps://kit.edu// https://kit.edu/ — 301 — 94 B — 95 ms — h2https://www.kit.edu/www.kit.edu/ https://www.kit.edu/ — 200 — 17.3 KiB — 73 ms — h2https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.cssstatic.scc.kit.edu/fancybox/dist/jq... https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.css — 200 — 3.4 KiB — 143 ms — h2https://static.scc.kit.edu/kit-2020/fontawesome/css/all.min.cssstatic.scc.kit.edu/kit-2020/fontawe... https://static.scc.kit.edu/kit-2020/fontawesome/css/all.min.css — 200 — 23.9 KiB — 195 ms — h2https://www.kit.edu/31.phpwww.kit.edu/31.php https://www.kit.edu/31.php — 200 — 2.7 KiB — 36 ms — h2https://www.kit.edu/7.php.csswww.kit.edu/7.php.css https://www.kit.edu/7.php.css — 200 — 38.1 KiB — 121 ms — h2https://static.scc.kit.edu/kit-2020/js/legacy-compat.jsstatic.scc.kit.edu/kit-2020/js/lega... https://static.scc.kit.edu/kit-2020/js/legacy-compat.js — 200 — 1.2 KiB — 140 ms — h2https://static.scc.kit.edu/kit-2020/js/jquery-3.4.1.min.jsstatic.scc.kit.edu/kit-2020/js/jque... https://static.scc.kit.edu/kit-2020/js/jquery-3.4.1.min.js — 200 — 29.7 KiB — 222 ms — h2https://static.scc.kit.edu/kit-2020/js/main.jsstatic.scc.kit.edu/kit-2020/js/main... https://static.scc.kit.edu/kit-2020/js/main.js — 200 — 59.3 KiB — 219 ms — h2https://static.scc.kit.edu/kit-2020/js/kit.jsstatic.scc.kit.edu/kit-2020/js/kit.... https://static.scc.kit.edu/kit-2020/js/kit.js — 200 — 8.0 KiB — 163 ms — h2https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.jsstatic.scc.kit.edu/fancybox/dist/jq... https://static.scc.kit.edu/fancybox/dist/jquery.fancybox.min.js — 200 — 16.5 KiB — 168 ms — h2https://www.kit.edu/38.jswww.kit.edu/38.js https://www.kit.edu/38.js — 200 — 778 B — 32 ms — h2https://www.kit.edu/img/header-gruenderszene.jpgwww.kit.edu/img/header-gruenderszen... https://www.kit.edu/img/header-gruenderszene.jpg — 200 — 120.0 KiB — 139 ms — h2https://www.kit.edu/img/header-Studieren-KIT-2024.jpgwww.kit.edu/img/header-Studieren-KI... https://www.kit.edu/img/header-Studieren-KIT-2024.jpg — 200 — 243.4 KiB — 117 ms — h2https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-300.woff2static.scc.kit.edu/kit-2020/fonts/r... https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-300.woff2 — 200 — 15.7 KiB — 120 ms — h2https://static.scc.kit.edu/kit-2020/fonts/kit-icons/kit-icons.ttf?2haur7static.scc.kit.edu/kit-2020/fonts/k... https://static.scc.kit.edu/kit-2020/fonts/kit-icons/kit-icons.ttf?2haur7 — 200 — 10.9 KiB — 177 ms — h2https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-regular.woff2static.scc.kit.edu/kit-2020/fonts/r... https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-regular.woff2 — 200 — 15.4 KiB — 122 ms — h2https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-700.woff2static.scc.kit.edu/kit-2020/fonts/r... https://static.scc.kit.edu/kit-2020/fonts/roboto/roboto-v20-latin-700.woff2 — 200 — 15.5 KiB — 177 ms — h2https://static.scc.kit.edu/kit-2020/fontawesome/webfonts/fa-solid-900.woff2static.scc.kit.edu/kit-2020/fontawe... https://static.scc.kit.edu/kit-2020/fontawesome/webfonts/fa-solid-900.woff2 — 200 — 110.6 KiB — 176 ms — h2https://www.kit.edu/feedback_2026.jswww.kit.edu/feedback_2026.js https://www.kit.edu/feedback_2026.js — 200 — 3.6 KiB — 31 ms — h2https://www.kit.edu/feedback_2026_locale_de.jsonwww.kit.edu/feedback_2026_locale_de... https://www.kit.edu/feedback_2026_locale_de.json — 200 — 4.8 KiB — 30 ms — h2https://www.kit.edu/img/intern/kit-1920-700.jpgwww.kit.edu/img/intern/kit-1920-700... https://www.kit.edu/img/intern/kit-1920-700.jpg — 200 — 712.6 KiB — 65 ms — h2https://www.kit.edu/img/intern/favicon.icowww.kit.edu/img/intern/favicon.ico https://www.kit.edu/img/intern/favicon.ico — 200 — 5.4 KiB — 44 ms — h2https://www.kit.edu/img/hannover-messe-20260420-SG-01-019_rdax_98s.jpgwww.kit.edu/img/hannover-messe-2026... https://www.kit.edu/img/hannover-messe-20260420-SG-01-019_rdax_98s.jpg — 200 — 235.7 KiB — 73 ms — h2https://www.kit.edu/img/kit-20221005-MH-01-001_rdax_98s.jpgwww.kit.edu/img/kit-20221005-MH-01-... https://www.kit.edu/img/kit-20221005-MH-01-001_rdax_98s.jpg — 200 — 161.0 KiB — 91 ms — h2https://www.kit.edu/img/2026_034_Colloquium-Fundamentale_rdax_1024x576_98s.jpgwww.kit.edu/img/2026_034_Colloquium... https://www.kit.edu/img/2026_034_Colloquium-Fundamentale_rdax_1024x576_98s.jpg — 200 — 244.5 KiB — 96 ms — h2https://www.kit.edu/img/seltenerd-verbindungen-teaser_rdax_98s.jpgwww.kit.edu/img/seltenerd-verbindun... https://www.kit.edu/img/seltenerd-verbindungen-teaser_rdax_98s.jpg — 200 — 27.1 KiB — 96 ms — h2https://www.kit.edu/img/hannover-messe_2026.jpgwww.kit.edu/img/hannover-messe_2026... https://www.kit.edu/img/hannover-messe_2026.jpg — 200 — 601.5 KiB — 66 ms — h2https://www.kit.edu/img/lookKIT_202601.jpgwww.kit.edu/img/lookKIT_202601.jpg https://www.kit.edu/img/lookKIT_202601.jpg — 200 — 124.8 KiB — 98 ms — h2https://www.kit.edu/img/kuenstliche-intelligenz-20251113-AB-01-009.jpgwww.kit.edu/img/kuenstliche-intelli... https://www.kit.edu/img/kuenstliche-intelligenz-20251113-AB-01-009.jpg — 200 — 143.3 KiB — 33 ms — h2https://www.kit.edu/img/Forschen/studieren-20110107-CS-03-173.jpgwww.kit.edu/img/Forschen/studieren-... https://www.kit.edu/img/Forschen/studieren-20110107-CS-03-173.jpg — 200 — 224.3 KiB — 36 ms — h2https://www.kit.edu/admin/events/images/ajax/image.php?ev_id=47512&format=widgetwww.kit.edu/admin/events/images/aja... https://www.kit.edu/admin/events/images/ajax/image.php?ev_id=47512&format=widget — 200 — 24.2 KiB — 48 ms — h2
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 937ms · 106KB · €10/mo
static.scc.kit.edu
Other
Costly
Execution 300ms
Transfer 30 KB
Monthly Cost €3/mo
www.kit.edu
Other
Costly
Execution 288ms
Transfer 17 KB
Monthly Cost €3/mo
static.scc.kit.edu
Other
Optional
Execution 177ms
Transfer 59 KB
Unused 58%
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 173ms
Transfer 0 KB
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • static.scc.kit.edu adds 300ms and costs ~€3/month
  • www.kit.edu adds 288ms and costs ~€3/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

static.scc.kit.edu takes 300ms 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.kit.edu takes 288ms 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

58% of static.scc.kit.edu'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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