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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
73
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
85
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.

1.78 s

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

2.32 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.

3.95 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.

2.32 s

Page Load Progression

621 ms
1.2 s
1.9 s
2.5 s
3.1 s
3.7 s
4.3 s
5.0 s
Checks
15
6 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
6.2 MB transferred, 62 requests
FIX
6.2 MB transferred, 62 requests
Critical::
Page weighs 6.7 MB (6.2 MB transferred)
Warning::
Images are 4.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.7 MB
Warning::
JavaScript is 863 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 863 KB
Info::
Fonts are 542 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 542 KB
Info::
62 HTTP requests
Info::
Estimated 1.3 g CO2 per page load
6.2 MB / 2.4 MB budget
6.2 MB transferred
62 requests
1.3 g CO2 per page load
Images 4.7 MiB 76%
JavaScript 863.0 KiB 14%
Fonts 541.9 KiB 9%
CSS 80.2 KiB 1%
HTML 15.9 KiB 0%
Other 11.6 KiB 0%
Other 59 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

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

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 (6.2 MiB of 6.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
8 scripts, 336 KB unused
FIX
8 scripts, 336 KB unused
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a...: 306 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a...: 29 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a...: unminified — 59 KB could be saved
Info::
Total unused JavaScript: 336 KB
336 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/main-0c2cc12a.js424 KB306 KB (72%)✓3rd
https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/011__in2cookiemodal-3fddabd7.js63 KB29 KB (46%)✓3rd
https://www.uni-ulm.de/typo3temp/assets/compressed/merged-272f9772ac9f3572a81a917ab1e46777.js?1775726340259 KB—✓3rd
https://www.uni-ulm.de/typo3temp/assets/js/7f6f4007061a3385249e7e32f51dfafe.js?17757263371 KB—✓3rd
https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/Vendor/require.js?177572589285 KB—✗3rd
https://webanalyse.uni-ulm.de/matomo.js21 KB—✓3rd
https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/main.js0 KB—✓3rd
https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/010__in2cookiemodal-config-3bd08218.js10 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

D
Page Weight Inventory
Action
62 resources · 6.2 MB · 336 KB savings available
FIX
62 resources · 6.2 MB · 336 KB savings available
Warning::
Page weight 5.2 MB over 1MB target
Got: 6.2 MB Expected: ≤ 1 MB
Info::
~336 KB of savings available
Warning::
61 third-party resources (100% of weight)
Info::
10 resources over 200KB
62 resources · 6.2 MiB · 61 third-party 5.2 MiB over 1MB target
Image 76% · 4.7 MiB
JavaScript 14% · 863.0 KiB
Font 9% · 541.9 KiB
CSS 1% · 80.2 KiB
Document 0% · 15.9 KiB
Other 0% · 147 B

~335.5 KiB of savings available

Remove unused JavaScript: 335.5 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
39 images, 0 KB saveable
REVIEW
39 images, 0 KB saveable
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uni-ulm.de/_assets/a92153751098915699a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
39 images 4.7 MB
0 oversized -0 KB
25 legacy format
11 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

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

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+
JS Execution Cost
436ms total JS execution
PASS
436ms total JS execution
Info::
https://www.uni-ulm.de/: 169ms CPU time
Info::
Unattributable: 166ms CPU time
Info::
https://www.uni-ulm.de/_assets/a92153751098915699a...: 101ms CPU time
Warning::
Third-party scripts: 436ms (100% of total)

Main Thread Breakdown

Other 36% Style & Layout 23% Script Evaluation 23% Rendering 7% Script Parsing & Compilation 7% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.uni-ulm.de/169ms2ms1ms3rd
Unattributable166ms5ms0ms3rd
https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/Vendor/require.js?1775725892101ms74ms3ms3rd
A+
Font Loading
4 fonts (542 KB)
PASS
4 fonts (542 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

542 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 4.0 s FCP 1.8 s LCP 2.3 shttps://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Fonts/FiraSans-Regular.woff2FiraSans-Regular.woff2 https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Fonts/FiraSans-Regular.woff2 — 126.3 KiB — 2.3 s — font-display: swaphttps://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Fonts/FiraSans-Bold.woff2FiraSans-Bold.woff2 https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Fonts/FiraSans-Bold.woff2 — 137.3 KiB — 2.3 s — font-display: swaphttps://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Fonts/FiraSans-BoldItalic.woff2FiraSans-BoldItalic.woff2 https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Fonts/FiraSans-BoldItalic.woff2 — 145.1 KiB — 2.3 s — font-display: swaphttps://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Fonts/FiraSans-Italic.woff2FiraSans-Italic.woff2 https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Fonts/FiraSans-Italic.woff2 — 133.3 KiB — 2.3 s — font-display: swap
FiraSans-Regular.woff2 woff2 swap
Size 126 KB
Load time 2.3 s
Start 1.9 s
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
FiraSans-Bold.woff2 woff2 swap
Size 137 KB
Load time 2.3 s
Start 1.9 s
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
FiraSans-BoldItalic.woff2 woff2 swap
Size 145 KB
Load time 2.3 s
Start 1.9 s
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
FiraSans-Italic.woff2 woff2 swap
Size 133 KB
Load time 2.3 s
Start 1.9 s
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 ~271 KB and ~542 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
62 requests over 4890ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 1.8 s LCP 2.3 shttps://uni-ulm.de// https://uni-ulm.de/ — 301 — 88 B — 640 ms — h2https://www.uni-ulm.de/www.uni-ulm.de/ https://www.uni-ulm.de/ — 200 — 15.9 KiB — 671 ms — h2https://www.uni-ulm.de/typo3temp/assets/compressed/basic-c96adb4833f6e6e3db4efc5978bdb0d5.css.gz?1775726340www.uni-ulm.de/typo3temp/assets/com... https://www.uni-ulm.de/typo3temp/assets/compressed/basic-c96adb4833f6e6e3db4efc5978bdb0d5.css.gz?1775726340 — 200 — 57.7 KiB — 338 ms — h2https://www.uni-ulm.de/typo3temp/assets/compressed/fontawesome-43e1c3ac65e8eb0f4fb64c81487c5949.css.gz?1775726340www.uni-ulm.de/typo3temp/assets/com... https://www.uni-ulm.de/typo3temp/assets/compressed/fontawesome-43e1c3ac65e8eb0f4fb64c81487c5949.css.gz?1775726340 — 200 — 11.9 KiB — 505 ms — h2https://www.uni-ulm.de/typo3temp/assets/compressed/academicons-778195a43ecae33170ed2155283a9263.css.gz?1775726340www.uni-ulm.de/typo3temp/assets/com... https://www.uni-ulm.de/typo3temp/assets/compressed/academicons-778195a43ecae33170ed2155283a9263.css.gz?1775726340 — 200 — 1.5 KiB — 505 ms — h2https://www.uni-ulm.de/typo3temp/assets/compressed/ods_osm-2a3f1cd3eddbd66028896e9773d3e56c.css.gz?1775726340www.uni-ulm.de/typo3temp/assets/com... https://www.uni-ulm.de/typo3temp/assets/compressed/ods_osm-2a3f1cd3eddbd66028896e9773d3e56c.css.gz?1775726340 — 200 — 504 B — 505 ms — h2https://www.uni-ulm.de/typo3temp/assets/compressed/style-3f19830b8872601e318a6ebfd7bada6f.css.gz?1775726340www.uni-ulm.de/typo3temp/assets/com... https://www.uni-ulm.de/typo3temp/assets/compressed/style-3f19830b8872601e318a6ebfd7bada6f.css.gz?1775726340 — 200 — 4.3 KiB — 505 ms — h2https://www.uni-ulm.de/_assets/f6ef6adaf5c92bf687a31a3adbcb0f7b/Css/news-basic.css?1775725893www.uni-ulm.de/_assets/f6ef6adaf5c9... https://www.uni-ulm.de/_assets/f6ef6adaf5c92bf687a31a3adbcb0f7b/Css/news-basic.css?1775725893 — 200 — 3.3 KiB — 509 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/logo-uni-ulm.svg?1775725891www.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/logo-uni-ulm.svg?1775725891 — 200 — 13.1 KiB — 506 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/share.svg?1775725891www.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/share.svg?1775725891 — 200 — 570 B — 508 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/facebook.svg?1775725891www.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/facebook.svg?1775725891 — 200 — 294 B — 168 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/mail.svg?1775725891www.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/mail.svg?1775725891 — 200 — 749 B — 168 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/globe-white.svg?1775725891www.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/globe-white.svg?1775725891 — 200 — 1.4 KiB — 522 ms — h2https://www.uni-ulm.de/typo3temp/assets/compressed/merged-272f9772ac9f3572a81a917ab1e46777.js?1775726340www.uni-ulm.de/typo3temp/assets/com... https://www.uni-ulm.de/typo3temp/assets/compressed/merged-272f9772ac9f3572a81a917ab1e46777.js?1775726340 — 200 — 258.7 KiB — 513 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/print.svg?1775725891www.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/print.svg?1775725891 — 200 — 1002 B — 522 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/arrow-ghost-top.svg?1775725891www.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/arrow-ghost-top.svg?1775725891 — 200 — 511 B — 522 ms — h2https://www.uni-ulm.de/fileadmin/img/slider/Slider_2026/Semestereroeffnung.jpgwww.uni-ulm.de/fileadmin/img/slider... https://www.uni-ulm.de/fileadmin/img/slider/Slider_2026/Semestereroeffnung.jpg — 200 — 362.6 KiB — 845 ms — h2https://www.uni-ulm.de/fileadmin/img/slider/Slider_2026/SleepLoop_Schlafstimulation_idw.jpgwww.uni-ulm.de/fileadmin/img/slider... https://www.uni-ulm.de/fileadmin/img/slider/Slider_2026/SleepLoop_Schlafstimulation_idw.jpg — 200 — 325.8 KiB — 1.0 s — h2https://www.uni-ulm.de/fileadmin/img/slider/Slider_Studium/Img_046.jpgwww.uni-ulm.de/fileadmin/img/slider... https://www.uni-ulm.de/fileadmin/img/slider/Slider_Studium/Img_046.jpg — 200 — 146.7 KiB — 1.2 s — 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https://webanalyse.uni-ulm.de/matomo.php?action_name=Uni%20Ulm%20-%20Forschung%2C%20Studium%2C%20Wissenstransfer%20-%20Universit%C3%A4t%20Ulm&idsite=1&rec=1&r=211235&h=0&m=53&s=38&url=https%3A%2F%2Fwww.uni-ulm.de%2F&_id=&_idn=1&send_image=0&_refts=0&pv_id=HMP91E&pf_net=505&pf_srv=168&pf_tfr=2&pf_dm1=1090&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not-A.Brand%22%2C%22version%22%3A%2224.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22146.0.7680.164%22%7D%5D%2C%22mobile%22%3Afalse%2C%22model%22%3A%22%22%2C%22platform%22%3A%22macOS%22%2C%22platformVersion%22%3A%2210.15.7%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=800x600 — 204 — 59 B — 505 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/main.jswww.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/main.js — 200 — 102 B — 171 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/main-0c2cc12a.jswww.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/main-0c2cc12a.js — 200 — 423.8 KiB — 203 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/Lightbox/loading.gifwww.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/Lightbox/loading.gif — 200 — 8.3 KiB — 173 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/Lightbox/close.pngwww.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/Lightbox/close.png — 200 — 314 B — 173 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/download-white.svgwww.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/Icons/download-white.svg — 200 — 610 B — 169 ms — h2data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==data:image/gif;base64,R0lGODlhAQABA... data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw== — 200 — 0 B — 0 ms — datahttps://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/010__in2cookiemodal-config-3bd08218.jswww.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/010__in2cookiemodal-config-3bd08218.js — 200 — 10.3 KiB — 169 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/011__in2cookiemodal-3fddabd7.jswww.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/JavaScripts/011__in2cookiemodal-3fddabd7.js — 200 — 63.1 KiB — 172 ms — h2https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/favicon.icowww.uni-ulm.de/_assets/a92153751098... https://www.uni-ulm.de/_assets/a92153751098915699a1afa17e77f864/Images/favicon.ico — 200 — 11.5 KiB — 173 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 436ms · 101KB · €5/mo
www.uni-ulm.de
Other
Optional
Execution 169ms
Transfer 16 KB
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 166ms
Transfer 0 KB
Monthly Cost €2/mo
www.uni-ulm.de
Other
Optional
Execution 101ms
Transfer 85 KB
Monthly Cost €1/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

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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