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https://univie.ac.at

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
1
REVIEW
4
PASS
10
INFO
2

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

Mobile Desktop
79
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.

2.00 s

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

3.95 s

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

287 ms

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

0.004

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

3.28 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

3.95 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
10 PASS 4 REVIEW 1 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 (972.2 KiB of 972.5 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
B
Image Optimization
6 images, 0 KB saveable
REVIEW
6 images, 0 KB saveable
Info::
All images are well-optimized
6 images 614 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1741ms total JS execution
REVIEW
1741ms total JS execution
Warning::
https://www.univie.ac.at/: 572ms CPU time
Warning::
https://www.univie.ac.at/typo3temp/assets/compress...: 478ms CPU time
Warning::
Unattributable: 291ms CPU time
Info::
https://www.univie.ac.at/typo3temp/assets/cookieco...: 173ms CPU time
Info::
https://www.univie.ac.at/_assets/12d6b27de3745b4c3...: 141ms CPU time
Warning::
Third-party scripts: 1741ms (100% of total)

Main Thread Breakdown

Script Evaluation 35% Other 29% Style & Layout 20% Parse HTML & CSS 8% Script Parsing & Compilation 5% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.univie.ac.at/572ms16ms1ms3rd
https://www.univie.ac.at/typo3temp/assets/compressed/main-e4e951d7d2f137e3c4eb47dc29a9fde1.js?1776416437478ms414ms1ms3rd
Unattributable291ms10ms0ms3rd
https://www.univie.ac.at/typo3temp/assets/cookieconfig06ada6b9f0c9ad8076c9fed4d76cd4283.js?1776756190173ms92ms9ms3rd
https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/JavaScript/libs/splide.min.js?1776333644141ms21ms6ms3rd
https://www.univie.ac.at/_assets/2076be5e7c25c5348e8257623059b612/JavaScript/leaflet.min.js?177633364885ms52ms32ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
max-age=0
REVIEW
max-age=0
Info::
Cache-Control header is set
Got: max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0

DirectiveValueMeaning
max-age0Cache for 0 seconds
A
Page Weight Budget
973 KB transferred, 30 requests
PASS
973 KB transferred, 30 requests
Info::
Page weighs 1.9 MB (973 KB transferred)
Info::
30 HTTP requests
Info::
Estimated 0.20 g CO2 per page load
973 KB / 2.4 MB budget
973 KB transferred
30 requests
0.20 g CO2 per page load
Images 614.4 KiB 63%
Fonts 152.7 KiB 16%
JavaScript 143.6 KiB 15%
HTML 34.1 KiB 4%
CSS 25.3 KiB 3%
Other 1.9 KiB 0%
Other 547 B 0%
0 2.4 MB 4.9 MB
Under budget
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
7 fonts (153 KB)
PASS
7 fonts (153 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

153 KB total

Render-blocking

0

of 7

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 2.0 s LCP 4.0 shttps://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-regular.woff2inter-v18-latin-regular... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-regular.woff2 — 23.5 KiB — 39 ms — font-display: swaphttps://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-italic.woff2inter-v18-latin-italic.... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-italic.woff2 — 24.8 KiB — 63 ms — font-display: swaphttps://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-600.woff2inter-v18-latin-600.woff2 https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-600.woff2 — 24.1 KiB — 82 ms — font-display: swaphttps://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-600italic.woff2inter-v18-latin-600ital... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-600italic.woff2 — 25.6 KiB — 80 ms — font-display: swaphttps://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/SourceSerif4/source-serif-4-v8-latin-regular.woff2source-serif-4-v8-latin... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/SourceSerif4/source-serif-4-v8-latin-regular.woff2 — 19.9 KiB — 79 ms — font-display: swaphttps://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/SourceSerif4/source-serif-4-v8-latin-italic.woff2source-serif-4-v8-latin... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/SourceSerif4/source-serif-4-v8-latin-italic.woff2 — 20.0 KiB — 79 ms — font-display: swaphttps://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Icons/icons.woff2icons.woff2 https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Icons/icons.woff2 — 14.7 KiB — 79 ms — font-display: swap
inter-v18-latin-regular... woff2 swap
Size 23 KB
Load time 39 ms
Start 214 ms
Risk FOUT — text flashes from fallback to web font
inter-v18-latin-italic.... woff2 swap
Size 25 KB
Load time 63 ms
Start 222 ms
Risk FOUT — text flashes from fallback to web font
inter-v18-latin-600.woff2 woff2 swap
Size 24 KB
Load time 82 ms
Start 223 ms
Risk FOUT — text flashes from fallback to web font
inter-v18-latin-600ital... woff2 swap
Size 26 KB
Load time 80 ms
Start 223 ms
Risk FOUT — text flashes from fallback to web font
source-serif-4-v8-latin... woff2 swap
Size 20 KB
Load time 79 ms
Start 224 ms
Risk FOUT — text flashes from fallback to web font
source-serif-4-v8-latin... woff2 swap
Size 20 KB
Load time 79 ms
Start 225 ms
Risk FOUT — text flashes from fallback to web font
icons.woff2 woff2 swap
Size 15 KB
Load time 79 ms
Start 225 ms
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)
A+
JS Bundles
11 scripts, 40 KB unused
PASS
11 scripts, 40 KB unused
Warning::
https://www.univie.ac.at/_assets/2076be5e7c25c5348...: 40 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 40 KB
40 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.univie.ac.at/_assets/2076be5e7c25c5348e8257623059b612/JavaScript/leaflet.min.js?177633364848 KB40 KB (83%)✓3rd
https://www.univie.ac.at/typo3temp/assets/compressed/merged-6ac95fefb81a42397b404b9d19266665-f3875072ca2d93c26d803fb7532c09fb.js?17764164371 KB—✓3rd
https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/JavaScript/libs/splide.min.js?177633364413 KB—✓3rd
https://www.univie.ac.at/_assets/2076be5e7c25c5348e8257623059b612/JavaScript/OpenStreetMap2.min.js?17763336483 KB—✓3rd
https://www.univie.ac.at/typo3temp/assets/compressed/manifest-e953c744e23f4e0bd5550d0514b93058.js?17764164371 KB—✓3rd
https://www.univie.ac.at/typo3temp/assets/compressed/vendor-47339f445dd7e983894c54641db10bad.js?177641643721 KB—✓3rd
https://www.univie.ac.at/typo3temp/assets/compressed/main-e4e951d7d2f137e3c4eb47dc29a9fde1.js?17764164371 KB—✓3rd
https://www.univie.ac.at/typo3temp/assets/compressed/iframemanager-b4181be083422a4f9e614b971d3c635e.js?17764164377 KB—✗3rd
https://www.univie.ac.at/typo3temp/assets/compressed/consent-f1a2edcb8142d5607a969af4a8018c04.js?177641643720 KB—✗3rd
https://www.univie.ac.at/typo3temp/assets/compressed/Form.min-1ba5162e9be9175c849626b3f2eb16b2.js?177641643724 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

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
7 hints, 0 missing preconnects
PASS
7 hints, 0 missing preconnects
Info::
Page uses 7 resource hint(s)

Current Resource Hints

preconnect
—
preload
7
dns-prefetch
—
prefetch
—

7 resource hints configured

A
Page Weight Inventory
30 resources · 973 KB · 40 KB savings available
PASS
30 resources · 973 KB · 40 KB savings available
Info::
Within 1MB page-weight target
Got: 973 KB
Warning::
29 third-party resources (100% of weight)
Info::
1 resources over 200KB
30 resources · 972.5 KiB · 29 third-party Within 1MB page-weight target
Image 63% · 616.0 KiB
Font 16% · 152.7 KiB
JavaScript 15% · 143.6 KiB
Document 4% · 34.4 KiB
CSS 3% · 25.3 KiB
Other 0% · 547 B

~40.3 KiB of savings available

Remove unused JavaScript: 40.3 KiB
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
30 requests over 1398ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.0 s LCP 4.0 shttps://univie.ac.at// https://univie.ac.at/ — 301 — 279 B — 88 ms — h2https://www.univie.ac.at/www.univie.ac.at/ https://www.univie.ac.at/ — 200 — 34.1 KiB — 111 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Css/libs/splide-core.min.css?1776333644www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Css/libs/splide-core.min.css?1776333644 — 200 — 865 B — 41 ms — h2https://www.univie.ac.at/typo3temp/assets/compressed/merged-508f6b06a9f2e08355e8ebb9655ba3f2-2ccb56b46a8064de9a1be45f877ee2f7.css?1776416437www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/compressed/merged-508f6b06a9f2e08355e8ebb9655ba3f2-2ccb56b46a8064de9a1be45f877ee2f7.css?1776416437 — 200 — 24.4 KiB — 91 ms — h2https://www.univie.ac.at/typo3temp/assets/compressed/merged-6ac95fefb81a42397b404b9d19266665-f3875072ca2d93c26d803fb7532c09fb.js?1776416437www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/compressed/merged-6ac95fefb81a42397b404b9d19266665-f3875072ca2d93c26d803fb7532c09fb.js?1776416437 — 200 — 830 B — 70 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/JavaScript/libs/splide.min.js?1776333644www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/JavaScript/libs/splide.min.js?1776333644 — 200 — 12.8 KiB — 76 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-regular.woff2www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-regular.woff2 — 200 — 23.5 KiB — 39 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-italic.woff2www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-italic.woff2 — 200 — 24.8 KiB — 63 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-600.woff2www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-600.woff2 — 200 — 24.1 KiB — 82 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-600italic.woff2www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Inter/inter-v18-latin-600italic.woff2 — 200 — 25.6 KiB — 80 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/SourceSerif4/source-serif-4-v8-latin-regular.woff2www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/SourceSerif4/source-serif-4-v8-latin-regular.woff2 — 200 — 19.9 KiB — 79 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/SourceSerif4/source-serif-4-v8-latin-italic.woff2www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/SourceSerif4/source-serif-4-v8-latin-italic.woff2 — 200 — 20.0 KiB — 79 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Icons/icons.woff2www.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Fonts/Icons/icons.woff2 — 200 — 14.7 KiB — 79 ms — h2https://www.univie.ac.at/_assets/2076be5e7c25c5348e8257623059b612/JavaScript/OpenStreetMap2.min.js?1776333648www.univie.ac.at/_assets/2076be5e7c... https://www.univie.ac.at/_assets/2076be5e7c25c5348e8257623059b612/JavaScript/OpenStreetMap2.min.js?1776333648 — 200 — 2.7 KiB — 64 ms — h2https://www.univie.ac.at/_assets/2076be5e7c25c5348e8257623059b612/JavaScript/leaflet.min.js?1776333648www.univie.ac.at/_assets/2076be5e7c... https://www.univie.ac.at/_assets/2076be5e7c25c5348e8257623059b612/JavaScript/leaflet.min.js?1776333648 — 200 — 48.5 KiB — 36 ms — h2https://www.univie.ac.at/typo3temp/assets/compressed/manifest-e953c744e23f4e0bd5550d0514b93058.js?1776416437www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/compressed/manifest-e953c744e23f4e0bd5550d0514b93058.js?1776416437 — 200 — 749 B — 26 ms — h2https://www.univie.ac.at/typo3temp/assets/compressed/vendor-47339f445dd7e983894c54641db10bad.js?1776416437www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/compressed/vendor-47339f445dd7e983894c54641db10bad.js?1776416437 — 200 — 20.5 KiB — 32 ms — h2https://www.univie.ac.at/typo3temp/assets/compressed/main-e4e951d7d2f137e3c4eb47dc29a9fde1.js?1776416437www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/compressed/main-e4e951d7d2f137e3c4eb47dc29a9fde1.js?1776416437 — 200 — 816 B — 26 ms — h2https://www.univie.ac.at/typo3temp/assets/compressed/iframemanager-b4181be083422a4f9e614b971d3c635e.js?1776416437www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/compressed/iframemanager-b4181be083422a4f9e614b971d3c635e.js?1776416437 — 200 — 7.2 KiB — 28 ms — h2https://www.univie.ac.at/typo3temp/assets/compressed/consent-f1a2edcb8142d5607a969af4a8018c04.js?1776416437www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/compressed/consent-f1a2edcb8142d5607a969af4a8018c04.js?1776416437 — 200 — 19.9 KiB — 35 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Images/Logos/univie.svgwww.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Images/Logos/univie.svg — 200 — 23.9 KiB — 30 ms — h2https://www.univie.ac.at/typo3temp/assets/compressed/Form.min-1ba5162e9be9175c849626b3f2eb16b2.js?1776416437www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/compressed/Form.min-1ba5162e9be9175c849626b3f2eb16b2.js?1776416437 — 200 — 24.1 KiB — 41 ms — h2https://www.univie.ac.at/typo3temp/assets/cookieconfig06ada6b9f0c9ad8076c9fed4d76cd4283.js?1776756190www.univie.ac.at/typo3temp/assets/c... https://www.univie.ac.at/typo3temp/assets/cookieconfig06ada6b9f0c9ad8076c9fed4d76cd4283.js?1776756190 — 200 — 5.7 KiB — 25 ms — h2https://www.univie.ac.at/fileadmin/_processed_/a/e/csm_Uni-Wien-Top-100-Ranking-Hauptgebauede-DE-orig_6399976c01.webpwww.univie.ac.at/fileadmin/_process... https://www.univie.ac.at/fileadmin/_processed_/a/e/csm_Uni-Wien-Top-100-Ranking-Hauptgebauede-DE-orig_6399976c01.webp — 200 — 47.9 KiB — 50 ms — h2https://www.univie.ac.at/fileadmin/_processed_/4/3/csm_20250425_HG_Hoersaal_33_C_Ian_Ehm_16_2_59b5dc0bb3.jpgwww.univie.ac.at/fileadmin/_process... https://www.univie.ac.at/fileadmin/_processed_/4/3/csm_20250425_HG_Hoersaal_33_C_Ian_Ehm_16_2_59b5dc0bb3.jpg — 200 — 73.0 KiB — 48 ms — h2https://www.univie.ac.at/fileadmin/_processed_/d/f/csm_20260305_LNF_3200x1081_Highlight_Banner_4e01c576d6.pngwww.univie.ac.at/fileadmin/_process... https://www.univie.ac.at/fileadmin/_processed_/d/f/csm_20260305_LNF_3200x1081_Highlight_Banner_4e01c576d6.png — 200 — 375.3 KiB — 98 ms — h2https://www.univie.ac.at/fileadmin/_processed_/2/e/csm_HG_20250609_HG_Arkadenhof_bw_C_Ian_Ehm_05_d1338201a1.jpgwww.univie.ac.at/fileadmin/_process... https://www.univie.ac.at/fileadmin/_processed_/2/e/csm_HG_20250609_HG_Arkadenhof_bw_C_Ian_Ehm_05_d1338201a1.jpg — 200 — 66.5 KiB — 62 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Icons/Favicons/site.webmanifestwww.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Icons/Favicons/site.webmanifest — 200 — 547 B — 70 ms — h2https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Icons/Favicons/favicon-32x32.pngwww.univie.ac.at/_assets/12d6b27de3... https://www.univie.ac.at/_assets/12d6b27de3745b4c3b247e6ea4f9bbcc/Icons/Favicons/favicon-32x32.png — 200 — 1.6 KiB — 23 ms — h2https://www.univie.ac.at/fileadmin/_processed_/d/6/csm_Together_we_grow.___Universitaet_Wien_424ae70288.webpwww.univie.ac.at/fileadmin/_process... https://www.univie.ac.at/fileadmin/_processed_/d/6/csm_Together_we_grow.___Universitaet_Wien_424ae70288.webp — 200 — 27.7 KiB — 25 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 1741ms · 102KB · €19/mo
www.univie.ac.at
Other
Costly
Execution 572ms
Transfer 34 KB
Monthly Cost €6/mo
www.univie.ac.at
Other
Costly
Execution 478ms
Transfer 1 KB
Monthly Cost €5/mo
Unattributable
Other
Costly
Execution 291ms
Transfer 0 KB
Monthly Cost €3/mo
www.univie.ac.at
Other
Optional
Execution 173ms
Transfer 6 KB
Monthly Cost €2/mo
www.univie.ac.at
Other
Optional
Execution 141ms
Transfer 13 KB
Monthly Cost €2/mo
www.univie.ac.at
Other
Optional
Execution 85ms
Transfer 48 KB
Unused 83%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.univie.ac.at adds 572ms and costs ~€6/month
  • www.univie.ac.at adds 478ms and costs ~€5/month
  • Unattributable adds 291ms 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

www.univie.ac.at takes 572ms 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.univie.ac.at takes 478ms 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 291ms 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

83% of www.univie.ac.at'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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