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https://fes.de

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
84
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.

2.42 s

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

2.78 s

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

118 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.

7.84 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.

4.86 s

Page Load Progression

892 ms
1.8 s
2.7 s
3.6 s
4.5 s
5.3 s
6.2 s
7.1 s
Checks
17
8 PASS 4 REVIEW 3 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.1 MiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4590ms total JS execution
FIX
4590ms total JS execution
Warning::
https://www.fes.de/_assets/39d34273ab30c098def3e42...: 3776ms CPU time
Warning::
Unattributable: 399ms CPU time
Warning::
https://www.fes.de/: 362ms CPU time
Info::
https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174...: 54ms CPU time
Warning::
Third-party scripts: 4590ms (100% of total)

Main Thread Breakdown

Script Evaluation 75% Other 14% Style & Layout 6%
ScriptTotalScriptingParse/CompileParty
https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.js?17758247343776ms3437ms37ms3rd
Unattributable399ms44ms0ms3rd
https://www.fes.de/362ms7ms1ms3rd
https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/JavaScript/cookie_consent.js?177150443654ms9ms1ms3rd
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
Page Weight Budget
1.1 MB transferred, 32 requests
REVIEW
1.1 MB transferred, 32 requests
Info::
Page weighs 3.1 MB (1.1 MB transferred)
Info::
32 HTTP requests
Info::
Estimated 0.23 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
32 requests
0.23 g CO2 per page load
Other 522.4 KiB 47%
Images 266.4 KiB 24%
JavaScript 135.3 KiB 12%
Fonts 91.3 KiB 8%
CSS 65.6 KiB 6%
HTML 37.4 KiB 3%
Other 3.8 KiB 0%
Other 679 B 0%
0 2.4 MB 4.9 MB
Under budget
B
Image Optimization
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Info::
All images are well-optimized
10 images 266 KB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
C
JS Bundles
Action
7 scripts, 87 KB unused
REVIEW
7 scripts, 87 KB unused
Warning::
https://www.fes.de/_assets/39d34273ab30c098def3e42...: 48 KB unused (94%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.fes.de/_assets/vite/desktop-navigation...: 39 KB unused (81%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.fes.de/_assets/vite/desktop-navigation...: unminified — 11 KB could be saved
Warning::
https://www.fes.de/_assets/vite/fes-theme.js: unminified — 6 KB could be saved
Info::
Total unused JavaScript: 87 KB
87 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.js?177582473452 KB48 KB (94%)✓3rd
https://www.fes.de/_assets/vite/desktop-navigation.js48 KB39 KB (81%)✗3rd
https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Libs/eye-able-tool.js?17758247335 KB—✓3rd
https://www.fes.de/typo3temp/assets/js/7378d5dc5468da27b323e43dae530540.js?17639733982 KB—✓3rd
https://www.fes.de/_assets/vite/fes-theme.js24 KB—✗3rd
https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/JavaScript/cookie_consent.js?17715044364 KB—✓3rd
https://www.fes.de/_assets/vite/_commonjsHelpers.js1 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

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
3 fonts (91 KB)
PASS
3 fonts (91 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

91 KB total

Render-blocking

0

of 3

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 2.4 s LCP 2.8 shttps://www.fes.de/_assets/vite/Ebert-Regular.woff2Ebert-Regular.woff2 https://www.fes.de/_assets/vite/Ebert-Regular.woff2 — 30.0 KiB — 36 ms — font-display: swaphttps://www.fes.de/_assets/vite/Ebert-Bold.woff2Ebert-Bold.woff2 https://www.fes.de/_assets/vite/Ebert-Bold.woff2 — 30.5 KiB — 52 ms — font-display: swaphttps://www.fes.de/_assets/vite/Ebert-Headline.woff2Ebert-Headline.woff2 https://www.fes.de/_assets/vite/Ebert-Headline.woff2 — 30.8 KiB — 34 ms — font-display: swap
Ebert-Regular.woff2 woff2 swap
Size 30 KB
Load time 36 ms
Start 4.3 s
Risk FOUT — text flashes from fallback to web font
Ebert-Bold.woff2 woff2 swap
Size 31 KB
Load time 52 ms
Start 4.3 s
Risk FOUT — text flashes from fallback to web font
Ebert-Headline.woff2 woff2 swap
Size 31 KB
Load time 34 ms
Start 4.3 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
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
Page Weight Inventory
32 resources · 1.1 MB · 87 KB savings available
PASS
32 resources · 1.1 MB · 87 KB savings available
Warning::
Page weight 99 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~87 KB of savings available
Warning::
31 third-party resources (100% of weight)
Info::
1 resources over 200KB
32 resources · 1.1 MiB · 31 third-party 98.8 KiB over 1MB target
Other 47% · 523.0 KiB
Image 24% · 270.1 KiB
JavaScript 12% · 135.3 KiB
Font 8% · 91.3 KiB
CSS 6% · 65.6 KiB
Document 3% · 37.5 KiB

~86.8 KiB of savings available

Remove unused JavaScript: 86.8 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
32 requests over 4819ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.4 s LCP 2.8 shttps://fes.de// https://fes.de/ — 301 — 75 B — 106 ms — h2https://www.fes.de/www.fes.de/ https://www.fes.de/ — 200 — 37.4 KiB — 4.1 s — h2https://www.fes.de/typo3temp/assets/compressed/merged-8a9a09a923cbb632a2c518864a63e220.css?1776267167www.fes.de/typo3temp/assets/compres... https://www.fes.de/typo3temp/assets/compressed/merged-8a9a09a923cbb632a2c518864a63e220.css?1776267167 — 200 — 670 B — 34 ms — h2https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.css?1775824734www.fes.de/_assets/39d34273ab30c098... https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.css?1775824734 — 200 — 744 B — 35 ms — h2https://www.fes.de/_assets/vite/fes-theme.csswww.fes.de/_assets/vite/fes-theme.c... https://www.fes.de/_assets/vite/fes-theme.css — 200 — 62.0 KiB — 80 ms — h2https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/Stylesheet/cookie_consent.css?1771504436www.fes.de/_assets/e8c90b9983c1cf95... https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/Stylesheet/cookie_consent.css?1771504436 — 200 — 2.2 KiB — 46 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Libs/eye-able-tool.js?1775824733www.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Libs/eye-able-tool.js?1775824733 — 200 — 5.1 KiB — 47 ms — h2https://www.fes.de/typo3temp/assets/js/7378d5dc5468da27b323e43dae530540.js?1763973398www.fes.de/typo3temp/assets/js/7378... https://www.fes.de/typo3temp/assets/js/7378d5dc5468da27b323e43dae530540.js?1763973398 — 200 — 1.6 KiB — 44 ms — h2https://collections.fes.de/publikationen/image/largethumb/1972977collections.fes.de/publikationen/im... https://collections.fes.de/publikationen/image/largethumb/1972977 — 200 — 32.1 KiB — 455 ms — h2https://collections.fes.de/publikationen/image/largethumb/1972636collections.fes.de/publikationen/im... https://collections.fes.de/publikationen/image/largethumb/1972636 — 200 — 36.7 KiB — 455 ms — h2https://www.fes.de/_assets/vite/fes-theme.jswww.fes.de/_assets/vite/fes-theme.j... https://www.fes.de/_assets/vite/fes-theme.js — 200 — 24.2 KiB — 61 ms — h2https://collections.fes.de/publikationen/image/largethumb/1970601collections.fes.de/publikationen/im... https://collections.fes.de/publikationen/image/largethumb/1970601 — 200 — 62.0 KiB — 385 ms — h2https://collections.fes.de/publikationen/image/largethumb/1969447collections.fes.de/publikationen/im... https://collections.fes.de/publikationen/image/largethumb/1969447 — 200 — 61.1 KiB — 355 ms — h2https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.js?1775824734www.fes.de/_assets/39d34273ab30c098... https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.js?1775824734 — 200 — 51.7 KiB — 50 ms — h2https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/JavaScript/cookie_consent.js?1771504436www.fes.de/_assets/e8c90b9983c1cf95... https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/JavaScript/cookie_consent.js?1771504436 — 200 — 4.0 KiB — 38 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/General/logo-fes.svgwww.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/General/logo-fes.svg — 200 — 4.4 KiB — 39 ms — h2data:image/svg+xml,%3csvg%20class='icon'%20width='16'%20height='17'%20viewBox='0%200%2016%2017'%20f…data:image/svg+xml,%3csvg%20class='... data:image/svg+xml,%3csvg%20class='icon'%20width='16'%20height='17'%20viewBox='0%200%2016%2017'%20f… — 200 — 0 B — 0 ms — datahttps://www.fes.de/index.php?eID=dumpFile&t=p&p=1404204&token=21976e0fcb95cf4a9304c04b963fe59f25ba6b80www.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=p&p=1404204&token=21976e0fcb95cf4a9304c04b963fe59f25ba6b80 — 200 — 24.9 KiB — 77 ms — h2https://www.fes.de/index.php?eID=dumpFile&t=p&p=1402709&token=5448e8945174412776018bdded3c629d944559f4www.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=p&p=1402709&token=5448e8945174412776018bdded3c629d944559f4 — 200 — 4.1 KiB — 85 ms — h2https://www.fes.de/index.php?eID=dumpFile&t=p&p=1383779&token=85a2ccac7d1363d3b8c9b5ffe8a00cf2477a040dwww.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=p&p=1383779&token=85a2ccac7d1363d3b8c9b5ffe8a00cf2477a040d — 200 — 22.7 KiB — 68 ms — h2https://www.fes.de/index.php?eID=dumpFile&t=p&p=1402498&token=19bb3713902b48b520165b91bace21980780e071www.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=p&p=1402498&token=19bb3713902b48b520165b91bace21980780e071 — 200 — 18.5 KiB — 83 ms — h2https://www.fes.de/_assets/vite/Ebert-Regular.woff2www.fes.de/_assets/vite/Ebert-Regul... https://www.fes.de/_assets/vite/Ebert-Regular.woff2 — 200 — 30.0 KiB — 36 ms — h2https://www.fes.de/_assets/vite/Ebert-Bold.woff2www.fes.de/_assets/vite/Ebert-Bold.... https://www.fes.de/_assets/vite/Ebert-Bold.woff2 — 200 — 30.5 KiB — 52 ms — h2https://www.fes.de/_assets/vite/Ebert-Headline.woff2www.fes.de/_assets/vite/Ebert-Headl... https://www.fes.de/_assets/vite/Ebert-Headline.woff2 — 200 — 30.8 KiB — 34 ms — h2https://www.fes.de/_assets/vite/desktop-navigation.jswww.fes.de/_assets/vite/desktop-nav... https://www.fes.de/_assets/vite/desktop-navigation.js — 200 — 48.1 KiB — 46 ms — h2https://www.fes.de/_assets/vite/_commonjsHelpers.jswww.fes.de/_assets/vite/_commonjsHe... https://www.fes.de/_assets/vite/_commonjsHelpers.js — 200 — 632 B — 34 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/site.webmanifest?1775824733www.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/site.webmanifest?1775824733 — 200 — 679 B — 112 ms — h2https://cdn.jsdelivr.net/npm/@lottiefiles/dotlottie-web@0.40.1/dist/dotlottie-player.wasmcdn.jsdelivr.net/npm/@lottiefiles/d... https://cdn.jsdelivr.net/npm/@lottiefiles/dotlottie-web@0.40.1/dist/dotlottie-player.wasm — 200 — 490.5 KiB — 58 ms — h2https://www.fes.de/index.php?eID=dumpFile&t=f&f=133088&token=f6135fd42b0bd24c796ec88601a7fe5d59c22a0ewww.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=f&f=133088&token=f6135fd42b0bd24c796ec88601a7fe5d59c22a0e — 200 — 31.9 KiB — 101 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/favicon.ico?1775824733www.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/favicon.ico?1775824733 — 200 — 2.0 KiB — 36 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.4 s LCP 2.8 shttps://fes.de// https://fes.de/ — 301 — 75 B — 106 ms — h2https://www.fes.de/www.fes.de/ https://www.fes.de/ — 200 — 37.4 KiB — 4.1 s — h2https://www.fes.de/typo3temp/assets/compressed/merged-8a9a09a923cbb632a2c518864a63e220.css?1776267167www.fes.de/typo3temp/assets/compres... https://www.fes.de/typo3temp/assets/compressed/merged-8a9a09a923cbb632a2c518864a63e220.css?1776267167 — 200 — 670 B — 34 ms — h2https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.css?1775824734www.fes.de/_assets/39d34273ab30c098... https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.css?1775824734 — 200 — 744 B — 35 ms — h2https://www.fes.de/_assets/vite/fes-theme.csswww.fes.de/_assets/vite/fes-theme.c... https://www.fes.de/_assets/vite/fes-theme.css — 200 — 62.0 KiB — 80 ms — h2https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/Stylesheet/cookie_consent.css?1771504436www.fes.de/_assets/e8c90b9983c1cf95... https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/Stylesheet/cookie_consent.css?1771504436 — 200 — 2.2 KiB — 46 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Libs/eye-able-tool.js?1775824733www.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Libs/eye-able-tool.js?1775824733 — 200 — 5.1 KiB — 47 ms — h2https://www.fes.de/typo3temp/assets/js/7378d5dc5468da27b323e43dae530540.js?1763973398www.fes.de/typo3temp/assets/js/7378... https://www.fes.de/typo3temp/assets/js/7378d5dc5468da27b323e43dae530540.js?1763973398 — 200 — 1.6 KiB — 44 ms — h2https://collections.fes.de/publikationen/image/largethumb/1972977collections.fes.de/publikationen/im... https://collections.fes.de/publikationen/image/largethumb/1972977 — 200 — 32.1 KiB — 455 ms — h2https://collections.fes.de/publikationen/image/largethumb/1972636collections.fes.de/publikationen/im... https://collections.fes.de/publikationen/image/largethumb/1972636 — 200 — 36.7 KiB — 455 ms — h2https://www.fes.de/_assets/vite/fes-theme.jswww.fes.de/_assets/vite/fes-theme.j... https://www.fes.de/_assets/vite/fes-theme.js — 200 — 24.2 KiB — 61 ms — h2https://collections.fes.de/publikationen/image/largethumb/1970601collections.fes.de/publikationen/im... https://collections.fes.de/publikationen/image/largethumb/1970601 — 200 — 62.0 KiB — 385 ms — h2https://collections.fes.de/publikationen/image/largethumb/1969447collections.fes.de/publikationen/im... https://collections.fes.de/publikationen/image/largethumb/1969447 — 200 — 61.1 KiB — 355 ms — h2https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.js?1775824734www.fes.de/_assets/39d34273ab30c098... https://www.fes.de/_assets/39d34273ab30c098def3e42400bf98d1/dist/lottie-player.js?1775824734 — 200 — 51.7 KiB — 50 ms — h2https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/JavaScript/cookie_consent.js?1771504436www.fes.de/_assets/e8c90b9983c1cf95... https://www.fes.de/_assets/e8c90b9983c1cf95dcc0174e76f0c198/JavaScript/cookie_consent.js?1771504436 — 200 — 4.0 KiB — 38 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/General/logo-fes.svgwww.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/General/logo-fes.svg — 200 — 4.4 KiB — 39 ms — h2data:image/svg+xml,%3csvg%20class='icon'%20width='16'%20height='17'%20viewBox='0%200%2016%2017'%20f…data:image/svg+xml,%3csvg%20class='... data:image/svg+xml,%3csvg%20class='icon'%20width='16'%20height='17'%20viewBox='0%200%2016%2017'%20f… — 200 — 0 B — 0 ms — datahttps://www.fes.de/index.php?eID=dumpFile&t=p&p=1404204&token=21976e0fcb95cf4a9304c04b963fe59f25ba6b80www.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=p&p=1404204&token=21976e0fcb95cf4a9304c04b963fe59f25ba6b80 — 200 — 24.9 KiB — 77 ms — h2https://www.fes.de/index.php?eID=dumpFile&t=p&p=1402709&token=5448e8945174412776018bdded3c629d944559f4www.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=p&p=1402709&token=5448e8945174412776018bdded3c629d944559f4 — 200 — 4.1 KiB — 85 ms — h2https://www.fes.de/index.php?eID=dumpFile&t=p&p=1383779&token=85a2ccac7d1363d3b8c9b5ffe8a00cf2477a040dwww.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=p&p=1383779&token=85a2ccac7d1363d3b8c9b5ffe8a00cf2477a040d — 200 — 22.7 KiB — 68 ms — h2https://www.fes.de/index.php?eID=dumpFile&t=p&p=1402498&token=19bb3713902b48b520165b91bace21980780e071www.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=p&p=1402498&token=19bb3713902b48b520165b91bace21980780e071 — 200 — 18.5 KiB — 83 ms — h2https://www.fes.de/_assets/vite/Ebert-Regular.woff2www.fes.de/_assets/vite/Ebert-Regul... https://www.fes.de/_assets/vite/Ebert-Regular.woff2 — 200 — 30.0 KiB — 36 ms — h2https://www.fes.de/_assets/vite/Ebert-Bold.woff2www.fes.de/_assets/vite/Ebert-Bold.... https://www.fes.de/_assets/vite/Ebert-Bold.woff2 — 200 — 30.5 KiB — 52 ms — h2https://www.fes.de/_assets/vite/Ebert-Headline.woff2www.fes.de/_assets/vite/Ebert-Headl... https://www.fes.de/_assets/vite/Ebert-Headline.woff2 — 200 — 30.8 KiB — 34 ms — h2https://www.fes.de/_assets/vite/desktop-navigation.jswww.fes.de/_assets/vite/desktop-nav... https://www.fes.de/_assets/vite/desktop-navigation.js — 200 — 48.1 KiB — 46 ms — h2https://www.fes.de/_assets/vite/_commonjsHelpers.jswww.fes.de/_assets/vite/_commonjsHe... https://www.fes.de/_assets/vite/_commonjsHelpers.js — 200 — 632 B — 34 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/site.webmanifest?1775824733www.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/site.webmanifest?1775824733 — 200 — 679 B — 112 ms — h2https://cdn.jsdelivr.net/npm/@lottiefiles/dotlottie-web@0.40.1/dist/dotlottie-player.wasmcdn.jsdelivr.net/npm/@lottiefiles/d... https://cdn.jsdelivr.net/npm/@lottiefiles/dotlottie-web@0.40.1/dist/dotlottie-player.wasm — 200 — 490.5 KiB — 58 ms — h2https://www.fes.de/index.php?eID=dumpFile&t=f&f=133088&token=f6135fd42b0bd24c796ec88601a7fe5d59c22a0ewww.fes.de/index.php?eID=dumpFile&t... https://www.fes.de/index.php?eID=dumpFile&t=f&f=133088&token=f6135fd42b0bd24c796ec88601a7fe5d59c22a0e — 200 — 31.9 KiB — 101 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/favicon.ico?1775824733www.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/favicon.ico?1775824733 — 200 — 2.0 KiB — 36 ms — h2https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/favicon.svg?1775824733www.fes.de/_assets/9cec337f7d9b8a11... https://www.fes.de/_assets/9cec337f7d9b8a112ff7bc4a21068e10/Icons/Favicons/favicon.svg?1775824733 — 200 — 1.1 KiB — 34 ms — h2https://www.fes.de/_assets/60e06896ae96b2ec1a3c160bb6aafd81/Icons/favicon.icowww.fes.de/_assets/60e06896ae96b2ec... https://www.fes.de/_assets/60e06896ae96b2ec1a3c160bb6aafd81/Icons/favicon.ico — 200 — 674 B — 37 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 4590ms · 93KB · €50/mo
www.fes.de
Other
Costly
Execution 3776ms
Transfer 52 KB
Unused 94%
Monthly Cost €41/mo
Unattributable
Other
Costly
Execution 399ms
Transfer 0 KB
Monthly Cost €4/mo
www.fes.de
Other
Costly
Execution 362ms
Transfer 37 KB
Monthly Cost €4/mo
www.fes.de
Other
Optional
Execution 54ms
Transfer 4 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.fes.de adds 3776ms and costs ~€41/month
  • Unattributable adds 399ms and costs ~€4/month
  • www.fes.de adds 362ms and costs ~€4/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.fes.de takes 3776ms 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

94% of www.fes.de's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Unattributable takes 399ms 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.fes.de takes 362ms 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

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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