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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
6
REVIEW
0
PASS
9
INFO
2

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

Mobile Desktop
61
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
98
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

5.73 s

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

7.16 s

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

114 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.

5.74 s

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

7.17 s

Page Load Progression

468 ms
936 ms
1.4 s
1.9 s
2.3 s
2.8 s
3.3 s
3.7 s
Checks
17
9 PASS 6 FIX
F
Page Weight Budget
Action
4.1 MB transferred, 53 requests
FIX
4.1 MB transferred, 53 requests
Critical::
Page weighs 6.4 MB (4.1 MB transferred)
Warning::
JavaScript is 664 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 664 KB
Info::
53 HTTP requests
Info::
Estimated 0.86 g CO2 per page load
4.1 MB / 2.4 MB budget
4.1 MB transferred
53 requests
0.86 g CO2 per page load
Other 2.9 MiB 72%
JavaScript 663.5 KiB 16%
Images 182.2 KiB 4%
Fonts 144.1 KiB 3%
CSS 109.0 KiB 3%
Other 31.9 KiB 1%
HTML 19.3 KiB 0%
Other 16.2 KiB 0%
Other 15.2 KiB 0%
Other 1.1 KiB 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (4.1 MiB of 4.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2554ms total JS execution
FIX
2554ms total JS execution
Warning::
https://www.giz.de/themes/custom/dreist/build/asse...: 948ms CPU time
Warning::
Unattributable: 408ms CPU time
Warning::
https://www.giz.de/themes/custom/dreist/build/asse...: 388ms CPU time
Warning::
https://www.giz.de/sites/default/files/js/js_qA-cA...: 328ms CPU time
Warning::
https://www.giz.de/de: 259ms CPU time
Warning::
Third-party scripts: 2554ms (100% of total)

Main Thread Breakdown

Other 40% Script Evaluation 31% Style & Layout 19% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.giz.de/themes/custom/dreist/build/assets/main-V0bZPR98.js?v=1.x948ms158ms2ms3rd
Unattributable408ms29ms0ms3rd
https://www.giz.de/themes/custom/dreist/build/assets/globe.gl-DRxo2KMk.js388ms235ms2ms3rd
https://www.giz.de/sites/default/files/js/js_qA-cA29LKyLnnosrOIy-i1asgdzHVXpU6QPXtCgLmpc.js?scope=footer&delta=0&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh8328ms201ms10ms3rd
https://www.giz.de/de259ms5ms0ms3rd
https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-player.js222ms165ms29ms3rd
D
JS Bundles
Action
16 scripts, 384 KB unused
FIX
16 scripts, 384 KB unused
Warning::
https://www.giz.de/themes/custom/dreist/build/asse...: 119 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.giz.de/themes/custom/dreist/build/asse...: 102 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.giz.de/themes/custom/dreist/build/asse...: 77 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.giz.de/modules/contrib/media_entity_lo...: 61 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.giz.de/sites/default/files/js/js_qA-cA...: 25 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 384 KB
384 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.giz.de/themes/custom/dreist/build/assets/three.module-B7vxYcSd.js172 KB119 KB (70%)✓3rd
https://www.giz.de/themes/custom/dreist/build/assets/globe.gl-DRxo2KMk.js160 KB102 KB (64%)✓3rd
https://www.giz.de/themes/custom/dreist/build/assets/main-V0bZPR98.js?v=1.x120 KB77 KB (65%)✓3rd
https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-player.js97 KB61 KB (63%)✓3rd
https://www.giz.de/sites/default/files/js/js_qA-cA29LKyLnnosrOIy-i1asgdzHVXpU6QPXtCgLmpc.js?scope=footer&delta=0&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh838 KB25 KB (67%)✓3rd
https://www.giz.de/sites/default/files/js/js_Yqaeyz2UI5Cf_75-KvVLdkEVopZci4Fq1PHMaafS6J8.js?scope=footer&delta=4&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh84 KB—✓3rd
https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-interactivity.min.js6 KB—✓3rd
https://www.giz.de/sites/default/files/js/js_KcyRp1FAIsuBKUlALjYyxgecqN1t399PZEXMaWb3vl4.js?scope=footer&delta=7&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh82 KB—✓3rd
https://www.giz.de/libraries/klaro/dist/klaro-no-translations-no-css.js?tdwj2s22 KB—✓3rd
https://www.giz.de/themes/custom/dreist/build/assets/preload-helper-nCqaJ-ZS.js2 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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
53 resources · 4.1 MB · 384 KB savings available
FIX
53 resources · 4.1 MB · 384 KB savings available
Warning::
Page weight 3.1 MB over 1MB target
Got: 4.1 MB Expected: ≤ 1 MB
Info::
~384 KB of savings available
Warning::
52 third-party resources (100% of weight)
Info::
1 resources over 200KB
53 resources · 4.1 MiB · 52 third-party 3.1 MiB over 1MB target
Media 72% · 2.9 MiB
JavaScript 16% · 663.5 KiB
Image 5% · 211.2 KiB
Font 3% · 144.1 KiB
CSS 3% · 109.0 KiB
Other 1% · 31.3 KiB
Document 1% · 23.4 KiB

~383.8 KiB of savings available

Remove unused JavaScript: 383.8 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.

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+
Image Optimization
5 images, 0 KB saveable
PASS
5 images, 0 KB saveable
Info::
All images are well-optimized
5 images 182 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
3 fonts (144 KB)
PASS
3 fonts (144 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

144 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 5.0 s 6.0 s 7.0 s FCP 5.7 s LCP 7.2 shttps://www.giz.de/themes/custom/dreist/build/assets/noto-sans-regular-latin-CNjVLNEg.woff2noto-sans-regular-latin... https://www.giz.de/themes/custom/dreist/build/assets/noto-sans-regular-latin-CNjVLNEg.woff2 — 59.7 KiB — 80 ms — font-display: swaphttps://www.giz.de/themes/custom/dreist/build/assets/lineto-gravurcondensed-regular-0Lp4wnN7.wofflineto-gravurcondensed-... https://www.giz.de/themes/custom/dreist/build/assets/lineto-gravurcondensed-regular-0Lp4wnN7.woff — 42.0 KiB — 83 ms — font-display: swaphttps://www.giz.de/themes/custom/dreist/build/assets/lineto-gravurcondensed-bold-FP1004jv.wofflineto-gravurcondensed-... https://www.giz.de/themes/custom/dreist/build/assets/lineto-gravurcondensed-bold-FP1004jv.woff — 42.4 KiB — 81 ms — font-display: swap
noto-sans-regular-latin... woff2 swap
Size 60 KB
Load time 80 ms
Start 533 ms
Risk FOUT — text flashes from fallback to web font
lineto-gravurcondensed-... woff swap
Size 42 KB
Load time 83 ms
Start 533 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
lineto-gravurcondensed-... woff swap
Size 42 KB
Load time 81 ms
Start 533 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~25 KB and ~50 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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

Network Waterfall
53 requests over 1439ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 5.7 s LCP 7.2 shttps://giz.de// https://giz.de/ — 301 — 89 B — 101 ms — h2https://www.giz.de/www.giz.de/ https://www.giz.de/ — 301 — 1.3 KiB — 42 ms — h2https://www.giz.de/dewww.giz.de/de https://www.giz.de/de — 200 — 19.3 KiB — 78 ms — h2https://www.giz.de/sites/default/files/css/css_ABEUsKtdkMXYoDcdok2U9Ai25tRg94UGh6Slg8lSL_o.css?delta=0&language=de&theme=dreist&include=eJxtjEsOwjAMRC9k4iNFrmxohNNYdlLU21PKd8Fm5s0sHnMmrmVBfgHsoLS10bOR08XJZvzzAbuU6Pis9zI-57XITRyuSt7wyF8-tVXcCwt8VLFLhpGm75PGYmPSErMwxBZdKk4UAg954JGpNh4qd-_RTAIwww.giz.de/sites/default/files/css/... https://www.giz.de/sites/default/files/css/css_ABEUsKtdkMXYoDcdok2U9Ai25tRg94UGh6Slg8lSL_o.css?delta=0&language=de&theme=dreist&include=eJxtjEsOwjAMRC9k4iNFrmxohNNYdlLU21PKd8Fm5s0sHnMmrmVBfgHsoLS10bOR08XJZvzzAbuU6Pis9zI-57XITRyuSt7wyF8-tVXcCwt8VLFLhpGm75PGYmPSErMwxBZdKk4UAg954JGpNh4qd-_RTAI — 200 — 7.5 KiB — 39 ms — h2https://www.giz.de/themes/custom/dreist/build/assets/main-CFLzT4kq.css?tdwj2swww.giz.de/themes/custom/dreist/bui... https://www.giz.de/themes/custom/dreist/build/assets/main-CFLzT4kq.css?tdwj2s — 200 — 71.4 KiB — 141 ms — h2https://www.giz.de/themes/custom/dreist/build/assets/pdfviewer-C6dmLGKR.css?tdwj2swww.giz.de/themes/custom/dreist/bui... https://www.giz.de/themes/custom/dreist/build/assets/pdfviewer-C6dmLGKR.css?tdwj2s — 200 — 30.1 KiB — 154 ms — h2https://www.giz.de/sites/default/files/js/js_qA-cA29LKyLnnosrOIy-i1asgdzHVXpU6QPXtCgLmpc.js?scope=footer&delta=0&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh8www.giz.de/sites/default/files/js/j... https://www.giz.de/sites/default/files/js/js_qA-cA29LKyLnnosrOIy-i1asgdzHVXpU6QPXtCgLmpc.js?scope=footer&delta=0&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh8 — 200 — 38.4 KiB — 113 ms — h2https://www.giz.de/themes/custom/dreist/build/assets/main-V0bZPR98.js?v=1.xwww.giz.de/themes/custom/dreist/bui... https://www.giz.de/themes/custom/dreist/build/assets/main-V0bZPR98.js?v=1.x — 200 — 120.0 KiB — 171 ms — h2https://www.giz.de/themes/custom/dreist/build/assets/globe-GEco2LlF.js?v=1.xwww.giz.de/themes/custom/dreist/bui... https://www.giz.de/themes/custom/dreist/build/assets/globe-GEco2LlF.js?v=1.x — 200 — 3.1 KiB — 168 ms — h2https://www.giz.de/themes/custom/dreist/build/assets/pdfviewer-Ba-LrDvV.js?v=1.xwww.giz.de/themes/custom/dreist/bui... https://www.giz.de/themes/custom/dreist/build/assets/pdfviewer-Ba-LrDvV.js?v=1.x — 200 — 3.1 KiB — 168 ms — h2https://www.giz.de/sites/default/files/js/js_Yqaeyz2UI5Cf_75-KvVLdkEVopZci4Fq1PHMaafS6J8.js?scope=footer&delta=4&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh8www.giz.de/sites/default/files/js/j... https://www.giz.de/sites/default/files/js/js_Yqaeyz2UI5Cf_75-KvVLdkEVopZci4Fq1PHMaafS6J8.js?scope=footer&delta=4&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh8 — 200 — 3.8 KiB — 168 ms — h2https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-player.jswww.giz.de/modules/contrib/media_en... https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-player.js — 200 — 97.4 KiB — 174 ms — h2https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-interactivity.min.jswww.giz.de/modules/contrib/media_en... https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-interactivity.min.js — 200 — 5.6 KiB — 174 ms — h2https://www.giz.de/sites/default/files/js/js_KcyRp1FAIsuBKUlALjYyxgecqN1t399PZEXMaWb3vl4.js?scope=footer&delta=7&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh8www.giz.de/sites/default/files/js/j... https://www.giz.de/sites/default/files/js/js_KcyRp1FAIsuBKUlALjYyxgecqN1t399PZEXMaWb3vl4.js?scope=footer&delta=7&language=de&theme=dreist&include=eJxtj1EOhDAIRC_U2CM1KFMlS1vT0jXefrvr-ucPw2MGEphDA9Vl83x309IrGQb2dUUzKXm6nCRZHD9sxFLT9HX_A8cV0sxfctOqZcYNO8fwFhyo7qVUi_9Vl8BCAdnEzqDFTOAvCbvSOdJPia8Vjg15nGwyK1yZY2_LeCMgkahnROpqH9aAXh8 — 200 — 2.1 KiB — 173 ms — h2https://www.giz.de/libraries/klaro/dist/klaro-no-translations-no-css.js?tdwj2swww.giz.de/libraries/klaro/dist/kla... https://www.giz.de/libraries/klaro/dist/klaro-no-translations-no-css.js?tdwj2s — 200 — 21.5 KiB — 54 ms — h2https://www.giz.de/themes/custom/dreist/assets/svg-sprite/symbol/svg/sprite.symbol.svgwww.giz.de/themes/custom/dreist/ass... https://www.giz.de/themes/custom/dreist/assets/svg-sprite/symbol/svg/sprite.symbol.svg — 200 — 23.1 KiB — 52 ms — h2https://www.giz.de/sites/default/files/media/video/2025-07/giz-header-startseite-neu-720p.webmwww.giz.de/sites/default/files/medi... 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KiB — 35 ms — h2https://www.giz.de/sites/default/files/favicon.icowww.giz.de/sites/default/files/favi... https://www.giz.de/sites/default/files/favicon.ico — 200 — 5.8 KiB — 36 ms — h2https://www.giz.de/sites/default/files/styles/tablet_16x9/public/media/image/2026-01/oneday-hannes-supermarkt.webp?itok=vk55nBOlwww.giz.de/sites/default/files/styl... https://www.giz.de/sites/default/files/styles/tablet_16x9/public/media/image/2026-01/oneday-hannes-supermarkt.webp?itok=vk55nBOl — 200 — 36.4 KiB — 50 ms — h2https://www.giz.de/sites/default/files/styles/tablet_1x1/public/media/image/2025-08/kooperation-wirtschaft.webp?h=119335f7&itok=rOkWVxtswww.giz.de/sites/default/files/styl... https://www.giz.de/sites/default/files/styles/tablet_1x1/public/media/image/2025-08/kooperation-wirtschaft.webp?h=119335f7&itok=rOkWVxts — 200 — 29.5 KiB — 47 ms — h2https://www.giz.de/sites/default/files/styles/tablet_1x1/public/media/image/2025-06/akzente-triple-win-05.webp?h=8abcec71&itok=FlJlY2t3www.giz.de/sites/default/files/styl... https://www.giz.de/sites/default/files/styles/tablet_1x1/public/media/image/2025-06/akzente-triple-win-05.webp?h=8abcec71&itok=FlJlY2t3 — 200 — 39.3 KiB — 53 ms — h2https://www.giz.de/sites/default/files/styles/tablet_1x1/public/media/image/2025-06/just-transition.webp?h=d9034aa8&itok=VYSC6xZiwww.giz.de/sites/default/files/styl... https://www.giz.de/sites/default/files/styles/tablet_1x1/public/media/image/2025-06/just-transition.webp?h=d9034aa8&itok=VYSC6xZi — 200 — 70.9 KiB — 53 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 2554ms · 435KB · €28/mo
www.giz.de
Other
Costly
Execution 948ms
Transfer 120 KB
Unused 65%
Monthly Cost €10/mo
Unattributable
Other
Costly
Execution 408ms
Transfer 0 KB
Monthly Cost €4/mo
www.giz.de
Other
Costly
Execution 388ms
Transfer 160 KB
Unused 64%
Monthly Cost €4/mo
www.giz.de
Other
Costly
Execution 328ms
Transfer 38 KB
Unused 67%
Monthly Cost €4/mo
www.giz.de
Other
Costly
Execution 259ms
Transfer 19 KB
Monthly Cost €3/mo
www.giz.de
Other
Costly
Execution 222ms
Transfer 97 KB
Unused 63%
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • www.giz.de adds 948ms and costs ~€10/month
  • Unattributable adds 408ms and costs ~€4/month
  • www.giz.de adds 388ms and costs ~€4/month
  • www.giz.de adds 328ms and costs ~€4/month
  • www.giz.de adds 259ms and costs ~€3/month
  • www.giz.de adds 222ms and costs ~€2/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.giz.de takes 948ms 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

65% of www.giz.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 408ms 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.giz.de takes 388ms 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

64% of www.giz.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

www.giz.de takes 328ms 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

67% of www.giz.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

www.giz.de takes 259ms 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.giz.de takes 222ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

63% of www.giz.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

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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