Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
985 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.18 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
3.06 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.342
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.41 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.
21.12 s
Page Load Progression
1.9 s
3.9 s
5.8 s
7.7 s
9.7 s
11.6 s
13.5 s
15.5 sFPage Weight BudgetAction6.0 MB transferred, 56 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction22436ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.giz.de/themes/custom/dreist/build/assets/main-V0bZPR98.js?v=1.x | 19804ms | 127ms | 0ms | 3rd |
| https://www.giz.de/themes/custom/dreist/build/assets/globe.gl-DRxo2KMk.js | 1944ms | 1907ms | 1ms | 3rd |
| Unattributable | 369ms | 152ms | 0ms | 3rd |
| https://www.giz.de/de | 147ms | 2ms | 0ms | 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_LeCMgkahnROpqH9aAXh8 | 99ms | 55ms | 3ms | 3rd |
| https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-player.js | 74ms | 56ms | 9ms | 3rd |
DJS BundlesAction16 scripts, 321 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.giz.de/themes/custom/dreist/build/assets/three.module-B7vxYcSd.js | 172 KB | 88 KB (52%) | ✓ | 3rd |
| https://www.giz.de/themes/custom/dreist/build/assets/main-V0bZPR98.js?v=1.x | 120 KB | 77 KB (65%) | ✓ | 3rd |
| https://www.giz.de/themes/custom/dreist/build/assets/globe.gl-DRxo2KMk.js | 160 KB | 70 KB (44%) | ✓ | 3rd |
| https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-player.js | 97 KB | 61 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_LeCMgkahnROpqH9aAXh8 | 38 KB | 25 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_LeCMgkahnROpqH9aAXh8 | 4 KB | — | ✓ | 3rd |
| https://www.giz.de/modules/contrib/media_entity_lottie/js/lottie-interactivity.min.js | 6 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_LeCMgkahnROpqH9aAXh8 | 2 KB | — | ✓ | 3rd |
| https://www.giz.de/libraries/klaro/dist/klaro-no-translations-no-css.js?tdwj2s | 22 KB | — | ✓ | 3rd |
| https://www.giz.de/themes/custom/dreist/build/assets/preload-helper-nCqaJ-ZS.js | 2 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
DPage Weight InventoryAction56 resources · 6.0 MB · 321 KB savings availableFIX
~321.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 56 resources | 6.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
A+Text CompressionAll text resources are compressedPASS
AImage Optimization8 images, 0 KB saveablePASS
A+Font Loading2 fonts (102 KB)PASS
Web fonts
2
102 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~13 KB and ~26 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Hetzner Online GmbH
Network Waterfall56 requests over 2174msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.giz.de www.giz.de | Other | 19804ms | 120 KB | 65% | €215/mo | Costly |
www.giz.de www.giz.de | Other | 1944ms | 160 KB | 44% | €21/mo | Costly |
Unattributable Unattributable | Other | 369ms | 0 KB | — | €4/mo | Costly |
www.giz.de www.giz.de | Other | 147ms | 19 KB | — | €2/mo | Optional |
www.giz.de www.giz.de | Other | 99ms | 38 KB | 67% | €1/mo | Optional |
www.giz.de www.giz.de | Other | 74ms | 97 KB | 63% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.giz.de adds 19804ms and costs ~€215/month
- www.giz.de adds 1944ms and costs ~€21/month
- Unattributable adds 369ms and costs ~€4/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 19804ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
www.giz.de takes 1944ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 369ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
63% of www.giz.de's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev