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.
907 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.19 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
277 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.006
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.77 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.
2.58 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2479ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.goethe.de/i97lSv/o/J/D4ixQlngzmt-/bpi1XSV3/Hj9UbhhbAQ/Sk5gchJ0/djAPAg?v=88940a67-a057-3d60-4fe8-0f1100c30210 | 498ms | 457ms | 19ms | 3rd |
| Unattributable | 438ms | 111ms | 0ms | 3rd |
| https://privacy-proxy.usercentrics.eu/latest/uc-block.bundle.js | 417ms | 368ms | 4ms | 3rd |
| https://www.goethe.de/de/index.html | 335ms | 72ms | 5ms | 3rd |
| https://app.usercentrics.eu/browser-ui/3.98.1/index.module.js | 197ms | 141ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W3QG49 | 182ms | 139ms | 35ms | 3rd |
| https://www.goethe.de/resources/js/goethe.support.gimin.js | 102ms | 60ms | 1ms | 3rd |
| https://www.goethe.de/resources/js/jquery-3.6.3.min.js | 97ms | 48ms | 4ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1045675900&cx=c>m=4e64h1 | 80ms | 62ms | 16ms | 3rd |
| https://www.goethe.de/resources/relaunch/js/responsive-header-v3.gimin.js | 70ms | 21ms | 1ms | 3rd |
Showing top 10 of 11 scripts
DJS BundlesAction34 scripts, 303 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-W3QG49 | 175 KB | 69 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1045675900&cx=c>m=4e64h1 | 137 KB | 65 KB (48%) | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.98.1/index.module.js | 121 KB | 54 KB (44%) | ✓ | 3rd |
| https://www.goethe.de/i97lSv/o/J/D4ixQlngzmt-/bpi1XSV3/Hj9UbhhbAQ/Sk5gchJ0/djAPAg?v=88940a67-a057-3d60-4fe8-0f1100c30210 | 0 KB | 31 KB (20%) | ✓ | 3rd |
| https://www.goethe.de/i97lSv/o/J/D4ixQlngzmt-/bpi1XSV3/Hj9UbhhbAQ/Sk5gchJ0/djAPAg?v=88940a67-a057-3d60-4fe8-0f1100c30210 | 150 KB | 31 KB (20%) | ✓ | 3rd |
| https://www.goethe.de/resources/relaunch/js/swiper/swiper-bundle.min.js | 42 KB | 28 KB (67%) | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.98.1/VirtualServiceItem-b82c2a99.js | 49 KB | 26 KB (54%) | ✓ | 3rd |
| https://www.goethe.de/resources/js/header-search.gimin.js | 9 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.98.1/ButtonsCustomization-6135b8b0-75588c21.js | 0 KB | — | ✓ | 3rd |
| https://www.goethe.de/resources/relaunch/js/responsive-header-v3.gimin.js | 3 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 InventoryAction90 resources · 1.6 MB · 303 KB savings availableFIX
~303.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 90 resources | 1.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.6 MB transferred, 90 requestsREVIEW
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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
BImage Optimization22 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (214 KB)PASS
Web fonts
4
214 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall90 requests over 4852msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.goethe.de www.goethe.de | Other | 498ms | 0 KB | 20% | €5/mo | Costly |
Unattributable Unattributable | Other | 438ms | 0 KB | — | €5/mo | Costly |
privacy-proxy.usercentrics.eu privacy-proxy.usercentrics.eu | Other | 417ms | 30 KB | — | €5/mo | Costly |
www.goethe.de www.goethe.de | Other | 335ms | 43 KB | — | €4/mo | Costly |
app.usercentrics.eu app.usercentrics.eu | Other | 197ms | 121 KB | 44% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 182ms | 175 KB | 40% | €2/mo | Optional |
www.goethe.de www.goethe.de | Other | 102ms | 9 KB | — | €1/mo | Optional |
www.goethe.de www.goethe.de | Other | 97ms | 31 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 80ms | 137 KB | 48% | €1/mo | Optional |
www.goethe.de www.goethe.de | Other | 70ms | 3 KB | — | €1/mo | Optional |
www.goethe.de www.goethe.de | Other | 63ms | 3 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.goethe.de adds 498ms and costs ~€5/month
- Unattributable adds 438ms and costs ~€5/month
- privacy-proxy.usercentrics.eu adds 417ms and costs ~€5/month
- www.goethe.de adds 335ms 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.goethe.de takes 498ms 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 438ms 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
privacy-proxy.usercentrics.eu takes 417ms 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
www.goethe.de takes 335ms 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