Performance
· 17 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.
2.93 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
15.42 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
735 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.659
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.12 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.
16.59 s
Page Load Progression
FPage Weight BudgetAction3.1 MB transferred, 65 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
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
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 ImpactAction98% third-party, 0 ms blockingFIX
FJS Execution CostAction3730ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://sedo.com/us/ | 864ms | 47ms | 3ms | 1st |
| Unattributable | 748ms | 168ms | 0ms | 3rd |
| https://app.usercentrics.eu/browser-ui/3.98.0/index.module.js | 542ms | 355ms | 9ms | 3rd |
| https://sedo.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 419ms | 402ms | 5ms | 1st |
| https://cdn.sedo.com/_assets/d5f4f9fe5665dde1fdba78c27ad6d88f/dist/js/typo3/app.min.js?1775030586 | 257ms | 199ms | 31ms | 3rd |
| https://cdn.sedo.com/components/p9HJ4M2Uz7U4/full.header.min.js | 194ms | 106ms | 63ms | 3rd |
| https://cdn.sedo.com/c7r/assets/static/dist/js/deprecated/typescript/static/app.min.js | 148ms | 102ms | 38ms | 3rd |
| https://cdn.sedo.com/components/TfcP3WYRyZ9A/cookie-banner.min.js | 145ms | 138ms | 2ms | 3rd |
| https://cdn.sedo.com/components/zkLxDsbw1hz2/full.footer.min.js | 144ms | 78ms | 50ms | 3rd |
| https://cdn.sedo.com/fileadmin_git/resources/public/JavaScripts/jquery-3.7.1.min.js?1775030586 | 115ms | 83ms | 12ms | 3rd |
Showing top 10 of 12 scripts
DPage Weight InventoryAction65 resources · 3.1 MB · 166 KB savings availableFIX
~165.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 65 resources | 3.1 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization16 images, 0 KB saveableREVIEW
CJS BundlesAction23 scripts, 166 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.sedo.com/c7r/assets/static/libs/external/jquery-ui.min.js | 67 KB | 58 KB (87%) | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.98.0/index.module.js | 121 KB | 54 KB (44%) | ✓ | 3rd |
| https://cdn.sedo.com/_assets/d5f4f9fe5665dde1fdba78c27ad6d88f/dist/js/typo3/app.min.js?1775030586 | 42 KB | 27 KB (66%) | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.98.0/VirtualServiceItem-cdefa7af.js | 49 KB | 26 KB (54%) | ✓ | 3rd |
| https://sedo.com/cdn-cgi/challenge-platform/h/g/scripts/jsd/b0a7532ac8ec/main.js? | 12 KB | — | ✓ | 1st |
| https://app.usercentrics.eu/browser-ui/3.98.0/DefaultUI-58678d3a-faab85ea.js | 1 KB | — | ✓ | 3rd |
| https://cdn.sedo.com/components/zkLxDsbw1hz2/full.footer.min.js | 76 KB | — | ✓ | 3rd |
| https://cdn.sedo.com/fileadmin_git/resources/public/JavaScripts/splide.min.js?1775030586 | 13 KB | — | ✓ | 3rd |
| https://widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js | 8 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/latest/loader.js | 11 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (809 KB)PASS
Web fonts
5
809 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~596 KB and ~1192 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall65 requests over 3273msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 748ms | 0 KB | — | $4/mo | Costly |
app.usercentrics.eu app.usercentrics.eu | Other | 542ms | 121 KB | 44% | $3/mo | Costly |
cdn.sedo.com cdn.sedo.com | Other | 257ms | 42 KB | 66% | $1/mo | Costly |
cdn.sedo.com cdn.sedo.com | Other | 194ms | 93 KB | — | $1/mo | Optional |
cdn.sedo.com cdn.sedo.com | Other | 148ms | 58 KB | — | $1/mo | Optional |
cdn.sedo.com cdn.sedo.com | Other | 145ms | 3 KB | — | $1/mo | Optional |
cdn.sedo.com cdn.sedo.com | Other | 144ms | 76 KB | — | $1/mo | Optional |
cdn.sedo.com cdn.sedo.com | Other | 115ms | 30 KB | — | $1/mo | Optional |
cdn.sedo.com cdn.sedo.com | Other | 96ms | 67 KB | 87% | $1/mo | Optional |
app.usercentrics.eu app.usercentrics.eu | Other | 57ms | 11 KB | — | $0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 748ms and costs ~$4/month
- app.usercentrics.eu adds 542ms and costs ~$3/month
- cdn.sedo.com adds 257ms and costs ~$1/month
66% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
Unattributable takes 748ms 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
app.usercentrics.eu takes 542ms 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
cdn.sedo.com takes 257ms 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
66% of cdn.sedo.com'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
87% of cdn.sedo.com'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