Performance
· 22 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.
1.89 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.41 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 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.
2.76 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.
2.41 s
Page Load Progression
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BThird-Party Impact54% third-party, 0 ms blockingREVIEW
BJS Bundles13 scripts, 82 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://app.usercentrics.eu/browser-ui/3.104.0/index.module.js | 121 KB | 55 KB (45%) | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.104.0/VirtualServiceItem-21018cfe.js | 50 KB | 28 KB (55%) | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.104.0/SecondLayerUI-f3983f56-70019835.js | 0 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.104.0/DefaultUI-998eb6d2-b7c1bd59.js | 1 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.104.0/FirstLayerCustomization-c46926e5-1b584b82.js | 1 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.104.0/ButtonsCustomization-cfeb1c62-d1e33932.js | 0 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/latest/loader.js | 11 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.104.0/PrivacyButton-0622a241.js | 2 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.104.0/index-bf77356f.js | 1 KB | — | ✓ | 3rd |
| https://app.usercentrics.eu/browser-ui/3.104.0/index-5538ac27.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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Page Weight Budget386 KB transferred, 35 requestsPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization7 images, 0 KB saveablePASS
A+JS Execution Cost428ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 168ms | 67ms | 0ms | 1st |
| https://app.usercentrics.eu/browser-ui/3.104.0/index.module.js | 161ms | 116ms | 1ms | 3rd |
| https://www.evergabe.com/en/ | 99ms | 3ms | 1ms | 1st |
A+Font Loading2 fonts (104 KB)PASS
Web fonts
2
104 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
- 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 ~31 KB and ~62 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
APage Weight Inventory35 resources · 386 KB · 82 KB savings availablePASS
~82.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 35 resources | 386.3 KiB | ||||||
Network Waterfall35 requests over 4233msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
app.usercentrics.eu app.usercentrics.eu | Other | 161ms | 121 KB | 45% | €2/mo | Optional |
Image Optimization2 images, 16 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
2
Total Size
16 KB