Performance
· 23 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.
1.65 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.08 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
28 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.
2.83 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.
2.17 s
Page Load Progression
FPage Weight BudgetAction5.5 MB transferred, 73 requestsFIX
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction73 resources · 5.5 MB · 146 KB savings availableFIX
~146.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 73 resources | 5.5 MiB | ||||||
BImage Optimization25 images, 0 KB saveableREVIEW
BJS Execution Cost926ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://sdp.eu.usercentrics.eu/latest/uc-block.bundle.js | 252ms | 240ms | 4ms | 3rd |
| Unattributable | 249ms | 13ms | 0ms | 1st |
| https://www.rheinmetall.com/de | 205ms | 33ms | 17ms | 3rd |
| https://www.rheinmetall.com/_nuxt/097815e.modern.js | 101ms | 69ms | 0ms | 3rd |
| https://web.eu1.cmp.usercentrics.eu/ui/v/4.20.0/WebSdk.lib.8e67814b.js | 60ms | 44ms | 14ms | 3rd |
| https://web.eu1.cmp.usercentrics.eu/ui/TvGdprCmpView.f7414e25.js | 58ms | 17ms | 3ms | 3rd |
BJS Bundles28 scripts, 146 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.rheinmetall.com/_nuxt/ddc5f93.modern.js | 92 KB | 62 KB (67%) | ✓ | 3rd |
| https://web.eu1.cmp.usercentrics.eu/ui/v/4.20.0/WebSdk.lib.8e67814b.js | 62 KB | 39 KB (65%) | ✓ | 3rd |
| https://www.rheinmetall.com/_nuxt/097815e.modern.js | 70 KB | 23 KB (33%) | ✓ | 3rd |
| https://www.rheinmetall.com/_nuxt/20e714b.modern.js | 37 KB | 22 KB (61%) | ✓ | 3rd |
| https://www.rheinmetall.com/_nuxt/bd91ce3.modern.js | 8 KB | — | ✓ | 3rd |
| https://www.rheinmetall.com/_nuxt/2bea337.modern.js | 1 KB | — | ✓ | 3rd |
| https://www.rheinmetall.com/_nuxt/9a7c449.modern.js | 3 KB | — | ✓ | 3rd |
| https://web.eu1.cmp.usercentrics.eu/ui/loader.js | 22 KB | — | ✓ | 3rd |
| https://www.rheinmetall.com/_nuxt/0966541.modern.js | 1 KB | — | ✓ | 3rd |
| https://www.rheinmetall.com/_nuxt/218e744.modern.js | 1 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CDocument CompressionActionDocument response served uncompressedREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingno-cacheREVIEW
no-cache
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (154 KB)PASS
Web fonts
5
154 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
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 ~46 KB and ~92 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Asset CompressionAll 1 asset host use brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-cache -- safe revalidate-on-request policyPASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
Network Waterfall73 requests over 2426msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
sdp.eu.usercentrics.eu sdp.eu.usercentrics.eu | Other | 252ms | 34 KB | — | CHF4/mo | Costly |
www.rheinmetall.com www.rheinmetall.com | Other | 205ms | 83 KB | — | CHF3/mo | Costly |
www.rheinmetall.com www.rheinmetall.com | Other | 101ms | 70 KB | 33% | CHF2/mo | Optional |
web.eu1.cmp.usercentrics.eu web.eu1.cmp.usercentrics.eu | Other | 60ms | 62 KB | 65% | CHF1/mo | Optional |
web.eu1.cmp.usercentrics.eu web.eu1.cmp.usercentrics.eu | Other | 58ms | 35 KB | — | CHF1/mo | Optional |
These scripts may cost more than they're worth
- sdp.eu.usercentrics.eu adds 252ms and costs ~CHF4/month
- www.rheinmetall.com adds 205ms and costs ~CHF3/month
73% 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
sdp.eu.usercentrics.eu takes 252ms 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.rheinmetall.com takes 205ms 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 web.eu1.cmp.usercentrics.eu'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
Image Optimization26 images, 53 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
26
Total Size
53 KB