https://von-rakete.de
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
92
GRADE
A
FIX
1
REVIEW
5
PASS
13
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
99
88
100
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
387 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
387 ms
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.
0.051
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.22 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.
387 ms
Page Load Progression
552 ms 1.1 s
1.7 s
2.2 s
2.8 s
3.3 s
3.9 s
4.4 sChecks
2113 PASS 5 REVIEW 1 FIX
DHTTP CachingActionno-store (uncacheable)FIX
HTTP Caching
Actionno-store (uncacheable)
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-cache, no-store, private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
no-cache, no-store, private
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| private | — | Only browser cache, not CDN/proxy |
BImage Optimization10 images, 0 KB saveableREVIEW
Image Optimization
10 images, 0 KB saveable
10 images, 0 KB saveable
Info::
All images are well-optimized
10 images 211 KB
0 oversized -0 KB
10 legacy format
0 missing dimensions CLS risk
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
HTTP/3 (QUIC)
HTTP/3 not advertised
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
CCompression AlgorithmActionMain response served uncompressedREVIEW
Compression Algorithm
ActionMain response served uncompressed
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Page Weight Budget309 KB transferred, 20 requestsPASS
Page Weight Budget
309 KB transferred, 20 requests
309 KB transferred, 20 requests
Info::
Page weighs 428 KB (309 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.06 g CO2 per page load
309 KB transferred
20 requests
0.06 g CO2 per page load
Images 211.1 KiB 68%
Fonts 43.2 KiB 14%
JavaScript 42.6 KiB 14%
CSS 7.3 KiB 2%
HTML 4.1 KiB 1%
Other 667 B 0%
0 2.4 MB 4.9 MB
Under budget
A+Third-Party ImpactNo third-party resourcesPASS
Third-Party Impact
No third-party resources
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+JS Execution Cost184ms total JS executionPASS
JS Execution Cost
184ms total JS execution
184ms total JS execution
Info::
https://von-rakete.de/: 184ms CPU time
Main Thread Breakdown
Other 39% Rendering 26% Style & Layout 18% Script Evaluation 15%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://von-rakete.de/ | 184ms | 1ms | 0ms | 1st |
A+Font Loading3 fonts (43 KB)PASS
Font Loading
3 fonts (43 KB)
3 fonts (43 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
43 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
hind-siliguri-v7-latin-... woff2 swap
Size 14 KB
Load time 357 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
hind-siliguri-v7-latin-... woff2 swap
Size 14 KB
Load time 346 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
hind-siliguri-v7-latin-... woff2 swap
Size 15 KB
Load time 355 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
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+JS Bundles4 scripts, 0 KB unusedPASS
JS Bundles
4 scripts, 0 KB unused
4 scripts, 0 KB unused
0 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://von-rakete.de/assets/jquery/js/jquery.min.js?v=2e868dd8 | 30 KB | — | ✓ | 1st |
| https://von-rakete.de/assets/jquery-ui/js/jquery-ui.min.js?v=1.13.2 | 6 KB | — | ✓ | 1st |
| https://von-rakete.de/files/scripts/superfish/js/superfish.js?v=f0fc515a | 3 KB | — | ✓ | 1st |
| https://von-rakete.de/files/scripts/functions.js?v=8d3e9dbe | 4 KB | — | ✓ | 1st |
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-cache, no-store, private
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+Page Weight Inventory20 resources · 309 KB · 0 KB savings availablePASS
Page Weight Inventory
20 resources · 309 KB · 0 KB savings available
20 resources · 309 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 309 KB
20 resources · 309.0 KiB · 0 third-party Within 1MB page-weight target
Image 69% · 211.8 KiB
Font 14% · 43.2 KiB
JavaScript 14% · 42.6 KiB
CSS 2% · 7.3 KiB
Document 1% · 4.1 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 20 resources | 309.0 KiB | ||||||
Network Waterfall20 requests over 2099msINFO
Network Waterfall
20 requests over 2099ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization3 images, 134 KB total, 0 KB wastedINFO
Image Optimization
3 images, 134 KB total, 0 KB wasted
Image Optimization Audit
Total Images
3
Total Size
134 KB
2 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.