Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop

Performance

Accessibility

100

Best Practices

100

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.17 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.11 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

10 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.010

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.07 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.

2.12 s

Page Load Progression

553 ms

1.1 s

1.7 s

2.2 s

2.8 s

3.3 s

3.9 s

4.4 s

Checks

16 PASS 6 REVIEW 1 FIX

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

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

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

Image Optimization

12 images, 0 KB saveable

REVIEW

12 images, 0 KB saveable

All images are well-optimized

12 images 212 KB

0 oversized -0 KB

12 legacy format

0 missing dimensions CLS risk

JS Execution Cost

Action

1144ms total JS execution

REVIEW

1144ms total JS execution

https://von-rakete.de/: 693ms CPU time

Unattributable: 209ms CPU time

https://von-rakete.de/files/scripts/functions.js?v...: 149ms CPU time

https://von-rakete.de/assets/jquery/js/jquery.min....: 93ms CPU time

Third-party scripts: 209ms (18% of total)

Main Thread Breakdown

Other 38% Rendering 25% Style & Layout 18% Script Evaluation 16%

Script	Total	Scripting	Parse/Compile	Party
https://von-rakete.de/	693ms	6ms	2ms	1st
Unattributable	209ms	8ms	0ms	3rd
https://von-rakete.de/files/scripts/functions.js?v=8d3e9dbe	149ms	98ms	2ms	1st
https://von-rakete.de/assets/jquery/js/jquery.min.js?v=2e868dd8	93ms	59ms	13ms	1st

HTTP/3 (QUIC)

HTTP/3 not advertised

REVIEW

HTTP/3 not advertised

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.

Compression Algorithm

Action

Main response served uncompressed

REVIEW

Main response served uncompressed

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.

Server-Timing Observability

No Server-Timing header found

REVIEW

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.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Page Weight Budget

310 KB transferred, 22 requests

PASS

310 KB transferred, 22 requests

Page weighs 429 KB (310 KB transferred)

22 HTTP requests

Estimated 0.06 g CO2 per page load

310 KB transferred

22 requests

0.06 g CO2 per page load

Images 212.0 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 Impact

No third-party resources

PASS

No third-party resources

No third-party resources detected

No third-party resources detected — all resources are first-party.

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

3 fonts (43 KB)

PASS

3 fonts (43 KB)

3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

43 KB total

Render-blocking

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 350 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 367 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 367 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 Bundles

4 scripts, 0 KB unused

PASS

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 Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

No optimization needed

PASS

No optimization needed

No resource hint issues

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Main HTML Cache-Control

Main HTML uses no-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: no-cache, no-store, private

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`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).

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 Inventory

22 resources · 310 KB · 0 KB savings available

PASS

22 resources · 310 KB · 0 KB savings available

Within 1MB page-weight target

Got: 310 KB

22 resources · 309.8 KiB · 0 third-party Within 1MB page-weight target

Image 69% · 212.6 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

22 resources			309.8 KiB

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

JavaScript Blocking

1 JS blocking issue(s) detected

PASS

1 JS blocking issue(s) detected

4 render-blocking <script src> tag(s) without async/defer

Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.

A+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

Network Waterfall

22 requests over 2101ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

18% of JavaScript execution is third-party

First-party Third-party 209ms · 0KB · €2/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	209ms	0 KB	—	€2/mo	Costly

Unattributable

Other

Costly

Execution 209ms

Transfer 0 KB

Monthly Cost €2/mo

These scripts may cost more than they're worth

Unattributable adds 209ms and costs ~€2/month

Unattributable takes 209ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

Image Optimization

3 images, 134 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

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.

Browse & Analyze

Learn

Performance

Page Load Progression

Green Hosting

Font loading timeline

Optimization checklist

These scripts may cost more than they're worth

Image Optimization Audit