Performance

· 21 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

100

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.

268 ms

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

270 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.

0.077

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

268 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

271 ms

Page Load Progression

375 ms

750 ms

1.1 s

1.5 s

1.9 s

2.2 s

2.6 s

3.0 s

Checks

15 PASS 4 REVIEW

Image Optimization

11 images, 0 KB saveable

REVIEW

11 images, 0 KB saveable

All images are well-optimized

11 images 26 KB

0 oversized -0 KB

11 legacy format

0 missing dimensions CLS risk

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

HTTP Caching

no-cache

REVIEW

no-cache

Cache-Control header is set

Got: no-cache

Last-Modified header present

Cache-Control

no-cache

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first

A+

Page Weight Budget

111 KB transferred, 26 requests

PASS

111 KB transferred, 26 requests

Page weighs 252 KB (111 KB transferred)

26 HTTP requests

Estimated 0.02 g CO2 per page load

111 KB transferred

26 requests

0.02 g CO2 per page load

Fonts 39.7 KiB 36%

Images 26.1 KiB 24%

JavaScript 16.4 KiB 15%

Other 10.2 KiB 9%

CSS 9.9 KiB 9%

HTML 8.5 KiB 8%

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+

JS Execution Cost

142ms total JS execution

PASS

142ms total JS execution

https://www.ndmnet.eu/: 142ms CPU time

Main Thread Breakdown

Style & Layout 46% Other 39% Rendering 9% Script Evaluation 4%

Script	Total	Scripting	Parse/Compile	Party
https://www.ndmnet.eu/	142ms	5ms	0ms	1st

A+

Font Loading

4 fonts (40 KB)

PASS

4 fonts (40 KB)

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

Web fonts

40 KB total

Render-blocking

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

liberation-mono-700-lat... woff2 swap

Size 10 KB

Load time 28 ms

Start 217 ms

Risk FOUT — text flashes from fallback to web font

liberation-sans-700-lat... woff2 swap

Size 10 KB

Load time 30 ms

Start 217 ms

Risk FOUT — text flashes from fallback to web font

liberation-sans-400-lat... woff2 swap

Size 10 KB

Load time 31 ms

Start 217 ms

Risk FOUT — text flashes from fallback to web font

liberation-mono-400-lat... woff2 swap

Size 10 KB

Load time 32 ms

Start 217 ms

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

3 scripts, 0 KB unused

PASS

3 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.ndmnet.eu/assets/js/i18n/content.js?v=d29f2f8014	7 KB	—	✓	1st
https://www.ndmnet.eu/assets/js/main.js?v=6da3c7217a	3 KB	—	✓	1st
https://www.ndmnet.eu/assets/js/i18n/content.js	7 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+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

HTTP/3 (QUIC) is supported

First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.

A+

Compression Algorithm

Main response uses brotli

PASS

Main response uses brotli

Main HTML response uses brotli (Content-Encoding: br)

Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.

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-cache -- safe revalidate-on-request policy

PASS

Main HTML uses no-cache -- safe revalidate-on-request policy

Got: no-cache

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).

`Last-Modified` present -- timestamp-based conditional GET supported

Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.

A+

Page Weight Inventory

26 resources · 111 KB · 0 KB savings available

PASS

26 resources · 111 KB · 0 KB savings available

Within 1MB page-weight target

Got: 111 KB

26 resources · 110.8 KiB · 0 third-party Within 1MB page-weight target

Font 36% · 39.7 KiB

Image 33% · 36.4 KiB

JavaScript 15% · 16.4 KiB

CSS 9% · 9.9 KiB

Document 8% · 8.5 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

26 resources			110.8 KiB

Network Waterfall

26 requests over 332ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

21 images, 7 KB total, 2 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

7 KB

Oversized

Wasted

2 KB

5 missing lazy loading

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.