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https://hamsterimkopf.de

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
4
PASS
15
INFO
3

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

327 ms

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

337 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.

0.035

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

402 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.

338 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
22
15 PASS 4 REVIEW
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
413 KB transferred, 14 requests
PASS
413 KB transferred, 14 requests
Info::
Page weighs 495 KB (413 KB transferred)
Info::
Fonts are 219 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 219 KB
Info::
14 HTTP requests
Info::
Estimated 0.08 g CO2 per page load
413 KB / 2.4 MB budget
413 KB transferred
14 requests
0.08 g CO2 per page load
Fonts 218.8 KiB 53%
Images 155.7 KiB 38%
HTML 18.2 KiB 4%
CSS 13.8 KiB 3%
JavaScript 5.1 KiB 1%
Other 853 B 0%
Other 688 B 0%
0 2.4 MB 4.9 MB
Under budget

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
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
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Image Optimization
5 images, 0 KB saveable
PASS
5 images, 0 KB saveable
Info::
All images are well-optimized
5 images 156 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
499ms total JS execution
PASS
499ms total JS execution
Warning::
https://hamsterimkopf.de/: 443ms CPU time
Info::
Unattributable: 56ms CPU time

Main Thread Breakdown

Style & Layout 38% Other 36% Rendering 20% Script Evaluation 3%
ScriptTotalScriptingParse/CompileParty
https://hamsterimkopf.de/443ms4ms1ms1st
Unattributable56ms3ms0ms1st
A+
Font Loading
2 fonts (219 KB)
PASS
2 fonts (219 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

219 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 327 ms LCP 337 mshttps://hamsterimkopf.de/_astro/literata-latin-opsz-normal.BHZsWIlc.woff2literata-latin-opsz-nor... https://hamsterimkopf.de/_astro/literata-latin-opsz-normal.BHZsWIlc.woff2 — 107.9 KiB — 77 ms — font-display: swaphttps://hamsterimkopf.de/_astro/literata-latin-opsz-italic.CJ93D38p.woff2literata-latin-opsz-ita... https://hamsterimkopf.de/_astro/literata-latin-opsz-italic.CJ93D38p.woff2 — 110.9 KiB — 94 ms — font-display: swap
literata-latin-opsz-nor... woff2 swap
Size 108 KB
Load time 77 ms
Start 278 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
literata-latin-opsz-ita... woff2 swap
Size 111 KB
Load time 94 ms
Start 278 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~109 KB and ~218 ms

A+
JS Bundles
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://hamsterimkopf.de/_astro/page.B3sWyS9n.js1 KB—✓1st
https://hamsterimkopf.de/_astro/Toolbox.astro_astro_type_script_index_0_lang.DEesN7h7.js4 KB—✓1st
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
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+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
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::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
A+
Page Weight Inventory
14 resources · 413 KB · 0 KB savings available
PASS
14 resources · 413 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 413 KB
Info::
1 third-party resources (0% of weight)
14 resources · 413.1 KiB · 1 third-party Within 1MB page-weight target
Font 53% · 218.8 KiB
Image 38% · 156.5 KiB
Document 4% · 18.2 KiB
CSS 3% · 13.8 KiB
JavaScript 1% · 5.1 KiB
Other 0% · 688 B
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
14 requests over 462ms
INFO
0 ms 200 ms 400 ms FCP 327 ms LCP 337 mshttps://hamsterimkopf.de// https://hamsterimkopf.de/ — 200 — 18.2 KiB — 106 ms — h2https://hamsterimkopf.de/images/cover-front.webp/images/cover-front.webp https://hamsterimkopf.de/images/cover-front.webp — 200 — 36.8 KiB — 60 ms — h2https://hamsterimkopf.de/_astro/BaseLayout.DLDZ3EDr.css/_astro/BaseLayout.DLDZ3EDr.css https://hamsterimkopf.de/_astro/BaseLayout.DLDZ3EDr.css — 200 — 9.7 KiB — 57 ms — h2https://hamsterimkopf.de/_astro/index.CjeuijoV.css/_astro/index.CjeuijoV.css https://hamsterimkopf.de/_astro/index.CjeuijoV.css — 200 — 4.1 KiB — 53 ms — h2https://hamsterimkopf.de/_astro/page.B3sWyS9n.js/_astro/page.B3sWyS9n.js https://hamsterimkopf.de/_astro/page.B3sWyS9n.js — 200 — 1.2 KiB — 54 ms — h2https://hamsterimkopf.de/images/cover-spine.webp/images/cover-spine.webp https://hamsterimkopf.de/images/cover-spine.webp — 200 — 5.3 KiB — 53 ms — h2https://hamsterimkopf.de/_astro/Toolbox.astro_astro_type_script_index_0_lang.DEesN7h7.js/_astro/Toolbox.astro_astro_type_sc... https://hamsterimkopf.de/_astro/Toolbox.astro_astro_type_script_index_0_lang.DEesN7h7.js — 200 — 3.9 KiB — 54 ms — h2https://hamsterimkopf.de/site.webmanifest/site.webmanifest https://hamsterimkopf.de/site.webmanifest — 200 — 688 B — 56 ms — h3data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke…www.w3.org/2000/svg' viewBox='0 0 2... data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke… — 200 — 0 B — 0 ms — datahttps://hamsterimkopf.de/images/cover-back.webp/images/cover-back.webp https://hamsterimkopf.de/images/cover-back.webp — 200 — 97.1 KiB — 112 ms — h3https://hamsterimkopf.de/_astro/literata-latin-opsz-normal.BHZsWIlc.woff2/_astro/literata-latin-opsz-normal.... https://hamsterimkopf.de/_astro/literata-latin-opsz-normal.BHZsWIlc.woff2 — 200 — 107.9 KiB — 77 ms — h3https://hamsterimkopf.de/_astro/literata-latin-opsz-italic.CJ93D38p.woff2/_astro/literata-latin-opsz-italic.... https://hamsterimkopf.de/_astro/literata-latin-opsz-italic.CJ93D38p.woff2 — 200 — 110.9 KiB — 94 ms — h3https://hamsterimkopf.de/images/cover-front-480.webp/images/cover-front-480.webp https://hamsterimkopf.de/images/cover-front-480.webp — 200 — 16.5 KiB — 69 ms — h3https://hamsterimkopf.de/favicon.svg/favicon.svg https://hamsterimkopf.de/favicon.svg — 200 — 853 B — 28 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
7 images, 208 KB total, 115 KB wasted
INFO

Image Optimization Audit

Total Images

7

Total Size

208 KB

Oversized

3

Wasted

115 KB

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

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