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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
1
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
66
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

1.40 s

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

4.05 s

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

12 ms

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

0.041

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

3.61 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.

4.15 s

Page Load Progression

690 ms
1.4 s
2.1 s
2.8 s
3.4 s
4.1 s
4.8 s
5.5 s
Checks
14
8 PASS 3 REVIEW 1 FIX
F
JS Bundles
Action
14 scripts, 582 KB unused
FIX
14 scripts, 582 KB unused
Warning::
https://www.hetzner.com/_resources/themes/hetzner/...: 501 KB unused (95%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.hetzner.com/_resources/themes/static/d...: 52 KB unused (22%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://use.hetzner.com/tick.js: 29 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 582 KB
582 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.hetzner.com/_resources/themes/hetzner/dist/vendors.js?m=1775046240538 KB501 KB (95%)✓1st
https://www.hetzner.com/_resources/themes/static/dist/vendors.js?m=1775046231240 KB52 KB (22%)✓1st
https://use.hetzner.com/tick.js45 KB29 KB (65%)✓3rd
https://www.hetzner.com/_resources/themes/static/dist/bundle.js?m=17750462312 KB—✓1st
https://www.hetzner.com/_resources/themes/hetzner/dist/app.js?m=17750462407 KB—✓1st
https://www.hetzner.com/_resources/themes/languages/javascript/static/lang/de.js?m=17750461901 KB—✓1st
https://www.hetzner.com/_resources/vendor/silverstripe/admin/client/dist/js/i18n.js?m=17720248561 KB—✓1st
https://www.hetzner.com/_resources/themes/hetzner/dist/initmodal.js?m=17750462402 KB—✓1st
https://www.hetzner.com/_resources/themes/hetzner/dist/serverBoerseTimer.js?m=17750462402 KB—✓1st
https://www.hetzner.com/_resources/themes/hetzner/dist/startPageSwiper.js?m=17750462401 KB—✓1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Page Weight Budget
Action
2.0 MB transferred, 90 requests
REVIEW
2.0 MB transferred, 90 requests
Info::
Page weighs 5.4 MB (2.0 MB transferred)
Warning::
JavaScript is 843 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 843 KB
Info::
Fonts are 606 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 606 KB
Info::
90 HTTP requests
Info::
Estimated 0.43 g CO2 per page load
2.0 MB / 2.4 MB budget
2.0 MB transferred
90 requests
0.43 g CO2 per page load
JavaScript 842.6 KiB 40%
Fonts 606.2 KiB 29%
Images 447.1 KiB 21%
CSS 146.7 KiB 7%
Other 27.2 KiB 1%
HTML 15.4 KiB 1%
Other 2.0 KiB 0%
Other 536 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

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

C
Image Optimization
Action
48 images, 0 KB saveable
REVIEW
48 images, 0 KB saveable
Warning::
https://www.hetzner.com/_resources/themes/hetzner/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hetzner.com/_resources/themes/hetzner/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hetzner.com/_resources/themes/hetzner/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hetzner.com/_resources/themes/hetzner/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hetzner.com/_resources/themes/hetzner/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.hetzner.com/_resources/themes/hetzner/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
48 images 447 KB
0 oversized -0 KB
43 legacy format
6 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1163ms total JS execution
REVIEW
1163ms total JS execution
Warning::
https://www.hetzner.com/: 458ms CPU time
Warning::
https://www.hetzner.com/_resources/themes/static/d...: 297ms CPU time
Warning::
Unattributable: 262ms CPU time
Info::
https://www.hetzner.com/_resources/themes/hetzner/...: 88ms CPU time
Info::
https://www.hetzner.com/_resources/themes/static/d...: 59ms CPU time
Info::
Third-party scripts: 262ms (22% of total)

Main Thread Breakdown

Other 29% Script Evaluation 29% Style & Layout 22% Script Parsing & Compilation 8% Rendering 7% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://www.hetzner.com/458ms36ms2ms1st
https://www.hetzner.com/_resources/themes/static/dist/vendors.js?m=1775046231297ms172ms26ms1st
Unattributable262ms19ms0ms3rd
https://www.hetzner.com/_resources/themes/hetzner/dist/vendors.js?m=177504624088ms17ms62ms1st
https://www.hetzner.com/_resources/themes/static/dist/bundle.js?m=177504623159ms58ms0ms1st
A+
Third-Party Impact
18% third-party, 0 ms blocking
PASS
18% third-party, 0 ms blocking
Info::
Third-party code accounts for 18% of page weight (378.4 KiB of 2.0 MiB)
Info::
Third-party blocking time is low (0 ms)
82%
18%
First-party Third-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+
Font Loading
7 fonts (606 KB)
PASS
7 fonts (606 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

606 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.4 s LCP 4.1 shttps://www.hetzner.com/_resources/themes/general/dist/fonts/montserrat-v10-latin-500.woff2montserrat-v10-latin-50... https://www.hetzner.com/_resources/themes/general/dist/fonts/montserrat-v10-latin-500.woff2 — 15.4 KiB — 0 ms — font-display: swaphttps://www.hetzner.com/_resources/themes/general/dist/fonts/fa-solid-900.woff2fa-solid-900.woff2 https://www.hetzner.com/_resources/themes/general/dist/fonts/fa-solid-900.woff2 — 154.9 KiB — 0 ms — font-display: swaphttps://www.hetzner.com/_resources/themes/general/dist/fonts/Inter-Regular.woff2Inter-Regular.woff2 https://www.hetzner.com/_resources/themes/general/dist/fonts/Inter-Regular.woff2 — 96.9 KiB — 0 ms — font-display: swaphttps://www.hetzner.com/_resources/themes/general/dist/fonts/Inter-Medium.woff2Inter-Medium.woff2 https://www.hetzner.com/_resources/themes/general/dist/fonts/Inter-Medium.woff2 — 103.8 KiB — 0 ms — font-display: swaphttps://www.hetzner.com/_resources/themes/general/dist/fonts/fa-brands-400.woff2fa-brands-400.woff2 https://www.hetzner.com/_resources/themes/general/dist/fonts/fa-brands-400.woff2 — 116.3 KiB — 0 ms — font-display: swaphttps://www.hetzner.com/_resources/themes/general/dist/fonts/montserrat-v10-latin-300.woff2montserrat-v10-latin-30... https://www.hetzner.com/_resources/themes/general/dist/fonts/montserrat-v10-latin-300.woff2 — 15.3 KiB — 0 ms — font-display: swaphttps://www.hetzner.com/_resources/themes/general/dist/fonts/Inter-SemiBold.woff2Inter-SemiBold.woff2 https://www.hetzner.com/_resources/themes/general/dist/fonts/Inter-SemiBold.woff2 — 103.7 KiB — 0 ms — font-display: swap
montserrat-v10-latin-50... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 155 KB
Load time 0 ms
Start 0 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
Inter-Regular.woff2 woff2 swap
Size 97 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Inter-Medium.woff2 woff2 swap
Size 104 KB
Load time 0 ms
Start 0 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
fa-brands-400.woff2 woff2 swap
Size 116 KB
Load time 0 ms
Start 0 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
montserrat-v10-latin-30... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Inter-SemiBold.woff2 woff2 swap
Size 104 KB
Load time 0 ms
Start 0 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 ~239 KB and ~478 ms

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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

A+
HTTP Caching
max-age=60 (1 minute)
PASS
max-age=60 (1 minute)
Info::
Cache-Control header is set
Got: public, must-revalidate, max-age=60
Info::
Effective TTL: 1 minute (max-age=60)
Info::
Last-Modified header present
Cache-Control

public, must-revalidate, max-age=60

DirectiveValueMeaning
public—Any cache may store this response
must-revalidate—Must recheck with server after expiry
max-age60Cache for 1 minute
Effective TTL: 60 seconds
Network Waterfall
90 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
22% of JavaScript execution is third-party
First-party Third-party 262ms · 0KB · $3/mo
Unattributable
Other
Costly
Execution 262ms
Transfer 0 KB
Monthly Cost $3/mo

These scripts may cost more than they're worth

  • Unattributable adds 262ms and costs ~$3/month

Unattributable takes 262ms 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

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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