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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
2
REVIEW
2
PASS
10
INFO
2

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

Mobile Desktop
44
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.

6.58 s

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

9.95 s

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

318 ms

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

0.168

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

7.44 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.

10.21 s

Page Load Progression

385 ms
770 ms
1.2 s
1.5 s
1.9 s
2.3 s
2.7 s
3.1 s
Checks
16
10 PASS 2 REVIEW 2 FIX
F
JS Execution Cost
Action
3997ms total JS execution
FIX
3997ms total JS execution
Warning::
https://www.hetzner.com/: 1144ms CPU time
Warning::
https://www.hetzner.com/_resources/themes/static/d...: 1077ms CPU time
Warning::
Unattributable: 979ms CPU time
Warning::
https://www.hetzner.com/_resources/themes/hetzner/...: 385ms CPU time
Info::
https://www.hetzner.com/_resources/themes/static/d...: 228ms CPU time
Info::
Third-party scripts: 1049ms (26% of total)

Main Thread Breakdown

Script Evaluation 36% Other 28% Style & Layout 17% Script Parsing & Compilation 9% Rendering 5% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://www.hetzner.com/1144ms124ms5ms1st
https://www.hetzner.com/_resources/themes/static/dist/vendors.js?m=17750462311077ms792ms98ms1st
Unattributable979ms73ms0ms3rd
https://www.hetzner.com/_resources/themes/hetzner/dist/vendors.js?m=1775046240385ms67ms242ms1st
https://www.hetzner.com/_resources/themes/static/dist/bundle.js?m=1775046231228ms223ms1ms1st
https://www.hetzner.com/_resources/themes/hetzner/dist/app.js?m=1775046240114ms108ms3ms1st
https://use.hetzner.com/tick.js70ms48ms20ms3rd
F
JS Bundles
Action
14 scripts, 581 KB unused
FIX
14 scripts, 581 KB unused
Warning::
https://www.hetzner.com/_resources/themes/hetzner/...: 500 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: 581 KB
581 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.hetzner.com/_resources/themes/hetzner/dist/vendors.js?m=1775046240538 KB500 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
1.8 MB transferred, 89 requests
REVIEW
1.8 MB transferred, 89 requests
Info::
Page weighs 5.1 MB (1.8 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::
89 HTTP requests
Info::
Estimated 0.37 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
89 requests
0.37 g CO2 per page load
JavaScript 842.6 KiB 46%
Fonts 606.2 KiB 33%
Images 181.3 KiB 10%
CSS 146.7 KiB 8%
Other 27.2 KiB 1%
HTML 15.4 KiB 1%
Other 2.0 KiB 0%
Other 513 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
47 images, 0 KB saveable
REVIEW
47 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.
47 images 181 KB
0 oversized -0 KB
42 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

A+
Third-Party Impact
11% third-party, 0 ms blocking
PASS
11% third-party, 0 ms blocking
Info::
Third-party code accounts for 11% of page weight (208.8 KiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
89%
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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 6.6 s LCP 9.9 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/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-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/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
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-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
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+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
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
89 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
26% of JavaScript execution is third-party
First-party Third-party 1049ms · 45KB · $14/mo
Unattributable
Other
Costly
Execution 979ms
Transfer 0 KB
Monthly Cost $13/mo
use.hetzner.com
Other
Optional
Execution 70ms
Transfer 45 KB
Unused 65%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 979ms and costs ~$13/month

Unattributable takes 979ms 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

65% of use.hetzner.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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