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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
57
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.
92
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.

4.49 s

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

11.95 s

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

195 ms

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

0.000

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

6.47 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.

12.14 s

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
17
8 PASS 4 REVIEW 3 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.7 MiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
52 resources · 1.7 MB · 190 KB savings available
FIX
52 resources · 1.7 MB · 190 KB savings available
Warning::
Page weight 684 KB over 1MB target
Got: 1.7 MB Expected: ≤ 1 MB
Info::
~190 KB of savings available
Warning::
51 third-party resources (100% of weight)
Info::
1 resources over 200KB
52 resources · 1.7 MiB · 51 third-party 684.0 KiB over 1MB target
Image 55% · 945.6 KiB
JavaScript 34% · 584.1 KiB
Font 5% · 83.3 KiB
CSS 3% · 58.6 KiB
Document 2% · 32.6 KiB
Other 0% · 3.8 KiB

~190.2 KiB of savings available

Remove unused JavaScript: 190.2 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Page Weight Budget
Action
1.7 MB transferred, 52 requests
REVIEW
1.7 MB transferred, 52 requests
Info::
Page weighs 3.1 MB (1.7 MB transferred)
Warning::
JavaScript is 584 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 584 KB
Info::
52 HTTP requests
Info::
Estimated 0.35 g CO2 per page load
1.7 MB / 2.4 MB budget
1.7 MB transferred
52 requests
0.35 g CO2 per page load
Images 740.5 KiB 43%
JavaScript 584.1 KiB 34%
Other 205.1 KiB 12%
Fonts 83.3 KiB 5%
CSS 58.6 KiB 3%
HTML 32.4 KiB 2%
Other 3.8 KiB 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

C
JS Execution Cost
Action
1439ms total JS execution
REVIEW
1439ms total JS execution
Warning::
https://data.eur.nl/gjdvkyynl3?p=fdee14f244f00ced3...: 360ms CPU time
Warning::
Unattributable: 321ms CPU time
Warning::
https://data.eur.nl/gjdvkyynl3.js?tg=TGXDGTQ: 254ms CPU time
Warning::
https://www.eur.nl/sites/corporate/files/js/js_MLN...: 252ms CPU time
Info::
https://consent.studio/www.eur.nl/banner.js: 106ms CPU time
Warning::
Third-party scripts: 1439ms (100% of total)

Main Thread Breakdown

Script Evaluation 49% Other 22% Style & Layout 13% Script Parsing & Compilation 9% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://data.eur.nl/gjdvkyynl3?p=fdee14f244f00ced33454881%3A79c57c7cf308a88cef35b6a5575199e9e25dc31dc958454560f1b72ce354047177157cd4144abc3f143e8ab9eaaabef40ac8b983b31e3d32360ms310ms46ms3rd
Unattributable321ms9ms0ms3rd
https://data.eur.nl/gjdvkyynl3.js?tg=TGXDGTQ254ms199ms49ms3rd
https://www.eur.nl/sites/corporate/files/js/js_MLNkSycuaM9Zkm1BCvAInYkD97ultS5Ur8JsVhFn-CA.js?scope=header&delta=0&language=nl&theme=corporate&include=eJx1keuSgyAMhV9I5ZGYFCKmomFCdNu332i7u8yO_QFCvlwOx8BSWEDRBV4Kr7hqHSAElki8duEKR4LM6ZqtsFMCtdp-5Bx50-u8woV3lGtYdYvP4w6CTQZmXE5OC6RLsFNEbsHWThgpK0qvnFJuy4t1M0W29_iwjBVyn2md63WOYDWhlfYPPWoQzvkDM4E3kGu4E35ZVPsJKU2tcVVlC7rZ5GFkNomdvcwHU2HP9oddxM7mUtE34ZmwCLvfk0-6-DBhmH-qt6q8uDCxNbEeNqf6m1A0axuukBKKec5nNIJChieKw_2w_AwWS2Bzjer5592_ezdCcLYGW-3Zl7wl-sMLyHyvPsS1O6yo7twHuMPjFfDH0U9kwuTp3t9v5pAV3w252ms97ms5ms3rd
https://consent.studio/www.eur.nl/banner.js106ms55ms17ms3rd
https://www.eur.nl/78ms3ms0ms3rd
https://www.eur.nl/sites/corporate/files/js/js_azOI-UzUW2Y0OP43fKXJTwrNiq4hWcGH1lGvbACD2Hs.js?scope=footer&delta=1&language=nl&theme=corporate&include=eJx1keuSgyAMhV9I5ZGYFCKmomFCdNu332i7u8yO_QFCvlwOx8BSWEDRBV4Kr7hqHSAElki8duEKR4LM6ZqtsFMCtdp-5Bx50-u8woV3lGtYdYvP4w6CTQZmXE5OC6RLsFNEbsHWThgpK0qvnFJuy4t1M0W29_iwjBVyn2md63WOYDWhlfYPPWoQzvkDM4E3kGu4E35ZVPsJKU2tcVVlC7rZ5GFkNomdvcwHU2HP9oddxM7mUtE34ZmwCLvfk0-6-DBhmH-qt6q8uDCxNbEeNqf6m1A0axuukBKKec5nNIJChieKw_2w_AwWS2Bzjer5592_ezdCcLYGW-3Zl7wl-sMLyHyvPsS1O6yo7twHuMPjFfDH0U9kwuTp3t9v5pAV3w68ms22ms7ms3rd
C
JS Bundles
Action
14 scripts, 190 KB unused
REVIEW
14 scripts, 190 KB unused
Warning::
https://data.eur.nl/gjdvkyynl3.js?tg=TGXDGTQ: 91 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://data.eur.nl/gjdvkyynl3?p=fdee14f244f00ced3...: 57 KB unused (32%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.eur.nl/core/assets/vendor/jquery/jquer...: 42 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 190 KB
190 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://data.eur.nl/gjdvkyynl3.js?tg=TGXDGTQ197 KB91 KB (46%)✓3rd
https://data.eur.nl/gjdvkyynl3?p=fdee14f244f00ced33454881%3A79c57c7cf308a88cef35b6a5575199e9e25dc31dc958454560f1b72ce354047177157cd4144abc3f143e8ab9eaaabef40ac8b983b31e3d32179 KB57 KB (32%)✓3rd
https://www.eur.nl/core/assets/vendor/jquery/jquery.min.js?v=4.0.077 KB42 KB (55%)✓3rd
https://www.eur.nl/sites/corporate/files/js/js_MLNkSycuaM9Zkm1BCvAInYkD97ultS5Ur8JsVhFn-CA.js?scope=header&delta=0&language=nl&theme=corporate&include=eJx1keuSgyAMhV9I5ZGYFCKmomFCdNu332i7u8yO_QFCvlwOx8BSWEDRBV4Kr7hqHSAElki8duEKR4LM6ZqtsFMCtdp-5Bx50-u8woV3lGtYdYvP4w6CTQZmXE5OC6RLsFNEbsHWThgpK0qvnFJuy4t1M0W29_iwjBVyn2md63WOYDWhlfYPPWoQzvkDM4E3kGu4E35ZVPsJKU2tcVVlC7rZ5GFkNomdvcwHU2HP9oddxM7mUtE34ZmwCLvfk0-6-DBhmH-qt6q8uDCxNbEeNqf6m1A0axuukBKKec5nNIJChieKw_2w_AwWS2Bzjer5592_ezdCcLYGW-3Zl7wl-sMLyHyvPsS1O6yo7twHuMPjFfDH0U9kwuTp3t9v5pAV3w26 KB—✓3rd
https://www.eur.nl/sites/corporate/files/js/js_azOI-UzUW2Y0OP43fKXJTwrNiq4hWcGH1lGvbACD2Hs.js?scope=footer&delta=1&language=nl&theme=corporate&include=eJx1keuSgyAMhV9I5ZGYFCKmomFCdNu332i7u8yO_QFCvlwOx8BSWEDRBV4Kr7hqHSAElki8duEKR4LM6ZqtsFMCtdp-5Bx50-u8woV3lGtYdYvP4w6CTQZmXE5OC6RLsFNEbsHWThgpK0qvnFJuy4t1M0W29_iwjBVyn2md63WOYDWhlfYPPWoQzvkDM4E3kGu4E35ZVPsJKU2tcVVlC7rZ5GFkNomdvcwHU2HP9oddxM7mUtE34ZmwCLvfk0-6-DBhmH-qt6q8uDCxNbEeNqf6m1A0axuukBKKec5nNIJChieKw_2w_AwWS2Bzjer5592_ezdCcLYGW-3Zl7wl-sMLyHyvPsS1O6yo7twHuMPjFfDH0U9kwuTp3t9v5pAV3w22 KB—✓3rd
https://cdnjs.cloudflare.com/ajax/libs/mark.js/8.11.1/jquery.mark.min.js5 KB—✓3rd
https://www.eur.nl/sites/corporate/files/js/js_fUCzectxpENjYAQ29Y_KigxtiNEwemr_y3X2dFSkJxQ.js?scope=footer&delta=3&language=nl&theme=corporate&include=eJx1keuSgyAMhV9I5ZGYFCKmomFCdNu332i7u8yO_QFCvlwOx8BSWEDRBV4Kr7hqHSAElki8duEKR4LM6ZqtsFMCtdp-5Bx50-u8woV3lGtYdYvP4w6CTQZmXE5OC6RLsFNEbsHWThgpK0qvnFJuy4t1M0W29_iwjBVyn2md63WOYDWhlfYPPWoQzvkDM4E3kGu4E35ZVPsJKU2tcVVlC7rZ5GFkNomdvcwHU2HP9oddxM7mUtE34ZmwCLvfk0-6-DBhmH-qt6q8uDCxNbEeNqf6m1A0axuukBKKec5nNIJChieKw_2w_AwWS2Bzjer5592_ezdCcLYGW-3Zl7wl-sMLyHyvPsS1O6yo7twHuMPjFfDH0U9kwuTp3t9v5pAV3w21 KB—✓3rd
https://www.eur.nl/modules/custom/eur_custom/js/taggers.io.js?v=1.x1 KB—✓3rd
https://consent.studio/www.eur.nl/banner.js38 KB—✓3rd
https://www.eur.nl/sites/corporate/files/js/js_7SPyGCFvNyNgWnRFnTivYX3JCk7hKdkEme55Ql23Q7s.js?scope=header&delta=2&language=nl&theme=corporate&include=eJx1keuSgyAMhV9I5ZGYFCKmomFCdNu332i7u8yO_QFCvlwOx8BSWEDRBV4Kr7hqHSAElki8duEKR4LM6ZqtsFMCtdp-5Bx50-u8woV3lGtYdYvP4w6CTQZmXE5OC6RLsFNEbsHWThgpK0qvnFJuy4t1M0W29_iwjBVyn2md63WOYDWhlfYPPWoQzvkDM4E3kGu4E35ZVPsJKU2tcVVlC7rZ5GFkNomdvcwHU2HP9oddxM7mUtE34ZmwCLvfk0-6-DBhmH-qt6q8uDCxNbEeNqf6m1A0axuukBKKec5nNIJChieKw_2w_AwWS2Bzjer5592_ezdCcLYGW-3Zl7wl-sMLyHyvPsS1O6yo7twHuMPjFfDH0U9kwuTp3t9v5pAV3w2 KB—✓3rd

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
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
24 images, 0 KB saveable
PASS
24 images, 0 KB saveable
Info::
All images are well-optimized
24 images 741 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
4 fonts (83 KB)
PASS
4 fonts (83 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

83 KB total

Render-blocking

0

of 4

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 12.0 s FCP 4.5 s LCP 12.0 shttps://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-300-webfont.woff2museosans-300-webfont.w... https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-300-webfont.woff2 — 20.8 KiB — 135 ms — font-display: swaphttps://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-500-webfont.woff2museosans-500-webfont.w... https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-500-webfont.woff2 — 20.9 KiB — 133 ms — font-display: swaphttps://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-700-webfont.woff2museosans-700-webfont.w... https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-700-webfont.woff2 — 20.9 KiB — 141 ms — font-display: swaphttps://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-900-webfont.woff2museosans-900-webfont.w... https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-900-webfont.woff2 — 20.7 KiB — 141 ms — font-display: swap
museosans-300-webfont.w... woff2 swap
Size 21 KB
Load time 135 ms
Start 246 ms
Risk FOUT — text flashes from fallback to web font
museosans-500-webfont.w... woff2 swap
Size 21 KB
Load time 133 ms
Start 247 ms
Risk FOUT — text flashes from fallback to web font
museosans-700-webfont.w... woff2 swap
Size 21 KB
Load time 141 ms
Start 247 ms
Risk FOUT — text flashes from fallback to web font
museosans-900-webfont.w... woff2 swap
Size 21 KB
Load time 141 ms
Start 247 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+
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
5 hints, 0 missing preconnects
PASS
5 hints, 0 missing preconnects
Info::
Page uses 5 resource hint(s)

Current Resource Hints

preconnect
—
preload
5
dns-prefetch
—
prefetch
—

5 resource hints configured

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
Network Waterfall
52 requests over 1854ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 4.5 s LCP 12.0 shttps://eur.nl// https://eur.nl/ — 301 — 128 B — 112 ms — http/1.1https://www.eur.nl/www.eur.nl/ https://www.eur.nl/ — 200 — 32.4 KiB — 154 ms — http/1.1https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-300-webfont.woff2www.eur.nl/themes/custom/corporate/... https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-300-webfont.woff2 — 200 — 20.8 KiB — 135 ms — http/1.1https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-500-webfont.woff2www.eur.nl/themes/custom/corporate/... https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-500-webfont.woff2 — 200 — 20.9 KiB — 133 ms — http/1.1https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-700-webfont.woff2www.eur.nl/themes/custom/corporate/... https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-700-webfont.woff2 — 200 — 20.9 KiB — 141 ms — http/1.1https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-900-webfont.woff2www.eur.nl/themes/custom/corporate/... https://www.eur.nl/themes/custom/corporate/dist/fonts/museosans-900-webfont.woff2 — 200 — 20.7 KiB — 141 ms — http/1.1https://www.eur.nl/system/files/styles/responsive_w750_r21_8/private/lytho/67b4b784a4616e31866f3fbb-1.jpg.avif?h=6f9a23ba&itok=rC9vv-79www.eur.nl/system/files/styles/resp... https://www.eur.nl/system/files/styles/responsive_w750_r21_8/private/lytho/67b4b784a4616e31866f3fbb-1.jpg.avif?h=6f9a23ba&itok=rC9vv-79 — 200 — 50.6 KiB — 288 ms — http/1.1https://www.eur.nl/sites/corporate/files/js/js_MLNkSycuaM9Zkm1BCvAInYkD97ultS5Ur8JsVhFn-CA.js?scope=header&delta=0&language=nl&theme=corporate&include=eJx1keuSgyAMhV9I5ZGYFCKmomFCdNu332i7u8yO_QFCvlwOx8BSWEDRBV4Kr7hqHSAElki8duEKR4LM6ZqtsFMCtdp-5Bx50-u8woV3lGtYdYvP4w6CTQZmXE5OC6RLsFNEbsHWThgpK0qvnFJuy4t1M0W29_iwjBVyn2md63WOYDWhlfYPPWoQzvkDM4E3kGu4E35ZVPsJKU2tcVVlC7rZ5GFkNomdvcwHU2HP9oddxM7mUtE34ZmwCLvfk0-6-DBhmH-qt6q8uDCxNbEeNqf6m1A0axuukBKKec5nNIJChieKw_2w_AwWS2Bzjer5592_ezdCcLYGW-3Zl7wl-sMLyHyvPsS1O6yo7twHuMPjFfDH0U9kwuTp3t9v5pAV3wwww.eur.nl/sites/corporate/files/js... https://www.eur.nl/sites/corporate/files/js/js_MLNkSycuaM9Zkm1BCvAInYkD97ultS5Ur8JsVhFn-CA.js?scope=header&delta=0&language=nl&theme=corporate&include=eJx1keuSgyAMhV9I5ZGYFCKmomFCdNu332i7u8yO_QFCvlwOx8BSWEDRBV4Kr7hqHSAElki8duEKR4LM6ZqtsFMCtdp-5Bx50-u8woV3lGtYdYvP4w6CTQZmXE5OC6RLsFNEbsHWThgpK0qvnFJuy4t1M0W29_iwjBVyn2md63WOYDWhlfYPPWoQzvkDM4E3kGu4E35ZVPsJKU2tcVVlC7rZ5GFkNomdvcwHU2HP9oddxM7mUtE34ZmwCLvfk0-6-DBhmH-qt6q8uDCxNbEeNqf6m1A0axuukBKKec5nNIJChieKw_2w_AwWS2Bzjer5592_ezdCcLYGW-3Zl7wl-sMLyHyvPsS1O6yo7twHuMPjFfDH0U9kwuTp3t9v5pAV3w — 200 — 25.9 KiB — 157 ms — http/1.1https://www.eur.nl/modules/custom/eur_consent_studio/js/banner.js?tdx2s1www.eur.nl/modules/custom/eur_conse... https://www.eur.nl/modules/custom/eur_consent_studio/js/banner.js?tdx2s1 — 200 — 2.5 KiB — 155 ms — 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http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1439ms · 494KB · €16/mo
data.eur.nl
Other
Costly
Execution 360ms
Transfer 179 KB
Unused 32%
Monthly Cost €4/mo
Unattributable
Other
Costly
Execution 321ms
Transfer 0 KB
Monthly Cost €3/mo
data.eur.nl
Other
Costly
Execution 254ms
Transfer 197 KB
Unused 46%
Monthly Cost €3/mo
www.eur.nl
Other
Costly
Execution 252ms
Transfer 26 KB
Monthly Cost €3/mo
consent.studio
Other
Optional
Execution 106ms
Transfer 38 KB
Monthly Cost €1/mo
www.eur.nl
Other
Optional
Execution 78ms
Transfer 32 KB
Monthly Cost €1/mo
www.eur.nl
Other
Optional
Execution 68ms
Transfer 22 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • data.eur.nl adds 360ms and costs ~€4/month
  • Unattributable adds 321ms and costs ~€3/month
  • data.eur.nl adds 254ms and costs ~€3/month
  • www.eur.nl adds 252ms and costs ~€3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

data.eur.nl takes 360ms 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

Unattributable takes 321ms 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

data.eur.nl takes 254ms 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

www.eur.nl takes 252ms 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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