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https://www.zaanstad.nl

Performance

· 24 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
4
REVIEW
7
PASS
9
INFO
4

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

Mobile Desktop
87
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
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.

865 ms

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

2.24 s

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.

0.001

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

1.23 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.

2.27 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
24
9 PASS 7 REVIEW 4 FIX
F
Page Weight Budget
Action
3.2 MB transferred, 53 requests
FIX
3.2 MB transferred, 53 requests
Warning::
Page weighs 4.1 MB (3.2 MB transferred)
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
CSS is 473 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 473 KB
Info::
Fonts are 265 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 265 KB
Info::
53 HTTP requests
Info::
Estimated 0.67 g CO2 per page load
3.2 MB / 2.4 MB budget
3.2 MB transferred
53 requests
0.67 g CO2 per page load
JavaScript 1.1 MiB 36%
Images 810.4 KiB 25%
CSS 472.9 KiB 15%
Other 408.5 KiB 13%
Fonts 265.1 KiB 8%
Other 95.3 KiB 3%
HTML 25.5 KiB 1%
Other 2.5 KiB 0%
0 2.4 MB 4.9 MB
Over budget

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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

F
JS Bundles
Action
15 scripts, 624 KB unused
FIX
15 scripts, 624 KB unused
Warning::
https://www.zaanstad.nl/wp-content/themes/theme-fu...: 442 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://translate.googleapis.com/_/translate_http/...: 70 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.zaanstad.nl/wp-includes/js/jquery/jque...: 63 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.zaanstad.nl/wp-includes/js/dist/vendor...: 49 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 624 KB
624 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build/vendor.js?ver=8b29be170135a2c12aad729 KB442 KB (61%)✓1st
https://translate.googleapis.com/_/translate_http/_/js/k=translate_http.tr.fa.sk_r62Ce3Yo.O/am=AAAAGA/d=1/ed=1/rs=AN8SPfpKvAzE4-YvfqsXBk3Dm3DevXA-zg/m=el_main111 KB70 KB (63%)✓3rd
https://www.zaanstad.nl/wp-includes/js/jquery/jquery.min.js86 KB63 KB (74%)✓1st
https://www.zaanstad.nl/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1129 KB49 KB (38%)✓1st
https://www.zaanstad.nl/wp-includes/js/dist/escape-html.min.js?ver=87ebe53e97bba59805a52 KB—✓1st
https://www.zaanstad.nl/wp-includes/js/dist/vendor/react-jsx-runtime.min.js?ver=18.3.12 KB—✓1st
https://www.zaanstad.nl/wp-content/plugins/cookie-law-info/lite/frontend/js/script.min.js?ver=3.5.826 KB—✓1st
https://www.zaanstad.nl/wp-includes/js/dist/element.min.js?ver=4a4370b2b349066fd44013 KB—✓1st
https://www.zaanstad.nl/wp-includes/js/dist/vendor/react.min.js?ver=18.3.1.111 KB—✓1st
https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build/frontend.js?ver=8b29be170135a2c12aad18 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

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

D
Page Weight Inventory
Action
53 resources · 3.2 MB · 624 KB savings available
FIX
53 resources · 3.2 MB · 624 KB savings available
Warning::
Page weight 3.2 MB exceeds 1 MB target by 2.2 MB
Got: 3.2 MB Expected: ≤ 1 MB
Info::
~624 KB of savings available
Info::
29 third-party resources (28% of weight)
Info::
5 resources over 200KB
53 resources · 3.2 MiB · 29 third-party 2.2 MiB over 1MB target
Image 37% · 1.2 MiB
JavaScript 36% · 1.1 MiB
CSS 17% · 568.2 KiB
Font 8% · 265.1 KiB
Document 1% · 26.5 KiB
Other 0% · 2.5 KiB

~624.0 KiB of savings available

Remove unused JavaScript: 624.0 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.

B
Image Optimization
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Warning::
https://www.zaanstad.nl/wp-content/uploads/2025/02... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11 images 810 KB
0 oversized -0 KB
11 legacy format
1 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

B
JS Execution Cost
572ms total JS execution
REVIEW
572ms total JS execution
Warning::
https://www.zaanstad.nl/: 432ms CPU time
Info::
Unattributable: 89ms CPU time
Info::
https://translate.googleapis.com/_/translate_http/...: 52ms CPU time
Info::
Third-party scripts: 52ms (9% of total)

Main Thread Breakdown

Other 32% Style & Layout 27% Script Evaluation 25% Rendering 7% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.zaanstad.nl/432ms3ms2ms1st
Unattributable89ms5ms0ms1st
https://translate.googleapis.com/_/translate_http/_/js/k=translate_http.tr.fa.sk_r62Ce3Yo.O/am=AAAAGA/d=1/ed=1/rs=AN8SPfpKvAzE4-YvfqsXBk3Dm3DevXA-zg/m=el_main52ms35ms8ms3rd
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
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
Asset Compression
1 of 1 asset host serve text uncompressed
REVIEW
1 of 1 asset host serve text uncompressed
Warning::
www.gstatic.com serves text assets uncompressed (assets: 3)
The sampled response carries a text content type but no Content-Encoding, so the bytes go over the wire raw. Text compression typically removes 70-80% of a JS or CSS payload -- this is the single cheapest transfer win available on this host.
Got: www.gstatic.com (text/css)
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
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.
A
Third-Party Impact
28% third-party, 0 ms blocking
PASS
28% third-party, 0 ms blocking
Info::
Third-party code accounts for 28% of page weight (904.9 KiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
72%
28%
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
14 fonts (265 KB)
PASS
14 fonts (265 KB)
Info::
14 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

14

265 KB total

Render-blocking

0

of 14

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 865 ms LCP 2.2 shttps://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build//fonts/lato-v25-latin-700.8f28e0e1.woff2lato-v25-latin-700.8f28... https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build//fonts/lato-v25-latin-700.8f28e0e1.woff2 — 23.0 KiB — 31 ms — font-display: swaphttps://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build//fonts/lato-v25-latin-regular.be36596d.woff2lato-v25-latin-regular.... https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build//fonts/lato-v25-latin-regular.be36596d.woff2 — 23.5 KiB — 31 ms — font-display: swaphttps://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build//fonts/lato-v25-latin-italic.516d382b.woff2lato-v25-latin-italic.5... https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build//fonts/lato-v25-latin-italic.516d382b.woff2 — 24.3 KiB — 30 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-13.woff2pro-fa-light-300-13.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-13.woff2 — 16.6 KiB — 35 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-0.woff2pro-fa-solid-900-0.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-0.woff2 — 11.8 KiB — 32 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-12.woff2pro-fa-regular-400-12.w... https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-12.woff2 — 18.8 KiB — 33 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-12.woff2pro-fa-light-300-12.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-12.woff2 — 20.2 KiB — 36 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-0.woff2pro-fa-regular-400-0.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-0.woff2 — 14.3 KiB — 34 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-1.woff2pro-fa-light-300-1.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-1.woff2 — 17.8 KiB — 36 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-14.woff2pro-fa-light-300-14.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-14.woff2 — 17.3 KiB — 45 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-16.woff2pro-fa-light-300-16.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-16.woff2 — 22.8 KiB — 47 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-18.woff2pro-fa-light-300-18.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-light-300-18.woff2 — 24.1 KiB — 37 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-22.woff2pro-fa-solid-900-22.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-22.woff2 — 16.6 KiB — 38 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-1.woff2pro-fa-solid-900-1.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-1.woff2 — 13.8 KiB — 39 ms — font-display: swap
lato-v25-latin-700.8f28... woff2 swap
Size 23 KB
Load time 31 ms
Start 959 ms
Risk FOUT — text flashes from fallback to web font
lato-v25-latin-regular.... woff2 swap
Size 24 KB
Load time 31 ms
Start 959 ms
Risk FOUT — text flashes from fallback to web font
lato-v25-latin-italic.5... woff2 swap
Size 24 KB
Load time 30 ms
Start 960 ms
Risk FOUT — text flashes from fallback to web font
pro-fa-light-300-13.woff2 woff2 swap
Size 17 KB
Load time 35 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-0.woff2 woff2 swap
Size 12 KB
Load time 32 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-regular-400-12.w... woff2 swap
Size 19 KB
Load time 33 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-light-300-12.woff2 woff2 swap
Size 20 KB
Load time 36 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-regular-400-0.woff2 woff2 swap
Size 14 KB
Load time 34 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-light-300-1.woff2 woff2 swap
Size 18 KB
Load time 36 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-light-300-14.woff2 woff2 swap
Size 17 KB
Load time 45 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-light-300-16.woff2 woff2 swap
Size 23 KB
Load time 47 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-light-300-18.woff2 woff2 swap
Size 24 KB
Load time 37 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-22.woff2 woff2 swap
Size 17 KB
Load time 38 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-1.woff2 woff2 swap
Size 14 KB
Load time 39 ms
Start 1.3 s
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: gzip` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Previder BV

Network Waterfall
53 requests over 1852ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 865 ms LCP 2.2 shttps://www.zaanstad.nl// https://www.zaanstad.nl/ — 200 — 25.5 KiB — 776 ms — h2https://www.zaanstad.nl/wp-includes/css/dist/block-library/style.min.css/wp-includes/css/dist/block-library... https://www.zaanstad.nl/wp-includes/css/dist/block-library/style.min.css — 200 — 138.2 KiB — 95 ms — h2https://www.zaanstad.nl/wp-content/plugins/cookie-law-info/lite/frontend/js/script.min.js?ver=3.5.8/wp-content/plugins/cookie-law-info... https://www.zaanstad.nl/wp-content/plugins/cookie-law-info/lite/frontend/js/script.min.js?ver=3.5.8 — 200 — 25.6 KiB — 86 ms — h2https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build//frontend.css?ver=8b29be170135a2c12aad/wp-content/themes/theme-fusion/ass... https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build//frontend.css?ver=8b29be170135a2c12aad — 200 — 330.1 KiB — 121 ms — h2https://www.zaanstad.nl/manifest.webmanifest/manifest.webmanifest https://www.zaanstad.nl/manifest.webmanifest — 301 — 1016 B — 346 ms — h2https://www.zaanstad.nl/wp-content/uploads/2023/11/Stadhuis-by-night.jpg/wp-content/uploads/2023/11/Stadhui... https://www.zaanstad.nl/wp-content/uploads/2023/11/Stadhuis-by-night.jpg — 200 — 335.3 KiB — 131 ms — h2https://www.zaanstad.nl/wp-content/uploads/2025/02/logo_Gemeente_Zaanstad_RGB.png/wp-content/uploads/2025/02/logo_Ge... https://www.zaanstad.nl/wp-content/uploads/2025/02/logo_Gemeente_Zaanstad_RGB.png — 200 — 19.0 KiB — 45 ms — h2https://www.zaanstad.nl/wp-content/plugins/the-events-calendar/common/build/js/user-agent.js?ver=da75d0bdea6dde3898df/wp-content/plugins/the-events-cale... https://www.zaanstad.nl/wp-content/plugins/the-events-calendar/common/build/js/user-agent.js?ver=da75d0bdea6dde3898df — 200 — 831 B — 47 ms — h2https://www.zaanstad.nl/wp-includes/js/jquery/jquery.min.js/wp-includes/js/jquery/jquery.min.j... https://www.zaanstad.nl/wp-includes/js/jquery/jquery.min.js — 200 — 86.1 KiB — 47 ms — h2https://www.zaanstad.nl/wp-includes/js/dist/vendor/react.min.js?ver=18.3.1.1/wp-includes/js/dist/vendor/react.m... https://www.zaanstad.nl/wp-includes/js/dist/vendor/react.min.js?ver=18.3.1.1 — 200 — 11.0 KiB — 46 ms — h2https://www.zaanstad.nl/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1/wp-includes/js/dist/vendor/react-d... https://www.zaanstad.nl/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.3.1.1 — 200 — 129.4 KiB — 54 ms — h2https://www.zaanstad.nl/wp-includes/js/dist/vendor/react-jsx-runtime.min.js?ver=18.3.1/wp-includes/js/dist/vendor/react-j... https://www.zaanstad.nl/wp-includes/js/dist/vendor/react-jsx-runtime.min.js?ver=18.3.1 — 200 — 1.6 KiB — 47 ms — h2https://www.zaanstad.nl/wp-includes/js/dist/escape-html.min.js?ver=87ebe53e97bba59805a5/wp-includes/js/dist/escape-html.mi... https://www.zaanstad.nl/wp-includes/js/dist/escape-html.min.js?ver=87ebe53e97bba59805a5 — 200 — 1.7 KiB — 49 ms — h2https://www.zaanstad.nl/wp-includes/js/dist/element.min.js?ver=4a4370b2b349066fd440/wp-includes/js/dist/element.min.js... https://www.zaanstad.nl/wp-includes/js/dist/element.min.js?ver=4a4370b2b349066fd440 — 200 — 12.7 KiB — 50 ms — h2https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build/vendor.js?ver=8b29be170135a2c12aad/wp-content/themes/theme-fusion/ass... https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build/vendor.js?ver=8b29be170135a2c12aad — 200 — 729.1 KiB — 74 ms — h2https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build/frontend.js?ver=8b29be170135a2c12aad/wp-content/themes/theme-fusion/ass... https://www.zaanstad.nl/wp-content/themes/theme-fusion/assets/dist/build/frontend.js?ver=8b29be170135a2c12aad — 200 — 18.5 KiB — 52 ms — h2https://kit.fontawesome.com/8442ade4bd.jskit.fontawesome.com/8442ade4bd.js https://kit.fontawesome.com/8442ade4bd.js — 200 — 6.1 KiB — 30 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
9% of JavaScript execution is third-party
First-party Third-party 52ms · 111KB · €1/mo
translate.googleapis.com
Other
Optional
Execution 52ms
Transfer 111 KB
Unused 63%
Monthly Cost €1/mo

63% of translate.googleapis.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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-10-14 — 2026-11-10)

LCP (p75)

1546 ms

94% good

INP (p75)

81 ms

97% good

CLS (p75)

0.000

99% good

FCP (p75)

1500 ms

TTFB (p75)

1148 ms

This origin passes Core Web Vitals assessment
Image Optimization
9 images, 356 KB total, 293 KB wasted
INFO

Image Optimization Audit

Total Images

9

Total Size

356 KB

Oversized

2

Wasted

293 KB

7 missing dimensions 5 missing lazy loading
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