https://www.bloemendaal.nl
Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
92
GRADE
A
FIX
0
REVIEW
6
PASS
14
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
97
96
100
92
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
420 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.22 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.
0.044
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
615 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.
1.22 s
Page Load Progression
Checks
2314 PASS 6 REVIEW
BPage Weight Budget1.0 MB transferred, 78 requestsREVIEW
Page Weight Budget
1.0 MB transferred, 78 requests
1.0 MB transferred, 78 requests
Info::
Page weighs 1.5 MB (1.0 MB transferred)
Info::
78 HTTP requests
Info::
Estimated 0.22 g CO2 per page load
1.0 MB transferred
78 requests
0.22 g CO2 per page load
Images 751.5 KiB 71%
Fonts 105.7 KiB 10%
CSS 85.9 KiB 8%
JavaScript 56.9 KiB 5%
HTML 29.6 KiB 3%
Other 29.2 KiB 3%
Other 3.1 KiB 0%
0 2.4 MB 4.9 MB
Under budget
CImage OptimizationAction6 images, 0 KB saveableREVIEW
Image Optimization
Action6 images, 0 KB saveable
6 images, 0 KB saveable
Warning::
https://www.bloemendaal.nl/fileadmin/Bloemendaal/A... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bloemendaal.nl/fileadmin/_processed_/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bloemendaal.nl/fileadmin/_processed_/0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bloemendaal.nl/fileadmin/_processed_/7... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
6 images 751 KB
0 oversized -0 KB
6 legacy format
4 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
HTTP/3 (QUIC)
HTTP/3 not advertised
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.
BDocument CompressionDocument response uses gzip; brotli would be ~20% smallerREVIEW
Document Compression
Document response uses gzip; brotli would be ~20% smaller
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.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
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.
BHTTP Cachingno-cacheREVIEW
HTTP Caching
no-cache
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
ETag present — enables conditional (304) responses
Cache-Control
no-cache
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
A+Third-Party Impact11% third-party, 0 ms blockingPASS
Third-Party Impact
11% third-party, 0 ms blocking
11% third-party, 0 ms blocking
Info::
Third-party code accounts for 11% of page weight (120.5 KiB of 1.0 MiB)
Info::
Third-party blocking time is low (0 ms)
89%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+JS Execution Cost296ms total JS executionPASS
JS Execution Cost
296ms total JS execution
296ms total JS execution
Info::
https://www.bloemendaal.nl/: 226ms CPU time
Info::
Unattributable: 70ms CPU time
Main Thread Breakdown
Style & Layout 42% Other 32% Rendering 11% Script Evaluation 8% Parse HTML & CSS 5%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.bloemendaal.nl/ | 226ms | 1ms | 0ms | 1st |
| Unattributable | 70ms | 2ms | 0ms | 1st |
A+Font Loading5 fonts (106 KB)PASS
Font Loading
5 fonts (106 KB)
5 fonts (106 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
106 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
fira-sans-v16-latin-reg... woff2 swap
Size 22 KB
Load time 30 ms
Start 417 ms
Risk FOUT — text flashes from fallback to web font
fira-sans-v16-latin-500... woff2 swap
Size 22 KB
Load time 36 ms
Start 417 ms
Risk FOUT — text flashes from fallback to web font
fira-sans-v16-latin-700... woff2 swap
Size 23 KB
Load time 39 ms
Start 418 ms
Risk FOUT — text flashes from fallback to web font
x-font-ttf;charset=utf-... unknown swap
Size 13 KB
Load time 33 ms
Start 510 ms
Risk FOUT — text flashes from fallback to web font
font-woff;charset=utf-8... woff swap
Size 25 KB
Load time 33 ms
Start 510 ms
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
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 ~11 KB and ~22 ms
A+JS Bundles16 scripts, 0 KB unusedPASS
JS Bundles
16 scripts, 0 KB unused
16 scripts, 0 KB unused
0 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.bloemendaal.nl/typo3temp/assets/js/856c21b0ff0e696ddc4682e1b0c79e19.js?1794363296 | 1 KB | — | ✓ | 1st |
| https://cdn-eu.readspeaker.com/script/6705/webReader/webReader.js?pids=wr | 29 KB | — | ✓ | 3rd |
| https://www.bloemendaal.nl/typo3temp/assets/js/0f851906d0fb8bbe408c0ec9ef59dfcc.js?1794363294 | 1 KB | — | ✓ | 1st |
| https://www.bloemendaal.nl/typo3temp/assets/js/c61cf696477a039a40af6adc6921939d.js?1794363294 | 0 KB | — | ✓ | 1st |
| https://www.bloemendaal.nl/_assets/6c3bf359f8df9d9222347f37e2814501/JavaScript/OpenGemeentenSiteSearch-PageHeader-Search.min.js?1794359036 | 1 KB | — | ✓ | 1st |
| https://www.bloemendaal.nl/_assets/6c3bf359f8df9d9222347f37e2814501/JavaScript/OpenGemeentenSiteSearch-Suggest.min.js?1794359036 | 2 KB | — | ✓ | 1st |
| https://www.bloemendaal.nl/_assets/f52859db1e4f013bae2a279b52772e55/Js/OpenGemeentenCeFeatureCollapsible.min.js?1794359035 | 2 KB | — | ✓ | 1st |
| https://www.bloemendaal.nl/_assets/317130fbcbb12622b6e28e3bfff3cb16/Js/OpenGemeentenSite-Focusable.min.js?1794359036 | 0 KB | — | ✓ | 1st |
| https://www.bloemendaal.nl/_assets/317130fbcbb12622b6e28e3bfff3cb16/Js/OpenGemeentenSite-FragmentScroll.min.js?1794359036 | 1 KB | — | ✓ | 1st |
| https://www.bloemendaal.nl/_assets/317130fbcbb12622b6e28e3bfff3cb16/Js/OpenGemeentenSite-Media.min.js?1794359036 | 2 KB | — | ✓ | 1st |
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
AAsset Compression1 of 1 asset host still on gzipPASS
Asset Compression
1 of 1 asset host still on gzip
1 of 1 asset host still on gzip
Info::
cdn-eu.readspeaker.com serves assets with gzip; brotli would be ~20% smaller (assets: 3)
Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.
Got: cdn-eu.readspeaker.com (text/css)
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Main HTML Cache-ControlMain HTML uses no-cache -- safe revalidate-on-request policyPASS
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
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::
`ETag` present -- conditional GET supported
A+Page Weight Inventory78 resources · 1.0 MB · 0 KB savings availablePASS
Page Weight Inventory
78 resources · 1.0 MB · 0 KB savings available
78 resources · 1.0 MB · 0 KB savings available
Warning::
Page weight 1.0 MB exceeds 1 MB target by 38 KB
Got: 1.0 MB Expected: ≤ 1 MB
Info::
6 third-party resources (11% of weight)
Info::
1 resources over 200KB
78 resources · 1.0 MiB · 6 third-party 37.9 KiB over 1MB target
Image 74% · 780.7 KiB
Font 10% · 105.7 KiB
CSS 8% · 85.9 KiB
JavaScript 5% · 56.9 KiB
Document 3% · 32.7 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 78 resources | 1.0 MiB | ||||||
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Leaseweb Global BV
Network Waterfall78 requests over 691msINFO
Network Waterfall
78 requests over 691ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-10-14 — 2026-11-10)
LCP (p75)
789 ms
97% good
INP (p75)
69 ms
98% good
CLS (p75)
0.000
96% good
FCP (p75)
702 ms
TTFB (p75)
383 ms
This origin passes Core Web Vitals assessment
Image Optimization5 images, 364 KB total, 0 KB wastedINFO
Image Optimization
5 images, 364 KB total, 0 KB wasted
Image Optimization Audit
Total Images
5
Total Size
364 KB
5 missing dimensions 3 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.