Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
456 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.22 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
29 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.014
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
640 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.
2.24 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 sDPage Weight BudgetAction2.2 MB transferred, 25 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
CImage OptimizationAction13 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CJS BundlesAction3 scripts, 225 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://autoriteitpersoonsgegevens.nl/uploads/js/js_A9wUU_c1xSsT2sYBODbrhTKqHzhD5sH5jFcfj130o9g.js?scope=footer&delta=1&language=nl&theme=frontend&include=eJx1jVEKwzAMxS6ULUcKTvLaBtzY2A7s-Ot-S_cpIVBFBKzgo-LoZRt8oWdaIcVXPUek-pzsmDDi1MSQuy0lfjdhJnWkzWQGZs87S72iG78OUE8OsnYU0lF-vyanMgL5j_8C7rVD_g | 298 KB | 181 KB (61%) | ✓ | 1st |
| https://autoriteitpersoonsgegevens.nl/core/assets/vendor/jquery/jquery.min.js?v=4.0.0-rc.1 | 78 KB | 44 KB (57%) | ✓ | 1st |
| https://autoriteitpersoonsgegevens.nl/uploads/js/js_GD1fuDXTGiL-3VQgeqim07wOqlT2F-evq56HE7Mw5qw.js?scope=header&delta=0&language=nl&theme=frontend&include=eJx1jVEKwzAMxS6ULUcKTvLaBtzY2A7s-Ot-S_cpIVBFBKzgo-LoZRt8oWdaIcVXPUek-pzsmDDi1MSQuy0lfjdhJnWkzWQGZs87S72iG78OUE8OsnYU0lF-vyanMgL5j_8C7rVD_g | 1 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
CPage Weight InventoryAction25 resources · 2.2 MB · 225 KB savings availableREVIEW
~224.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 25 resources | 2.2 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Third-Party ImpactNo third-party resourcesPASS
A+Text CompressionAll text resources are compressedPASS
A+JS Execution Cost330ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://autoriteitpersoonsgegevens.nl/uploads/js/js_A9wUU_c1xSsT2sYBODbrhTKqHzhD5sH5jFcfj130o9g.js?scope=footer&delta=1&language=nl&theme=frontend&include=eJx1jVEKwzAMxS6ULUcKTvLaBtzY2A7s-Ot-S_cpIVBFBKzgo-LoZRt8oWdaIcVXPUek-pzsmDDi1MSQuy0lfjdhJnWkzWQGZs87S72iG78OUE8OsnYU0lF-vyanMgL5j_8C7rVD_g | 134ms | 87ms | 43ms | 1st |
| https://autoriteitpersoonsgegevens.nl/ | 128ms | 6ms | 0ms | 1st |
| Unattributable | 69ms | 2ms | 0ms | 3rd |
A+Font Loading5 fonts (689 KB)PASS
Web fonts
5
689 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 ~546 KB and ~1092 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP Cachingmax-age=60 (1 minute)PASS
max-age=60, public
| Directive | Value | Meaning |
|---|---|---|
| max-age | 60 | Cache for 1 minute |
| public | — | Any cache may store this response |
Network Waterfall25 requests over 440msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 69ms | 0 KB | — | €1/mo | Optional |