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.
1.34 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.09 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
124 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.006
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.17 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.
6.42 s
Page Load Progression
FPage Weight BudgetAction6.7 MB transferred, 102 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
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2173ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 622ms | 466ms | 28ms | 3rd |
| https://www.euractiv.com/ | 605ms | 32ms | 4ms | 3rd |
| Unattributable | 272ms | 54ms | 0ms | 3rd |
| https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js | 134ms | 71ms | 7ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 122ms | 93ms | 18ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 112ms | 92ms | 16ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TJZTZQGM>m_auth=jDsVRFmWvcG2v1NWyBeD1Q>m_preview=env-1>m_cookies_win=x | 101ms | 85ms | 15ms | 3rd |
| https://prod-eura.mhtr.be/public/tr/tracker.min.js | 80ms | 35ms | 22ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-en-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 68ms | 29ms | 7ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HXBKFC7W3W&cx=c>m=4e64h1 | 58ms | 43ms | 15ms | 3rd |
FJS BundlesAction41 scripts, 1.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 156 KB (43%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 156 KB (43%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 156 KB (43%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 188 KB | 132 KB (70%) | ✓ | 3rd |
| https://prod-eura.mhtr.be/public/tr/tracker.min.js | 158 KB | 113 KB (72%) | ✓ | 3rd |
| https://cdn.flip-pay.com/flip-pay.js | 111 KB | 85 KB (77%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TJZTZQGM>m_auth=jDsVRFmWvcG2v1NWyBeD1Q>m_preview=env-1>m_cookies_win=x | 149 KB | 78 KB (52%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HXBKFC7W3W&cx=c>m=4e64h1 | 145 KB | 61 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PPG273DZ>m_auth=ucfeoZBjIpd9Z7CuXXoGGw>m_preview=env-1>m_cookies_win=x | 136 KB | 58 KB (42%) | ✓ | 3rd |
| https://www.euractiv.com/content/themes/io/build/main-CCmPAfrn.js | 62 KB | 48 KB (79%) | ✓ | 3rd |
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
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
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
FPage Weight InventoryAction102 resources · 6.7 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 102 resources | 6.7 MiB | ||||||
BImage Optimization30 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (206 KB)PASS
Web fonts
7
206 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
AHTTP Cachingmax-age=3600 (1 hour)PASS
max-age=3600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 3600 | Cache for 1 hour |
Network Waterfall102 requests over 3510msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gstatic.com www.gstatic.com | Other | 622ms | 0 KB | 43% | $8/mo | Costly |
www.euractiv.com www.euractiv.com | Other | 605ms | 58 KB | — | $8/mo | Costly |
Unattributable Unattributable | Other | 272ms | 0 KB | — | $4/mo | Costly |
Hotjar script.hotjar.com | Session Replay | 134ms | 57 KB | 62% | $2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 122ms | 188 KB | 70% | $2/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 112ms | 103 KB | 43% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 101ms | 149 KB | 52% | $1/mo | Optional |
prod-eura.mhtr.be prod-eura.mhtr.be | Other | 80ms | 158 KB | 72% | $1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 68ms | 54 KB | — | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 58ms | 145 KB | 42% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.gstatic.com adds 622ms and costs ~$8/month
- www.euractiv.com adds 605ms and costs ~$8/month
- Unattributable adds 272ms and costs ~$4/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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
www.gstatic.com takes 622ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.euractiv.com takes 605ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 272ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
62% of Hotjar's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
70% of securepubads.g.doubleclick.net's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
52% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
72% of prod-eura.mhtr.be's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev