Performance
· 17 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.
4.95 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
23.33 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.62 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.018
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.69 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.
28.23 s
Page Load Progression
FPage Weight BudgetAction5.4 MB transferred, 95 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction7952ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/zFuF-tbndD6YrdyXHX3EVT0n/recaptcha__en.js | 2115ms | 1888ms | 109ms | 3rd |
| https://www.euractiv.com/ | 1449ms | 110ms | 9ms | 3rd |
| Unattributable | 1097ms | 271ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PPG273DZ>m_auth=ucfeoZBjIpd9Z7CuXXoGGw>m_preview=env-1>m_cookies_win=x | 510ms | 436ms | 62ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 428ms | 289ms | 54ms | 3rd |
| https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js | 420ms | 273ms | 33ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HXBKFC7W3W&cx=c>m=4e64h1 | 306ms | 244ms | 61ms | 3rd |
| https://prod-eura.mhtr.be/public/tr/tracker.min.js | 257ms | 148ms | 87ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-en-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 248ms | 123ms | 32ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31097964 | 232ms | 153ms | 74ms | 3rd |
Showing top 10 of 17 scripts
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/zFuF-tbndD6YrdyXHX3EVT0n/recaptcha__en.js | 362 KB | 156 KB (43%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/zFuF-tbndD6YrdyXHX3EVT0n/recaptcha__en.js | 0 KB | 156 KB (43%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/zFuF-tbndD6YrdyXHX3EVT0n/recaptcha__en.js | 362 KB | 156 KB (43%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31097964 | 188 KB | 133 KB (71%) | ✓ | 3rd |
| https://prod-eura.mhtr.be/public/tr/tracker.min.js | 160 KB | 115 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 | 80 KB (54%) | ✓ | 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 | 137 KB | 56 KB (41%) | ✓ | 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 InventoryAction95 resources · 5.4 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 95 resources | 5.4 MiB | ||||||
BImage Optimization21 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+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
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 Waterfall95 requests over 3650msINFO
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 | 2115ms | 0 KB | 43% | $28/mo | Costly |
www.euractiv.com www.euractiv.com | Other | 1449ms | 58 KB | — | $19/mo | Costly |
Unattributable Unattributable | Other | 1097ms | 0 KB | — | $15/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 510ms | 137 KB | 41% | $7/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 428ms | 103 KB | 42% | $6/mo | Costly |
Hotjar script.hotjar.com | Session Replay | 420ms | 57 KB | 62% | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 306ms | 145 KB | 42% | $4/mo | Costly |
prod-eura.mhtr.be prod-eura.mhtr.be | Other | 257ms | 160 KB | 72% | $3/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 248ms | 54 KB | — | $3/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 232ms | 188 KB | 71% | $3/mo | Costly |
Hotjar script.hotjar.com | Session Replay | 178ms | 63 KB | 36% | $2/mo | Optional |
cdn.onesignal.com cdn.onesignal.com | Other | 166ms | 42 KB | 61% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 149ms | 149 KB | 54% | $2/mo | Optional |
www.euractiv.com www.euractiv.com | Other | 136ms | 31 KB | 71% | $2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 130ms | 34 KB | — | $2/mo | Optional |
cdn.flip-pay.com cdn.flip-pay.com | Other | 68ms | 111 KB | 77% | $1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 64ms | 1 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.gstatic.com adds 2115ms and costs ~$28/month
- www.euractiv.com adds 1449ms and costs ~$19/month
- Unattributable adds 1097ms and costs ~$15/month
- Google Tag Manager adds 510ms and costs ~$7/month
- sdk.privacy-center.org adds 428ms and costs ~$6/month
- Hotjar adds 420ms and costs ~$6/month
- Google Tag Manager adds 306ms and costs ~$4/month
- prod-eura.mhtr.be adds 257ms and costs ~$3/month
- sdk.privacy-center.org adds 248ms and costs ~$3/month
- securepubads.g.doubleclick.net adds 232ms and costs ~$3/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 2115ms 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 1449ms 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 1097ms 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
Google Tag Manager takes 510ms 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
sdk.privacy-center.org takes 428ms 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
Hotjar takes 420ms 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
Google Tag Manager takes 306ms 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
prod-eura.mhtr.be takes 257ms 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
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
sdk.privacy-center.org takes 248ms 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
securepubads.g.doubleclick.net takes 232ms 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
71% 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
61% of cdn.onesignal.com'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
54% 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
71% of www.euractiv.com'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
77% of cdn.flip-pay.com'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