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.
11.58 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
17.34 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.04 s
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.
11.58 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.
24.72 s
Page Load Progression
FPage Weight BudgetAction2.8 MB transferred, 137 requestsFIX
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
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
FJS Execution CostAction9520ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 1672ms | 1500ms | 111ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N4SNZN | 1237ms | 1009ms | 107ms | 3rd |
| Unattributable | 1155ms | 363ms | 0ms | 3rd |
| https://viadeo.journaldunet.com/ | 1086ms | 86ms | 6ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W4LL24P | 626ms | 483ms | 73ms | 3rd |
| https://utiq.journaldunet.com/utiqLoader.js | 541ms | 479ms | 16ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 414ms | 314ms | 72ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-QFJ0YBKH33&cx=c>m=4e64k1 | 394ms | 280ms | 61ms | 3rd |
| https://astatic.ccmbg.com/copainsdavant.linternaute.com/dist/app/js/app.37cd070f50d0f25d54a6.js | 353ms | 236ms | 93ms | 3rd |
| https://astatic.ccmbg.com/asl3/dist/asl.viadeo.57ba0cc09ebcef5f3238.js | 243ms | 210ms | 17ms | 3rd |
Showing top 10 of 27 scripts
FJS BundlesAction50 scripts, 1.4 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://astatic.ccmbg.com/copainsdavant.linternaute.com/dist/app/js/app.37cd070f50d0f25d54a6.js | 215 KB | 170 KB (79%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 162 KB (45%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 162 KB (45%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 162 KB (45%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 162 KB (45%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 188 KB | 103 KB (55%) | ✓ | 3rd |
| https://widgets.outbrain.com/outbrain.js | 110 KB | 87 KB (80%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-QFJ0YBKH33&cx=c>m=4e64k1 | 153 KB | 62 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W4LL24P | 127 KB | 60 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N4SNZN | 185 KB | 56 KB (30%) | ✓ | 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 InventoryAction137 resources · 2.8 MB · 1.4 MB savings availableFIX
~1.4 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 137 resources | 2.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization13 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (82 KB)PASS
Web fonts
5
82 KB total
Render-blocking
0
of 5
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
Network Waterfall137 requests over 4028msINFO
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 | 1672ms | 0 KB | 45% | €18/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 1237ms | 185 KB | 30% | €13/mo | Costly |
Unattributable Unattributable | Other | 1155ms | 0 KB | — | €13/mo | Costly |
viadeo.journaldunet.com viadeo.journaldunet.com | Other | 1086ms | 31 KB | — | €12/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 626ms | 127 KB | 47% | €7/mo | Costly |
utiq.journaldunet.com utiq.journaldunet.com | Other | 541ms | 41 KB | 50% | €6/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 414ms | 188 KB | 55% | €4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 394ms | 153 KB | 41% | €4/mo | Costly |
astatic.ccmbg.com astatic.ccmbg.com | Other | 353ms | 215 KB | 79% | €4/mo | Costly |
astatic.ccmbg.com astatic.ccmbg.com | Other | 243ms | 41 KB | — | €3/mo | Costly |
widgets.outbrain.com widgets.outbrain.com | Other | 207ms | 110 KB | 80% | €2/mo | Costly |
ajax.googleapis.com ajax.googleapis.com | Other | 160ms | 33 KB | — | €2/mo | Optional |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 159ms | 91 KB | 56% | €2/mo | Optional |
astatic.ccmbg.com astatic.ccmbg.com | Other | 147ms | 2 KB | — | €2/mo | Optional |
config.aps.amazon-adsystem.com config.aps.amazon-adsystem.com | Other | 121ms | 1 KB | — | €1/mo | Optional |
cdn.appconsent.io cdn.appconsent.io | Other | 106ms | 56 KB | 64% | €1/mo | Optional |
ep2.adtrafficquality.google ep2.adtrafficquality.google | Other | 106ms | 8 KB | — | €1/mo | Optional |
cdn.opecloud.com cdn.opecloud.com | Other | 101ms | 18 KB | — | €1/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 98ms | 34 KB | — | €1/mo | Optional |
secure.cdn.fastclick.net secure.cdn.fastclick.net | Other | 96ms | 22 KB | — | €1/mo | Optional |
cdn.binsiad.com cdn.binsiad.com | Other | 91ms | 25 KB | — | €1/mo | Optional |
cdn.id5-sync.com cdn.id5-sync.com | Other | 88ms | 34 KB | — | €1/mo | Optional |
static-lists.linternaute.com static-lists.linternaute.com | Other | 81ms | 7 KB | — | €1/mo | Optional |
ats-wrapper.privacymanager.io ats-wrapper.privacymanager.io | Other | 72ms | 39 KB | 58% | €1/mo | Optional |
tags.crwdcntrl.net tags.crwdcntrl.net | Other | 59ms | 14 KB | — | €1/mo | Optional |
oa.openxcdn.net oa.openxcdn.net | Other | 58ms | 8 KB | — | €1/mo | Optional |
cdn.id5-sync.com cdn.id5-sync.com | Other | 50ms | 35 KB | 89% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.gstatic.com adds 1672ms and costs ~€18/month
- Google Tag Manager adds 1237ms and costs ~€13/month
- Unattributable adds 1155ms and costs ~€13/month
- viadeo.journaldunet.com adds 1086ms and costs ~€12/month
- Google Tag Manager adds 626ms and costs ~€7/month
- utiq.journaldunet.com adds 541ms and costs ~€6/month
- securepubads.g.doubleclick.net adds 414ms and costs ~€4/month
- Google Tag Manager adds 394ms and costs ~€4/month
- astatic.ccmbg.com adds 353ms and costs ~€4/month
- astatic.ccmbg.com adds 243ms and costs ~€3/month
- widgets.outbrain.com adds 207ms and costs ~€2/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 1672ms 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 1237ms 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 1155ms 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
viadeo.journaldunet.com takes 1086ms 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 626ms 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
utiq.journaldunet.com takes 541ms 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 414ms 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
55% 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
Google Tag Manager takes 394ms 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
astatic.ccmbg.com takes 353ms 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
79% of astatic.ccmbg.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
astatic.ccmbg.com takes 243ms 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
widgets.outbrain.com takes 207ms 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
80% of widgets.outbrain.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
56% of c.amazon-adsystem.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
64% of cdn.appconsent.io'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
58% of ats-wrapper.privacymanager.io'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
89% of cdn.id5-sync.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