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.
1.05 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.40 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
11 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.551
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.16 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.
2.20 s
Page Load Progression
FPage Weight BudgetAction3.0 MB transferred, 60 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS BundlesAction19 scripts, 505 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.sante.fr/modules/custom/sante_vuejs/vue-core/dist/js/chunk-vendors.js?tdl98j | 333 KB | 218 KB (66%) | ✓ | 3rd |
| https://www.sante.fr/modules/custom/sante_vuejs/vue-core/dist/js/chunk-common.js?tdl98j | 109 KB | 92 KB (85%) | ✓ | 3rd |
| https://www.sante.fr/sites/default/files/js/js_jN6NZEhOx-smM9I_EGQGe2NutS28nW4VajXThOkvWqI.js?scope=footer&delta=4&language=fr&theme=santefr&include=eJyFU1GWgyAMvFAth9ivPQUvQrRsA_EFsOvtFytYt923_ZHMZIgmE80VrUssGoxhsY6D2qPzIBwSBnuKUE4NhJKiOoLzdlRBuYfqEVZ2RCY2kNbah7hliWMEWVQLKn9hjxOMqFpQeTcI-LX-7KwihIEw1RSj79HqBEZZyROQtuBo8Xx43asmcg7WEOfWpnAuzyRgri6M6i_yfIcN1XsJZJ1L1salMjjVWKPBDiz-rQxzGaaD8FYoI8BbUQwwTe4b6T_l3b7Z4Q1b93vfY4LW2ZzxK-5GdBFBzKXri5PXX4rNm-5OdQfPtuwkOGNYvWgVXiSVvyBYlK4H2bKDKMNEMEXcibIuPVAX00K7BYXerj4g-_a9O-fZAn2GgePHukQ7n6CPD-DC0kVyx2I5FvA8xif8nNe-_F-gBcsWli5LPW6Lt5Qdyj2ebtiv66HqeS564vEHrN1s3g | 74 KB | 62 KB (84%) | ✓ | 3rd |
| https://www.sante.fr/sites/default/files/js/js_cOwkVzl4kgYe2lvC_YlRTxC6kkVmaLHDfciAKw9aHtA.js?scope=footer&delta=11&language=fr&theme=santefr&include=eJyFU1GWgyAMvFAth9ivPQUvQrRsA_EFsOvtFytYt923_ZHMZIgmE80VrUssGoxhsY6D2qPzIBwSBnuKUE4NhJKiOoLzdlRBuYfqEVZ2RCY2kNbah7hliWMEWVQLKn9hjxOMqFpQeTcI-LX-7KwihIEw1RSj79HqBEZZyROQtuBo8Xx43asmcg7WEOfWpnAuzyRgri6M6i_yfIcN1XsJZJ1L1salMjjVWKPBDiz-rQxzGaaD8FYoI8BbUQwwTe4b6T_l3b7Z4Q1b93vfY4LW2ZzxK-5GdBFBzKXri5PXX4rNm-5OdQfPtuwkOGNYvWgVXiSVvyBYlK4H2bKDKMNEMEXcibIuPVAX00K7BYXerj4g-_a9O-fZAn2GgePHukQ7n6CPD-DC0kVyx2I5FvA8xif8nNe-_F-gBcsWli5LPW6Lt5Qdyj2ebtiv66HqeS564vEHrN1s3g | 46 KB | 41 KB (89%) | ✓ | 3rd |
| https://www.sante.fr/sites/default/files/js/js_Fhh6K9ZEYaH8s4VRKSvcyH6vjAd0UpmWAQpwvAbS47k.js?scope=footer&delta=2&language=fr&theme=santefr&include=eJyFU1GWgyAMvFAth9ivPQUvQrRsA_EFsOvtFytYt923_ZHMZIgmE80VrUssGoxhsY6D2qPzIBwSBnuKUE4NhJKiOoLzdlRBuYfqEVZ2RCY2kNbah7hliWMEWVQLKn9hjxOMqFpQeTcI-LX-7KwihIEw1RSj79HqBEZZyROQtuBo8Xx43asmcg7WEOfWpnAuzyRgri6M6i_yfIcN1XsJZJ1L1salMjjVWKPBDiz-rQxzGaaD8FYoI8BbUQwwTe4b6T_l3b7Z4Q1b93vfY4LW2ZzxK-5GdBFBzKXri5PXX4rNm-5OdQfPtuwkOGNYvWgVXiSVvyBYlK4H2bKDKMNEMEXcibIuPVAX00K7BYXerj4g-_a9O-fZAn2GgePHukQ7n6CPD-DC0kVyx2I5FvA8xif8nNe-_F-gBcsWli5LPW6Lt5Qdyj2ebtiv66HqeS564vEHrN1s3g | 63 KB | 34 KB (54%) | ✓ | 3rd |
| https://www.sante.fr/libraries/tarteaucitron/tarteaucitron.services.js?v=20230203 | 46 KB | 33 KB (71%) | ✗ | 3rd |
| https://www.sante.fr/sites/default/files/js/js_zEOGMsrZ2jGaquYaC4lBNhUjFGBT7eVJct7bCLMnpXs.js?scope=footer&delta=0&language=fr&theme=santefr&include=eJyFU1GWgyAMvFAth9ivPQUvQrRsA_EFsOvtFytYt923_ZHMZIgmE80VrUssGoxhsY6D2qPzIBwSBnuKUE4NhJKiOoLzdlRBuYfqEVZ2RCY2kNbah7hliWMEWVQLKn9hjxOMqFpQeTcI-LX-7KwihIEw1RSj79HqBEZZyROQtuBo8Xx43asmcg7WEOfWpnAuzyRgri6M6i_yfIcN1XsJZJ1L1salMjjVWKPBDiz-rQxzGaaD8FYoI8BbUQwwTe4b6T_l3b7Z4Q1b93vfY4LW2ZzxK-5GdBFBzKXri5PXX4rNm-5OdQfPtuwkOGNYvWgVXiSVvyBYlK4H2bKDKMNEMEXcibIuPVAX00K7BYXerj4g-_a9O-fZAn2GgePHukQ7n6CPD-DC0kVyx2I5FvA8xif8nNe-_F-gBcsWli5LPW6Lt5Qdyj2ebtiv66HqeS564vEHrN1s3g | 31 KB | 25 KB (81%) | ✓ | 3rd |
| https://www.sante.fr/modules/custom/sante_glossary/js/sris-gp-abecedaire.js?tdl98j | 3 KB | — | ✓ | 3rd |
| https://www.sante.fr/libraries/tarteaucitron/tarteaucitron.js?v=0 | 26 KB | — | ✗ | 3rd |
| https://www.sante.fr/sites/default/files/js/js_Gzare1yQqxP3n6fMrwjQY6hgpCw6Lh3On4SOdz_b4FA.js?scope=footer&delta=7&language=fr&theme=santefr&include=eJyFU1GWgyAMvFAth9ivPQUvQrRsA_EFsOvtFytYt923_ZHMZIgmE80VrUssGoxhsY6D2qPzIBwSBnuKUE4NhJKiOoLzdlRBuYfqEVZ2RCY2kNbah7hliWMEWVQLKn9hjxOMqFpQeTcI-LX-7KwihIEw1RSj79HqBEZZyROQtuBo8Xx43asmcg7WEOfWpnAuzyRgri6M6i_yfIcN1XsJZJ1L1salMjjVWKPBDiz-rQxzGaaD8FYoI8BbUQwwTe4b6T_l3b7Z4Q1b93vfY4LW2ZzxK-5GdBFBzKXri5PXX4rNm-5OdQfPtuwkOGNYvWgVXiSVvyBYlK4H2bKDKMNEMEXcibIuPVAX00K7BYXerj4g-_a9O-fZAn2GgePHukQ7n6CPD-DC0kVyx2I5FvA8xif8nNe-_F-gBcsWli5LPW6Lt5Qdyj2ebtiv66HqeS564vEHrN1s3g | 9 KB | — | ✓ | 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 InventoryAction60 resources · 3.0 MB · 505 KB savings availableFIX
~505.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 60 resources | 3.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization18 images, 0 KB saveableREVIEW
BJS Execution Cost513ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.sante.fr/sites/default/files/js/js_-3sI6rWN3w5Z_R8CBS0AZB-NSdzaZEJqZrUN2Y1F6zE.js?scope=header&delta=1&language=fr&theme=santefr&include=eJyFU1GWgyAMvFAth9ivPQUvQrRsA_EFsOvtFytYt923_ZHMZIgmE80VrUssGoxhsY6D2qPzIBwSBnuKUE4NhJKiOoLzdlRBuYfqEVZ2RCY2kNbah7hliWMEWVQLKn9hjxOMqFpQeTcI-LX-7KwihIEw1RSj79HqBEZZyROQtuBo8Xx43asmcg7WEOfWpnAuzyRgri6M6i_yfIcN1XsJZJ1L1salMjjVWKPBDiz-rQxzGaaD8FYoI8BbUQwwTe4b6T_l3b7Z4Q1b93vfY4LW2ZzxK-5GdBFBzKXri5PXX4rNm-5OdQfPtuwkOGNYvWgVXiSVvyBYlK4H2bKDKMNEMEXcibIuPVAX00K7BYXerj4g-_a9O-fZAn2GgePHukQ7n6CPD-DC0kVyx2I5FvA8xif8nNe-_F-gBcsWli5LPW6Lt5Qdyj2ebtiv66HqeS564vEHrN1s3g | 219ms | 200ms | 2ms | 3rd |
| https://www.sante.fr/ | 142ms | 2ms | 0ms | 3rd |
| https://www.sante.fr/modules/custom/sante_vuejs/vue-core/dist/js/chunk-common.js?tdl98j | 85ms | 73ms | 10ms | 3rd |
| Unattributable | 66ms | 1ms | 0ms | 3rd |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading8 fonts (186 KB)PASS
Web fonts
8
186 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~16 KB and ~32 ms
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: OVHcloud
Network Waterfall60 requests over 2610msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.sante.fr www.sante.fr | Other | 219ms | 47 KB | — | €1/mo | Costly |
www.sante.fr www.sante.fr | Other | 142ms | 11 KB | — | €1/mo | Optional |
www.sante.fr www.sante.fr | Other | 85ms | 109 KB | 85% | €0/mo | Optional |
Unattributable Unattributable | Other | 66ms | 0 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- www.sante.fr adds 219ms and costs ~€1/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.sante.fr takes 219ms 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
85% of www.sante.fr'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