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.
2.38 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.55 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
904 ms
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.
3.89 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.
12.61 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 sDThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4240ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.doctissimo.fr/ | 1377ms | 376ms | 18ms | 3rd |
| Unattributable | 754ms | 165ms | 0ms | 3rd |
| https://www.flashb.id/assets/js/hbdbrk_82c906e59848d3c7d2c9_m.js | 457ms | 344ms | 86ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WNSJT2NK | 350ms | 259ms | 46ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-fr-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 311ms | 215ms | 21ms | 3rd |
| https://www.doctissimo.fr/wp-content/themes/doctissimo/assets/dependencies/swiper/swiper.min.js?ver=1943 | 306ms | 23ms | 12ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 303ms | 269ms | 32ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PGLVR9V&l=unify_dataSlayer | 245ms | 195ms | 46ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/src_sdk_core_modules_integrations_sdk-integrations_providers_gcm_gcm_js.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 139ms | 138ms | 0ms | 3rd |
DJS BundlesAction29 scripts, 347 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.flashb.id/assets/js/hbdbrk_82c906e59848d3c7d2c9_m.js | 182 KB | 104 KB (57%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WNSJT2NK | 146 KB | 65 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PGLVR9V&l=unify_dataSlayer | 149 KB | 58 KB (39%) | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 102 KB | 44 KB (43%) | ✓ | 3rd |
| https://sdk.mrf.io/statics/marfeel-sdk.js?id=1026 | 60 KB | 29 KB (49%) | ✓ | 3rd |
| https://www.doctissimo.fr/wp-content/themes/doctissimo/assets/dependencies/swiper/swiper.min.js?ver=1943 | 41 KB | 26 KB (64%) | ✓ | 3rd |
| https://www.doctissimo.fr/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 30 KB | 21 KB (71%) | ✓ | 3rd |
| https://sdk.privacy-center.org/1c7a6a97-5c7c-4b1d-8ea2-9ffa2349a26b/loader.js?target=www.doctissimo.fr | 60 KB | — | ✓ | 3rd |
| https://www.doctissimo.fr/wp-content/themes/reworldmedia/assets/javascripts/bootstrap/jquery.touchSwipe.min.js?ver=1943 | 4 KB | — | ✓ | 3rd |
| https://www.doctissimo.fr/wp-content/themes/reworldmedia/assets/javascripts/ads/ads.js | 0 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
DPage Weight InventoryAction115 resources · 1.7 MB · 347 KB savings availableFIX
~347.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 115 resources | 1.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.7 MB transferred, 115 requestsREVIEW
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
BImage Optimization68 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 Loading1 fonts (50 KB)PASS
Web fonts
1
50 KB total
Render-blocking
0
of 1
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 Hints10 hints, 0 missing preconnectsPASS
Current Resource Hints
10 resource hints configured
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
Network Waterfall115 requests over 3102msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.doctissimo.fr www.doctissimo.fr | Other | 1377ms | 74 KB | — | €15/mo | Costly |
Unattributable Unattributable | Other | 754ms | 0 KB | — | €8/mo | Costly |
www.flashb.id www.flashb.id | Other | 457ms | 182 KB | 57% | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 350ms | 146 KB | 45% | €4/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 311ms | 54 KB | — | €3/mo | Costly |
www.doctissimo.fr www.doctissimo.fr | Other | 306ms | 41 KB | 64% | €3/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 303ms | 102 KB | 43% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 245ms | 149 KB | 39% | €3/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 139ms | 1 KB | — | €2/mo | Optional |
These scripts may cost more than they're worth
- www.doctissimo.fr adds 1377ms and costs ~€15/month
- Unattributable adds 754ms and costs ~€8/month
- www.flashb.id adds 457ms and costs ~€5/month
- Google Tag Manager adds 350ms and costs ~€4/month
- sdk.privacy-center.org adds 311ms and costs ~€3/month
- www.doctissimo.fr adds 306ms and costs ~€3/month
- sdk.privacy-center.org adds 303ms and costs ~€3/month
- Google Tag Manager adds 245ms 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.doctissimo.fr takes 1377ms 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 754ms 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.flashb.id takes 457ms 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
57% of www.flashb.id'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 350ms 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 311ms 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.doctissimo.fr 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
64% of www.doctissimo.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
sdk.privacy-center.org takes 303ms 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 245ms 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