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.
616 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.63 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
20 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.071
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.34 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.
2.65 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
DJS BundlesAction27 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 | 105 KB (58%) | ✓ | 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 | 43 KB (42%) | ✓ | 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 (65%) | ✓ | 3rd |
| https://www.doctissimo.fr/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 30 KB | 21 KB (71%) | ✓ | 3rd |
| https://www.doctissimo.fr/wp-content/plugins/wp-rocket/assets/js/wpr-beacon.min.js | 8 KB | — | ✓ | 3rd |
| https://assets.sparteo.com/dependencies.js | 2 KB | — | ✓ | 3rd |
| https://www.doctissimo.fr/wp-content/themes/reworldmedia/assets/javascripts/common-utils-v2.js?ver=1943 | 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
DPage Weight InventoryAction118 resources · 1.6 MB · 347 KB savings availableFIX
~347.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 118 resources | 1.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.6 MB transferred, 118 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 Optimization72 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
BJS Execution Cost954ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.doctissimo.fr/ | 323ms | 99ms | 4ms | 3rd |
| Unattributable | 163ms | 29ms | 0ms | 3rd |
| https://www.flashb.id/assets/js/hbdbrk_82c906e59848d3c7d2c9_m.js | 97ms | 75ms | 16ms | 3rd |
| https://www.doctissimo.fr/wp-content/themes/doctissimo/assets/dependencies/swiper/swiper.min.js?ver=1943 | 93ms | 11ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WNSJT2NK | 80ms | 58ms | 11ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-fr-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 73ms | 54ms | 5ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 68ms | 52ms | 7ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PGLVR9V&l=unify_dataSlayer | 57ms | 46ms | 10ms | 3rd |
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 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
Network Waterfall118 requests over 3073msINFO
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 | 323ms | 80 KB | — | €4/mo | Costly |
Unattributable Unattributable | Other | 163ms | 0 KB | — | €2/mo | Optional |
www.flashb.id www.flashb.id | Other | 97ms | 182 KB | 58% | €1/mo | Optional |
www.doctissimo.fr www.doctissimo.fr | Other | 93ms | 41 KB | 65% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 80ms | 146 KB | 45% | €1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 73ms | 54 KB | — | €1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 68ms | 102 KB | 42% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 57ms | 149 KB | 39% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.doctissimo.fr adds 323ms 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.doctissimo.fr takes 323ms 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
58% 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
65% 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