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.
3.14 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.81 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
542 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.003
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.95 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.
6.83 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2848ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.vie-publique.fr/themes/custom/vp_dsfr/dsfr/dist/analytics/analytics.module.min.js?tditb3 | 736ms | 493ms | 1ms | 3rd |
| https://www.vie-publique.fr/ | 616ms | 15ms | 2ms | 3rd |
| Unattributable | 604ms | 10ms | 0ms | 3rd |
| https://www.vie-publique.fr/themes/custom/vp_dsfr/dsfr/dist/dsfr.module.min.js?v=1.x | 234ms | 189ms | 13ms | 3rd |
| https://www.vie-publique.fr/files/js/js_Af887Nld9rGW0hw9kx4Jm-YlXBOL-4MH1IU_2-fx8Ro.js?scope=footer&delta=1&language=fr&theme=vp_dsfr&include=eJxVjmsOhDAIhC-k2yM1rKXaBksD6Mbbb30m_mAI85GBgQVdkKUCfWAxHniuhIYdhehHYlWQzUVmQylN9A2mNE7UyvyPJZxw4hk9rljMvUeftWvncprRXd1T-koL6tbqg0Zxu_RQgDZLgz521v784XHugFT2z4AesKaA3F94d7PWEN2hx_YoYInLH7NBYyE | 220ms | 205ms | 14ms | 3rd |
| https://wzzn.vie-publique.fr/gtG690.js?2 | 128ms | 121ms | 6ms | 3rd |
| https://www.vie-publique.fr/files/js/js_bmT4v3sXuHGKbEKvWGX0l9pYXAfURI9ZeTWOvDGkmGM.js?scope=footer&delta=11&language=fr&theme=vp_dsfr&include=eJxVjmsOhDAIhC-k2yM1rKXaBksD6Mbbb30m_mAI85GBgQVdkKUCfWAxHniuhIYdhehHYlWQzUVmQylN9A2mNE7UyvyPJZxw4hk9rljMvUeftWvncprRXd1T-koL6tbqg0Zxu_RQgDZLgz521v784XHugFT2z4AesKaA3F94d7PWEN2hx_YoYInLH7NBYyE | 103ms | 83ms | 17ms | 3rd |
| https://www.vie-publique.fr/libraries/jspdf/dist/jspdf.min.js?tditb3 | 92ms | 45ms | 46ms | 3rd |
| https://www.vie-publique.fr/core/assets/vendor/jquery/jquery.min.js?v=4.0.0 | 61ms | 49ms | 11ms | 3rd |
| https://www.vie-publique.fr/modules/custom/vp_jspdf/dist/js/jspdf.init.min.js?v=1.2.x | 55ms | 14ms | 22ms | 3rd |
DHTTP CachingActionno-store (uncacheable)FIX
no-store
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
BImage Optimization27 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 Bundles14 scripts, 92 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.vie-publique.fr/libraries/jspdf/dist/jspdf.min.js?tditb3 | 91 KB | 71 KB (78%) | ✓ | 3rd |
| https://www.vie-publique.fr/files/js/js_Af887Nld9rGW0hw9kx4Jm-YlXBOL-4MH1IU_2-fx8Ro.js?scope=footer&delta=1&language=fr&theme=vp_dsfr&include=eJxVjmsOhDAIhC-k2yM1rKXaBksD6Mbbb30m_mAI85GBgQVdkKUCfWAxHniuhIYdhehHYlWQzUVmQylN9A2mNE7UyvyPJZxw4hk9rljMvUeftWvncprRXd1T-koL6tbqg0Zxu_RQgDZLgz521v784XHugFT2z4AesKaA3F94d7PWEN2hx_YoYInLH7NBYyE | 31 KB | 21 KB (68%) | ✓ | 3rd |
| https://www.vie-publique.fr/files/js/js_VjBOe-Ug1JZkBEZxRvkR1223LBfmDlbbEqXqMMCbqq0.js?scope=footer&delta=6&language=fr&theme=vp_dsfr&include=eJxVjmsOhDAIhC-k2yM1rKXaBksD6Mbbb30m_mAI85GBgQVdkKUCfWAxHniuhIYdhehHYlWQzUVmQylN9A2mNE7UyvyPJZxw4hk9rljMvUeftWvncprRXd1T-koL6tbqg0Zxu_RQgDZLgz521v784XHugFT2z4AesKaA3F94d7PWEN2hx_YoYInLH7NBYyE | 1 KB | — | ✓ | 3rd |
| https://www.vie-publique.fr/themes/custom/vp_dsfr/dsfr/dist/dsfr.module.min.js?v=1.x | 28 KB | — | ✓ | 3rd |
| https://www.vie-publique.fr/themes/custom/vp_dsfr/vendors/bootstrap/util.min.js?v=1.x | 2 KB | — | ✓ | 3rd |
| https://www.vie-publique.fr/themes/custom/vp_dsfr/vendors/bootstrap/collapse.min.js?v=1.x | 3 KB | — | ✓ | 3rd |
| https://www.vie-publique.fr/themes/custom/vp_dsfr/dsfr/dist/analytics/analytics.module.min.js?tditb3 | 17 KB | — | ✓ | 3rd |
| https://www.vie-publique.fr/themes/custom/vp_dsfr/js/ofi.min.js?v=1.x | 1 KB | — | ✓ | 3rd |
| https://www.vie-publique.fr/files/js/js_5pGNzyndIv9P7dxcP2bZN5Zlp4pPa3AYb8UDzrfGIl8.js?scope=footer&delta=8&language=fr&theme=vp_dsfr&include=eJxVjmsOhDAIhC-k2yM1rKXaBksD6Mbbb30m_mAI85GBgQVdkKUCfWAxHniuhIYdhehHYlWQzUVmQylN9A2mNE7UyvyPJZxw4hk9rljMvUeftWvncprRXd1T-koL6tbqg0Zxu_RQgDZLgz521v784XHugFT2z4AesKaA3F94d7PWEN2hx_YoYInLH7NBYyE | 3 KB | — | ✓ | 3rd |
| https://www.vie-publique.fr/files/js/js_bmT4v3sXuHGKbEKvWGX0l9pYXAfURI9ZeTWOvDGkmGM.js?scope=footer&delta=11&language=fr&theme=vp_dsfr&include=eJxVjmsOhDAIhC-k2yM1rKXaBksD6Mbbb30m_mAI85GBgQVdkKUCfWAxHniuhIYdhehHYlWQzUVmQylN9A2mNE7UyvyPJZxw4hk9rljMvUeftWvncprRXd1T-koL6tbqg0Zxu_RQgDZLgz521v784XHugFT2z4AesKaA3F94d7PWEN2hx_YoYInLH7NBYyE | 27 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
APage Weight Budget919 KB transferred, 62 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (166 KB)PASS
Web fonts
4
166 KB total
Render-blocking
0
of 4
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
APage Weight Inventory62 resources · 919 KB · 92 KB savings availablePASS
~92.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 62 resources | 919.1 KiB | ||||||
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: OVHcloud
Network Waterfall62 requests over 6045msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.vie-publique.fr www.vie-publique.fr | Other | 736ms | 17 KB | — | €3/mo | Costly |
www.vie-publique.fr www.vie-publique.fr | Other | 616ms | 21 KB | — | €3/mo | Costly |
Unattributable Unattributable | Other | 604ms | 0 KB | — | €3/mo | Costly |
www.vie-publique.fr www.vie-publique.fr | Other | 234ms | 28 KB | — | €1/mo | Costly |
www.vie-publique.fr www.vie-publique.fr | Other | 220ms | 31 KB | 68% | €1/mo | Costly |
wzzn.vie-publique.fr wzzn.vie-publique.fr | Other | 128ms | 14 KB | — | €1/mo | Optional |
www.vie-publique.fr www.vie-publique.fr | Other | 103ms | 27 KB | — | €0/mo | Optional |
www.vie-publique.fr www.vie-publique.fr | Other | 92ms | 91 KB | 78% | €0/mo | Optional |
www.vie-publique.fr www.vie-publique.fr | Other | 61ms | 27 KB | — | €0/mo | Optional |
www.vie-publique.fr www.vie-publique.fr | Other | 55ms | 61 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- www.vie-publique.fr adds 736ms and costs ~€3/month
- www.vie-publique.fr adds 616ms and costs ~€3/month
- Unattributable adds 604ms and costs ~€3/month
- www.vie-publique.fr adds 234ms and costs ~€1/month
- www.vie-publique.fr adds 220ms 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.vie-publique.fr takes 736ms 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.vie-publique.fr takes 616ms 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 604ms 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.vie-publique.fr takes 234ms 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.vie-publique.fr takes 220ms 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
68% of www.vie-publique.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
78% of www.vie-publique.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