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.
1.40 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.22 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
295 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.004
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.63 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.
5.46 s
Page Load Progression
DPage Weight BudgetAction2.3 MB transferred, 151 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 ImpactAction93% third-party, 0 ms blockingFIX
FJS BundlesAction55 scripts, 584 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.hubvisor.io/wrapper/01E0DNHSFZ6JW0H5E612X8P17T/hubvisor.js | 256 KB | 152 KB (59%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604210101/pubads_impl.js?cb=31098008 | 188 KB | 132 KB (70%) | ✓ | 3rd |
| https://t.la-croix.com/gtm.js?id=GTM-P9MJDQMM | 236 KB | 80 KB (34%) | ✓ | 3rd |
| https://la-croix.com/metrics/gtag/js?id=G-CB77PEKJ0H&cx=c>m=4e64k1h1&sign=c5b182c5891811a1c65b25cf9883f8c2c86d219c123355c84b8d31f89e3c10a1_20260422 | 170 KB | 65 KB (38%) | ✓ | 1st |
| https://t.bayard.io/gtag/js?id=G-1KYSRH2EDD&cx=c>m=4e64k1h1&sign=c5b182c5891811a1c65b25cf9883f8c2c86d219c123355c84b8d31f89e3c10a1_20260422 | 146 KB | 62 KB (43%) | ✓ | 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=8303 | 59 KB | 26 KB (45%) | ✓ | 3rd |
| https://sdk.mrf.io/statics/47bd3e88b6bda15c34ce.js | 24 KB | 22 KB (92%) | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/src_sdk_core_modules_integrations_sdk-integrations_providers_gcm_gcm_js.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 1 KB | — | ✓ | 3rd |
| https://www.la-croix.com/assets/build/structure/layout/authentication.1646a74e.js | 2 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 InventoryAction151 resources · 2.3 MB · 584 KB savings availableFIX
~583.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 151 resources | 2.3 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction38 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
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
CJS Execution CostAction1677ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 424ms | 130ms | 0ms | 3rd |
| https://www.la-croix.com/ | 354ms | 9ms | 1ms | 3rd |
| https://cdn.hubvisor.io/wrapper/01E0DNHSFZ6JW0H5E612X8P17T/hubvisor.js | 153ms | 119ms | 31ms | 3rd |
| https://t.la-croix.com/gtm.js?id=GTM-P9MJDQMM | 147ms | 124ms | 18ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-fr-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 124ms | 102ms | 9ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604210101/pubads_impl.js?cb=31098008 | 118ms | 73ms | 19ms | 3rd |
| https://la-croix.com/metrics/gtag/js?id=G-CB77PEKJ0H&cx=c>m=4e64k1h1&sign=c5b182c5891811a1c65b25cf9883f8c2c86d219c123355c84b8d31f89e3c10a1_20260422 | 118ms | 99ms | 18ms | 1st |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 107ms | 86ms | 13ms | 3rd |
| https://t.bayard.io/gtag/js?id=G-1KYSRH2EDD&cx=c>m=4e64k1h1&sign=c5b182c5891811a1c65b25cf9883f8c2c86d219c123355c84b8d31f89e3c10a1_20260422 | 75ms | 60ms | 13ms | 3rd |
| https://via.batch.com/4.3.1/sdk.min.js | 57ms | 43ms | 8ms | 3rd |
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 Loading6 fonts (121 KB)PASS
Web fonts
6
121 KB total
Render-blocking
0
of 6
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
Network Waterfall151 requests over 4685msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 424ms | 0 KB | — | €2/mo | Costly |
www.la-croix.com www.la-croix.com | Other | 354ms | 56 KB | — | €2/mo | Costly |
cdn.hubvisor.io cdn.hubvisor.io | Other | 153ms | 256 KB | 59% | €1/mo | Optional |
t.la-croix.com t.la-croix.com | Other | 147ms | 236 KB | 34% | €1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 124ms | 56 KB | — | €1/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 118ms | 188 KB | 70% | €1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 107ms | 102 KB | 43% | €1/mo | Optional |
t.bayard.io t.bayard.io | Other | 75ms | 146 KB | 43% | €0/mo | Optional |
via.batch.com via.batch.com | Other | 57ms | 35 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 424ms and costs ~€2/month
- www.la-croix.com adds 354ms and costs ~€2/month
93% 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
Unattributable takes 424ms 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.la-croix.com takes 354ms 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
59% of cdn.hubvisor.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
70% 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