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.
989 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.81 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
8 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.163
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.31 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.
2.79 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction166 resources · 1.8 MB · 178 KB savings availableFIX
~177.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 166 resources | 1.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.8 MB transferred, 166 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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
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 Optimization35 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
BJS Execution Cost937ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.ovhcloud.com/fr/ | 405ms | 5ms | 0ms | 3rd |
| Unattributable | 225ms | 24ms | 0ms | 3rd |
| https://www.ovhcloud.com/sites/default/files/js/js_HbEl8_uwf6cOhpo210XR1alS2-CFKDhmVBw935Wtbjg.js | 96ms | 43ms | 4ms | 3rd |
| https://www.ovhcloud.com/modules/custom/ovh_sentry/dist/sentry.min.js?v=1.0.3 | 80ms | 21ms | 0ms | 3rd |
| https://www.ovhcloud.com/_next-menu/_next/static/chunks/framework-d7de93249215fb06.js | 69ms | 65ms | 4ms | 3rd |
| https://analytics.ovh.com/ovh/ovh_delta.js | 62ms | 44ms | 15ms | 3rd |
CJS BundlesAction85 scripts, 178 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.ovhcloud.com/7af16cdb/contrib/ovh_theme_patternlab/dist/odss-header/header--webcloud.min.js?v=1.0.2 | 60 KB | 60 KB (100%) | ✓ | 3rd |
| https://analytics.ovh.com/ovh/ovh_delta.js | 101 KB | 43 KB (42%) | ✓ | 3rd |
| https://www.ovhcloud.com/_next-menu/_next/static/chunks/framework-d7de93249215fb06.js | 60 KB | 26 KB (44%) | ✓ | 3rd |
| https://www.ovhcloud.com/sites/default/files/js/js_HbEl8_uwf6cOhpo210XR1alS2-CFKDhmVBw935Wtbjg.js | 60 KB | 26 KB (44%) | ✓ | 3rd |
| https://www.ovhcloud.com/website/webcallback/assets/__federation_shared_react-dom.js | 44 KB | 23 KB (53%) | ✓ | 3rd |
| https://www.ovhcloud.com/7af16cdb/contrib/ovh_theme_patternlab/dist/js/ods-olu.min.js?v=1.0.3 | 1 KB | — | ✓ | 3rd |
| https://www.ovhcloud.com/7af16cdb/contrib/ovh_theme_patternlab/dist/odss-slider/odss-slider.min.js?v=1.1.5 | 1 KB | — | ✓ | 3rd |
| https://www.ovhcloud.com/sites/default/files/js/js_w6Z5GBi6dWMNbIGrb0uEelvcydyISKc2rxojrEgelAg.js | 22 KB | — | ✓ | 3rd |
| https://www.ovhcloud.com/7af16cdb/contrib/ovh_theme_patternlab/dist/ods-header/ods-header.min.js?v=1.0.21 | 7 KB | — | ✓ | 3rd |
| https://www.ovhcloud.com/7af16cdb/contrib/ovh_theme_patternlab/dist/ods-header/ods-header-universe.min.js?v=1.0.21 | 3 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading8 fonts (376 KB)PASS
Web fonts
8
376 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~157 KB and ~314 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 Waterfall166 requests over 1766msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.ovhcloud.com www.ovhcloud.com | Other | 405ms | 80 KB | — | €2/mo | Costly |
Unattributable Unattributable | Other | 225ms | 0 KB | — | €1/mo | Costly |
www.ovhcloud.com www.ovhcloud.com | Other | 96ms | 60 KB | 44% | €0/mo | Optional |
www.ovhcloud.com www.ovhcloud.com | Other | 80ms | 40 KB | — | €0/mo | Optional |
www.ovhcloud.com www.ovhcloud.com | Other | 69ms | 60 KB | 44% | €0/mo | Optional |
analytics.ovh.com analytics.ovh.com | Other | 62ms | 101 KB | 42% | €0/mo | Optional |
These scripts may cost more than they're worth
- www.ovhcloud.com adds 405ms and costs ~€2/month
- Unattributable adds 225ms 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.ovhcloud.com takes 405ms 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 225ms 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