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.
1.28 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.98 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
7.52 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.71 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.
44.10 s
Page Load Progression
FPage Weight BudgetAction6.5 MB transferred, 112 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction44142ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://group.accor.com/_next/static/chunks/c15bf2b0-c59ed6c02f757fc5.js | 28864ms | 102ms | 1ms | 3rd |
| https://group.accor.com/_next/static/chunks/51749ec1.54f5f2f3b9acf3a7.js | 8443ms | 8238ms | 2ms | 3rd |
| https://group.accor.com/_next/static/chunks/4bd1b696-182b6b13bdad92e3.js | 3403ms | 85ms | 4ms | 3rd |
| https://group.accor.com/en | 1523ms | 5ms | 15ms | 3rd |
| https://group.accor.com/_next/static/chunks/1255-1e9a537968501932.js | 726ms | 626ms | 4ms | 3rd |
| https://group.accor.com/_next/static/chunks/2148.a48d3f619f597dd5.js | 561ms | 517ms | 1ms | 3rd |
| https://group.accor.com/_next/static/chunks/185.d6d0de56162b5123.js | 241ms | 174ms | 4ms | 3rd |
| Unattributable | 202ms | 23ms | 0ms | 3rd |
| https://group.accor.com/_next/static/chunks/872-af216dfa91992ef9.js | 98ms | 84ms | 9ms | 3rd |
| https://group.accor.com/_next/static/chunks/2502-4fd99ea510ded0c3.js | 82ms | 63ms | 6ms | 3rd |
DJS BundlesAction32 scripts, 383 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://group.accor.com/_next/static/chunks/872-af216dfa91992ef9.js | 127 KB | 101 KB (80%) | ✓ | 3rd |
| https://group.accor.com/_next/static/chunks/bd904a5c.43338207e237b2eb.js | 97 KB | 77 KB (80%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W36L8T4 | 133 KB | 65 KB (49%) | ✓ | 3rd |
| https://group.accor.com/_next/static/chunks/2502-4fd99ea510ded0c3.js | 77 KB | 47 KB (63%) | ✓ | 3rd |
| https://group.accor.com/_next/static/chunks/9453-fee74c89e4beede6.js | 108 KB | 42 KB (39%) | ✓ | 3rd |
| https://group.accor.com/_next/static/chunks/2691-33992894e472a810.js | 55 KB | 27 KB (49%) | ✓ | 3rd |
| https://group.accor.com/_next/static/chunks/2008-f8a13e9fb7412960.js | 40 KB | 23 KB (57%) | ✓ | 3rd |
| https://group.accor.com/_next/static/chunks/app/%5Blocale%5D/%5B...slug%5D/page-94b4cb273f86c8a6.js | 4 KB | — | ✓ | 3rd |
| https://group.accor.com/_next/static/chunks/app/%5Blocale%5D/page-51640a4862d3971c.js | 3 KB | — | ✓ | 3rd |
| https://group.accor.com/_next/static/chunks/5284-0d4839bea9f56531.js | 29 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 InventoryAction112 resources · 6.5 MB · 383 KB savings availableFIX
~383.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 112 resources | 6.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization44 images, 0 KB saveableREVIEW
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 Loading2 fonts (241 KB)PASS
Web fonts
2
241 KB total
Render-blocking
0
of 2
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
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 ~101 KB and ~202 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall112 requests over 43609msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
group.accor.com group.accor.com | Other | 28864ms | 20 KB | — | $383/mo | Costly |
group.accor.com group.accor.com | Other | 8443ms | 45 KB | — | $112/mo | Costly |
group.accor.com group.accor.com | Other | 3403ms | 53 KB | — | $45/mo | Costly |
group.accor.com group.accor.com | Other | 1523ms | 129 KB | — | $20/mo | Costly |
group.accor.com group.accor.com | Other | 726ms | 45 KB | — | $10/mo | Costly |
group.accor.com group.accor.com | Other | 561ms | 20 KB | — | $7/mo | Costly |
group.accor.com group.accor.com | Other | 241ms | 49 KB | — | $3/mo | Costly |
Unattributable Unattributable | Other | 202ms | 0 KB | — | $3/mo | Costly |
group.accor.com group.accor.com | Other | 98ms | 127 KB | 80% | $1/mo | Optional |
group.accor.com group.accor.com | Other | 82ms | 77 KB | 63% | $1/mo | Optional |
These scripts may cost more than they're worth
- group.accor.com adds 28864ms and costs ~$383/month
- group.accor.com adds 8443ms and costs ~$112/month
- group.accor.com adds 3403ms and costs ~$45/month
- group.accor.com adds 1523ms and costs ~$20/month
- group.accor.com adds 726ms and costs ~$10/month
- group.accor.com adds 561ms and costs ~$7/month
- group.accor.com adds 241ms and costs ~$3/month
- Unattributable adds 202ms 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
group.accor.com takes 28864ms 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
group.accor.com takes 8443ms 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
group.accor.com takes 3403ms 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
group.accor.com takes 1523ms 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
group.accor.com takes 726ms 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
group.accor.com takes 561ms 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
group.accor.com takes 241ms 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 202ms 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
80% of group.accor.com'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
63% of group.accor.com'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