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.
2.77 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.78 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.39 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.021
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.97 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.
18.17 s
Page Load Progression
FPage Weight BudgetAction3.6 MB transferred, 174 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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
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 ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction16194ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://a0.muscache.com/airbnb/static/packages/web/common/2ce9.aee8e73ff5.js | 2117ms | 1702ms | 20ms | 3rd |
| https://www.airbnb.fr/ | 1975ms | 390ms | 8ms | 3rd |
| Unattributable | 1681ms | 171ms | 0ms | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/fr/e77e.f8ee2c81a0.js | 1512ms | 1114ms | 12ms | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/fr/bf69.798ec593ca.js | 1029ms | 269ms | 28ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-46MK | 934ms | 825ms | 99ms | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/common/4f8d.f846dfa32e.js | 895ms | 119ms | 26ms | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/common/c3cb.0b3de42380.js | 618ms | 549ms | 48ms | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/fr/frontend/core-guest-loop/apps/core-guest-spa/client.6021e8d8f6.js | 601ms | 540ms | 57ms | 3rd |
| https://d0a7e.airbnb.com/tags.js | 545ms | 426ms | 28ms | 3rd |
Showing top 10 of 33 scripts
DJS BundlesAction77 scripts, 301 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-2P6Q8PGG16&cx=c>m=4e64e1 | 164 KB | 66 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-46MK | 175 KB | 55 KB (31%) | ✓ | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/fr/frontend/onboarding/components/actionTray/ActionTrayContainer.8341e972f0.js | 36 KB | 31 KB (86%) | ✓ | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/common/4f8d.f846dfa32e.js | 53 KB | 29 KB (56%) | ✓ | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/fr/frontend/core-guest-loop/apps/core-guest-spa/client.6021e8d8f6.js | 99 KB | 25 KB (26%) | ✓ | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/fr/frontend/stays-search/routes/StaysSearchRoute/StaysSearchRoute.1f38274fe1.js | 36 KB | 24 KB (67%) | ✓ | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/fr/6497.fc75b115a6.js | 36 KB | 24 KB (68%) | ✓ | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/fr/cfe2.97ba1f4311.js | 46 KB | 23 KB (51%) | ✓ | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/common/c3cb.0b3de42380.js | 93 KB | 22 KB (24%) | ✓ | 3rd |
| https://a0.muscache.com/airbnb/static/packages/web/common/d669.944cb64345.js | 20 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 InventoryAction174 resources · 3.6 MB · 301 KB savings availableFIX
~301.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 174 resources | 3.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization56 images, 0 KB saveablePASS
A+Font Loading1 fonts (0 KB)PASS
Web fonts
1
0 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 Hints41 hints, 0 missing preconnectsPASS
Current Resource Hints
41 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall174 requests over 7268msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
a0.muscache.com a0.muscache.com | Other | 2117ms | 42 KB | — | €23/mo | Costly |
www.airbnb.fr www.airbnb.fr | Other | 1975ms | 89 KB | — | €21/mo | Costly |
Unattributable Unattributable | Other | 1681ms | 0 KB | — | €18/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 1512ms | 22 KB | — | €16/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 1029ms | 35 KB | — | €11/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 934ms | 175 KB | 31% | €10/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 895ms | 53 KB | 56% | €10/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 618ms | 93 KB | 24% | €7/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 601ms | 99 KB | 26% | €7/mo | Costly |
d0a7e.airbnb.com d0a7e.airbnb.com | Other | 545ms | 42 KB | — | €6/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 495ms | 5 KB | — | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 479ms | 164 KB | 40% | €5/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 437ms | 9 KB | — | €5/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 345ms | 10 KB | — | €4/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 323ms | 313 KB | — | €4/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 266ms | 19 KB | — | €3/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 218ms | 36 KB | — | €2/mo | Costly |
a0.muscache.com a0.muscache.com | Other | 187ms | 20 KB | — | €2/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 186ms | 19 KB | — | €2/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 158ms | 16 KB | — | €2/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 158ms | 3 KB | — | €2/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 133ms | 13 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 121ms | 29 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 111ms | 36 KB | 68% | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 103ms | 111 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 95ms | 21 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 86ms | 14 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 71ms | 18 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 68ms | 18 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 68ms | 16 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 66ms | 15 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 59ms | 6 KB | — | €1/mo | Optional |
a0.muscache.com a0.muscache.com | Other | 55ms | 12 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- a0.muscache.com adds 2117ms and costs ~€23/month
- www.airbnb.fr adds 1975ms and costs ~€21/month
- Unattributable adds 1681ms and costs ~€18/month
- a0.muscache.com adds 1512ms and costs ~€16/month
- a0.muscache.com adds 1029ms and costs ~€11/month
- Google Tag Manager adds 934ms and costs ~€10/month
- a0.muscache.com adds 895ms and costs ~€10/month
- a0.muscache.com adds 618ms and costs ~€7/month
- a0.muscache.com adds 601ms and costs ~€7/month
- d0a7e.airbnb.com adds 545ms and costs ~€6/month
- a0.muscache.com adds 495ms and costs ~€5/month
- Google Tag Manager adds 479ms and costs ~€5/month
- a0.muscache.com adds 437ms and costs ~€5/month
- a0.muscache.com adds 345ms and costs ~€4/month
- a0.muscache.com adds 323ms and costs ~€4/month
- a0.muscache.com adds 266ms and costs ~€3/month
- a0.muscache.com adds 218ms and costs ~€2/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
a0.muscache.com takes 2117ms 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.airbnb.fr takes 1975ms 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 1681ms 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
a0.muscache.com takes 1512ms 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
a0.muscache.com takes 1029ms 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
Google Tag Manager takes 934ms 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
a0.muscache.com takes 895ms 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
56% of a0.muscache.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
a0.muscache.com takes 618ms 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
a0.muscache.com takes 601ms 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
d0a7e.airbnb.com takes 545ms 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
a0.muscache.com takes 495ms 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
Google Tag Manager takes 479ms 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
a0.muscache.com takes 437ms 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
a0.muscache.com takes 345ms 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
a0.muscache.com 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
a0.muscache.com takes 266ms 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
a0.muscache.com takes 218ms 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 a0.muscache.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