Performance
· 16 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.
3.05 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.89 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.60 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.
3.05 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.
33.74 s
Page Load Progression
FPage Weight BudgetAction3.4 MB transferred, 232 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 Execution CostAction10563ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1621ms | 623ms | 0ms | 3rd |
| https://www.hilton.com/.well-known/sbsd/166fe1?v=6085f9f1-34a7-109c-cced-e4c9b655173f&t=93261714 | 1619ms | 1507ms | 71ms | 1st |
| https://assets.adobedtm.com/5e68f1ab8856/6f5249f15557/launch-EN02272261e0b845508227acf3ca0c37de.min.js | 1267ms | 1028ms | 168ms | 3rd |
| https://www.hilton.com/en/ | 528ms | 42ms | 4ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=AW-971189347&cx=c>m=4e6460 | 397ms | 335ms | 59ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-993646837&cx=c>m=4e6460 | 386ms | 305ms | 78ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-10820650235&cx=c>m=4e6460 | 377ms | 320ms | 53ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-2013561&cx=c>m=4e6460 | 308ms | 255ms | 50ms | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 306ms | 247ms | 57ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-860832387&cx=c>m=4e6460 | 295ms | 242ms | 51ms | 3rd |
Showing top 10 of 30 scripts
FJS BundlesAction103 scripts, 891 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://assets.adobedtm.com/5e68f1ab8856/6f5249f15557/launch-EN02272261e0b845508227acf3ca0c37de.min.js | 197 KB | 62 KB (31%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-10267146&cx=c>m=4e6460 | 129 KB | 59 KB (46%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-2391905&cx=c>m=4e6460 | 129 KB | 59 KB (46%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-5481501&cx=c>m=4e6460 | 129 KB | 58 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-860832387&cx=c>m=4e6460 | 139 KB | 55 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-995583242&cx=c>m=4e6460 | 133 KB | 54 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-949324871&cx=c>m=4e6460 | 133 KB | 54 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-753945958&cx=c>m=4e6460 | 136 KB | 54 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-993646837&cx=c>m=4e6460 | 136 KB | 54 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-2013561&cx=c>m=4e6460 | 131 KB | 53 KB (41%) | ✓ | 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
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization42 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 Loading11 fonts (42 KB)PASS
Web fonts
11
42 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 ~2 KB and ~4 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall232 requests over 0msINFO
Performance analysis not available for this result.
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1621ms | 0 KB | — | $22/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 1267ms | 197 KB | 31% | $17/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 397ms | 147 KB | 35% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 386ms | 136 KB | 40% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 377ms | 143 KB | 36% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 308ms | 131 KB | 41% | $4/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 306ms | 95 KB | 37% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 295ms | 139 KB | 39% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 292ms | 133 KB | 41% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 288ms | 133 KB | 40% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 274ms | 136 KB | 40% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 265ms | 133 KB | 41% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 248ms | 129 KB | 45% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 235ms | 144 KB | 36% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 229ms | 129 KB | 46% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 215ms | 129 KB | 46% | $3/mo | Costly |
js-cdn.dynatrace.com js-cdn.dynatrace.com | Other | 209ms | 67 KB | 38% | $3/mo | Costly |
Google Ads Conversion www.googleadservices.com | Advertising | 165ms | 65 KB | — | $2/mo | Optional |
apps.rokt-api.com apps.rokt-api.com | Other | 161ms | 61 KB | 50% | $2/mo | Optional |
apps.rokt.com apps.rokt.com | Other | 138ms | 21 KB | — | $2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 118ms | 39 KB | — | $2/mo | Optional |
s.pinimg.com s.pinimg.com | Other | 108ms | 27 KB | — | $1/mo | Optional |
sc-static.net sc-static.net | Other | 105ms | 25 KB | — | $1/mo | Optional |
Bing UET bat.bing.com | Advertising | 92ms | 15 KB | — | $1/mo | Optional |
LinkedIn Insight snap.licdn.com | Advertising | 90ms | 19 KB | — | $1/mo | Optional |
cdn.taboola.com cdn.taboola.com | Other | 90ms | 27 KB | — | $1/mo | Optional |
tag.rmp.rakuten.com tag.rmp.rakuten.com | Other | 69ms | 16 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1621ms and costs ~$22/month
- assets.adobedtm.com adds 1267ms and costs ~$17/month
- Google Tag Manager adds 397ms and costs ~$5/month
- Google Tag Manager adds 386ms and costs ~$5/month
- Google Tag Manager adds 377ms and costs ~$5/month
- Google Tag Manager adds 308ms and costs ~$4/month
- Facebook Pixel adds 306ms and costs ~$4/month
- Google Tag Manager adds 295ms and costs ~$4/month
- Google Tag Manager adds 292ms and costs ~$4/month
- Google Tag Manager adds 288ms and costs ~$4/month
- Google Tag Manager adds 274ms and costs ~$4/month
- Google Tag Manager adds 265ms and costs ~$4/month
- Google Tag Manager adds 248ms and costs ~$3/month
- Google Tag Manager adds 235ms and costs ~$3/month
- Google Tag Manager adds 229ms and costs ~$3/month
- Google Tag Manager adds 215ms and costs ~$3/month
- js-cdn.dynatrace.com adds 209ms and costs ~$3/month
79% 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 1621ms 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
assets.adobedtm.com takes 1267ms 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 397ms 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 386ms 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 377ms 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 308ms 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
Facebook Pixel takes 306ms 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 295ms 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 292ms 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 288ms 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 274ms 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 265ms 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 248ms 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 235ms 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 229ms 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 215ms 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
js-cdn.dynatrace.com takes 209ms 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
50% of apps.rokt-api.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