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.
6.50 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
26.95 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.00 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.
10.57 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.
27.31 s
Page Load Progression
FPage Weight BudgetAction4.8 MB transferred, 126 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
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
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
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 CostAction5600ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.shangri-la.com/fe-static/sl-fe-revamp-prod/_next/static/chunks/pages/home-b68aafd6b1dbfbc8.js | 1718ms | 1502ms | 7ms | 3rd |
| https://www.shangri-la.com/fe-static/sl-fe-revamp-prod/_next/static/chunks/pages/_app-02c08414562b4755.js | 753ms | 498ms | 254ms | 3rd |
| Unattributable | 717ms | 61ms | 0ms | 3rd |
| https://www.shangri-la.com/en/ | 317ms | 33ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-59KZD4 | 299ms | 249ms | 39ms | 3rd |
| https://www.shangri-la.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 234ms | 226ms | 2ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js | 205ms | 157ms | 45ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-1006266805&cx=c>m=4e64m0h2 | 149ms | 114ms | 33ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-4378683&cx=c>m=4e64m0h2 | 144ms | 113ms | 27ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-1007880560&cx=c>m=4e64m0h2 | 138ms | 104ms | 33ms | 3rd |
Showing top 10 of 20 scripts
FJS BundlesAction44 scripts, 947 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.shangri-la.com/fe-static/sl-fe-revamp-prod/_next/static/chunks/pages/_app-02c08414562b4755.js | 711 KB | 290 KB (41%) | ✓ | 3rd |
| https://www.shangri-la.com/fe-static/sl-fe-revamp-prod/_next/static/chunks/d6e1aeb5-376c412504769b81.js | 125 KB | 112 KB (90%) | ✓ | 3rd |
| https://www.shangri-la.com/fe-static/sl-fe-revamp-prod/_next/static/chunks/3546-024158113a799d62.js | 167 KB | 97 KB (58%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-1006266805&cx=c>m=4e64m0h2 | 134 KB | 70 KB (52%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-1007880560&cx=c>m=4e64m0h2 | 137 KB | 70 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-59KZD4 | 168 KB | 69 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-4378683&cx=c>m=4e64m0h2 | 129 KB | 66 KB (51%) | ✓ | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js | 110 KB | 55 KB (50%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 42 KB (43%) | ✓ | 3rd |
| https://www.shangri-la.com/fe-static/sl-fe-revamp-prod/_next/static/chunks/7240-7988866b776fe973.js | 35 KB | 28 KB (81%) | ✓ | 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 InventoryAction126 resources · 4.8 MB · 947 KB savings availableFIX
~947.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 126 resources | 4.8 MiB | ||||||
CImage OptimizationAction43 images, 0 KB saveableREVIEW
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
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
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
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
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
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
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
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 (425 KB)PASS
Web fonts
6
425 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~15 KB and ~30 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints3 hints, 0 missing preconnectsPASS
Current Resource Hints
3 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AHTTP Cachingmax-age=86400 (1 day)PASS
max-age=86400
| Directive | Value | Meaning |
|---|---|---|
| max-age | 86400 | Cache for 1 day |
Network Waterfall126 requests over 3890msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.shangri-la.com www.shangri-la.com | Other | 1718ms | 11 KB | — | ¥85/mo | Costly |
www.shangri-la.com www.shangri-la.com | Other | 753ms | 711 KB | 41% | ¥37/mo | Costly |
Unattributable Unattributable | Other | 717ms | 0 KB | — | ¥35/mo | Costly |
www.shangri-la.com www.shangri-la.com | Other | 317ms | 22 KB | — | ¥16/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 299ms | 168 KB | 41% | ¥15/mo | Costly |
www.shangri-la.com www.shangri-la.com | Other | 234ms | 0 KB | — | ¥12/mo | Costly |
analytics.tiktok.com analytics.tiktok.com | Other | 205ms | 110 KB | 50% | ¥10/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 149ms | 134 KB | 52% | ¥7/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 144ms | 129 KB | 51% | ¥7/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 138ms | 137 KB | 51% | ¥7/mo | Optional |
www.shangri-la.com www.shangri-la.com | Other | 135ms | 67 KB | 42% | ¥7/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 128ms | 63 KB | — | ¥6/mo | Optional |
www.shangri-la.com www.shangri-la.com | Other | 118ms | 46 KB | — | ¥6/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 112ms | 97 KB | 43% | ¥6/mo | Optional |
www.shangri-la.com www.shangri-la.com | Other | 110ms | 13 KB | — | ¥5/mo | Optional |
retcode.alicdn.com retcode.alicdn.com | Other | 71ms | 15 KB | — | ¥3/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 68ms | 47 KB | 46% | ¥3/mo | Optional |
www.shangri-la.com www.shangri-la.com | Other | 66ms | 11 KB | — | ¥3/mo | Optional |
www.shangri-la.com www.shangri-la.com | Other | 61ms | 167 KB | 58% | ¥3/mo | Optional |
s.shangri-la.com s.shangri-la.com | Other | 58ms | 8 KB | — | ¥3/mo | Optional |
These scripts may cost more than they're worth
- www.shangri-la.com adds 1718ms and costs ~¥85/month
- www.shangri-la.com adds 753ms and costs ~¥37/month
- Unattributable adds 717ms and costs ~¥35/month
- www.shangri-la.com adds 317ms and costs ~¥16/month
- Google Tag Manager adds 299ms and costs ~¥15/month
- www.shangri-la.com adds 234ms and costs ~¥12/month
- analytics.tiktok.com adds 205ms and costs ~¥10/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.shangri-la.com takes 1718ms 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.shangri-la.com takes 753ms 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 717ms 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.shangri-la.com takes 317ms 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 299ms 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.shangri-la.com takes 234ms 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
analytics.tiktok.com takes 205ms 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
52% of Google Tag Manager'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
51% of Google Tag Manager'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
51% of Google Tag Manager'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
58% of www.shangri-la.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