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.
1.34 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.18 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
248 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.003
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.49 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.
4.51 s
Page Load Progression
FPage Weight BudgetAction4.2 MB transferred, 122 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 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=4e64k1h1 | 134 KB | 70 KB (52%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-1007880560&cx=c>m=4e64k1h1 | 138 KB | 69 KB (50%) | ✓ | 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=4e64k1h1 | 130 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 InventoryAction122 resources · 4.2 MB · 947 KB savings availableFIX
~947.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 122 resources | 4.2 MiB | ||||||
CImage OptimizationAction37 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
CJS Execution CostAction1171ms total JS executionREVIEW
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 | 435ms | 366ms | 1ms | 3rd |
| Unattributable | 210ms | 8ms | 0ms | 3rd |
| https://www.shangri-la.com/fe-static/sl-fe-revamp-prod/_next/static/chunks/pages/_app-02c08414562b4755.js | 175ms | 111ms | 64ms | 3rd |
| https://www.shangri-la.com/en/ | 143ms | 14ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-59KZD4 | 81ms | 69ms | 10ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js | 72ms | 60ms | 10ms | 3rd |
| https://www.shangri-la.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 56ms | 53ms | 0ms | 3rd |
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 HintsNo optimization neededPASS
AHTTP Cachingmax-age=86400 (1 day)PASS
max-age=86400
| Directive | Value | Meaning |
|---|---|---|
| max-age | 86400 | Cache for 1 day |
Network Waterfall122 requests over 3760msINFO
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 | 435ms | 11 KB | — | ¥21/mo | Costly |
Unattributable Unattributable | Other | 210ms | 0 KB | — | ¥10/mo | Costly |
www.shangri-la.com www.shangri-la.com | Other | 175ms | 711 KB | 41% | ¥9/mo | Optional |
www.shangri-la.com www.shangri-la.com | Other | 143ms | 22 KB | — | ¥7/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 81ms | 168 KB | 41% | ¥4/mo | Optional |
analytics.tiktok.com analytics.tiktok.com | Other | 72ms | 110 KB | 50% | ¥4/mo | Optional |
www.shangri-la.com www.shangri-la.com | Other | 56ms | 0 KB | — | ¥3/mo | Optional |
These scripts may cost more than they're worth
- www.shangri-la.com adds 435ms and costs ~¥21/month
- Unattributable adds 210ms 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 435ms 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 210ms 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 analytics.tiktok.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