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.
1.13 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.67 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
397 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.138
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.76 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.
6.46 s
Page Load Progression
FPage Weight BudgetAction6.7 MB transferred, 185 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
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
DJS Execution CostAction2674ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.ihg.com/resources/us/es/booking-component/v3.19.2/ihg-booking-component.js | 1261ms | 775ms | 40ms | 3rd |
| https://www.ihg.com/cdn/vendor/appdynamics/adrum/adrum.js | 318ms | 230ms | 2ms | 3rd |
| https://assets.adobedtm.com/da3424fdbc19/cba4236ebe4a/launch-dccf471f969b.min.js | 286ms | 223ms | 43ms | 3rd |
| Unattributable | 205ms | 8ms | 0ms | 3rd |
| https://www.ihg.com/hotels/us/es/reservation | 185ms | 9ms | 1ms | 3rd |
| https://www.ihg.com/QKn3hQjsd_hfQZoGcQ/auuuJSOikOa5kX/MmxYFhMB/fAsQaHcX/JSgB | 153ms | 136ms | 9ms | 3rd |
| https://www.ihg.com/etc.clientlibs/clientlibs/granite/jquery.min.202604100001.js | 126ms | 109ms | 6ms | 3rd |
| https://www.ihg.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-base.min.202604100001.js | 83ms | 55ms | 27ms | 3rd |
| https://www.ihg.com/etc/clientlibs/static/uhf/brands/us/es/uhf.min.2026041002.js | 56ms | 18ms | 11ms | 3rd |
FJS BundlesAction59 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.ihg.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-base.min.202604100001.js | 345 KB | 253 KB (74%) | ✓ | 3rd |
| https://www.ihg.com/resources/us/es/booking-component/v3.19.2/ihg-booking-component.js | 485 KB | 196 KB (40%) | ✓ | 3rd |
| https://messenger-ui.usw.ivastudio.ai/ivas-messenger-ui.min.js | 332 KB | 167 KB (51%) | ✓ | 3rd |
| https://identity.ihg.com/js/gigya.js?apikey=4_jpzahMO4CBnl9Elopzfr0A&lang=es-us | 238 KB | 149 KB (62%) | ✓ | 3rd |
| https://www.ihg.com/etc/clientlibs/static/uhf/brands/us/es/uhf.min.2026041002.js | 125 KB | 80 KB (65%) | ✗ | 3rd |
| https://unpkg.com/adaptivecards@3.0.1/dist/adaptivecards.min.js | 98 KB | 73 KB (74%) | ✓ | 3rd |
| https://assets.adobedtm.com/da3424fdbc19/cba4236ebe4a/launch-dccf471f969b.min.js | 247 KB | 40 KB (16%) | ✓ | 3rd |
| https://www.ihg.com/QKn3hQjsd_hfQZoGcQ/auuuJSOikOa5kX/MmxYFhMB/fAsQaHcX/JSgB | 181 KB | 38 KB (21%) | ✓ | 3rd |
| https://www.ihg.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-initial.min.202604100001.js | 47 KB | 26 KB (58%) | ✓ | 3rd |
| https://consent.trustarc.com/asset/notice.js/v/v1.7-1729 | 36 KB | 25 KB (71%) | ✓ | 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 InventoryAction185 resources · 6.7 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 185 resources | 6.7 MiB | ||||||
CImage OptimizationAction62 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
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
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 Loading13 fonts (920 KB)PASS
Web fonts
13
920 KB total
Render-blocking
0
of 13
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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~369 KB and ~738 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
AHTTP Cachingmax-age=14400 (4 hours)PASS
max-age=14400
| Directive | Value | Meaning |
|---|---|---|
| max-age | 14400 | Cache for 4 hours |
Network Waterfall185 requests over 6499msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.ihg.com www.ihg.com | Other | 1261ms | 485 KB | 40% | $17/mo | Costly |
www.ihg.com www.ihg.com | Other | 318ms | 43 KB | — | $4/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 286ms | 247 KB | 16% | $4/mo | Costly |
Unattributable Unattributable | Other | 205ms | 0 KB | — | $3/mo | Costly |
www.ihg.com www.ihg.com | Other | 185ms | 31 KB | — | $2/mo | Optional |
www.ihg.com www.ihg.com | Other | 153ms | 2 KB | 21% | $2/mo | Optional |
www.ihg.com www.ihg.com | Other | 126ms | 37 KB | — | $2/mo | Optional |
www.ihg.com www.ihg.com | Other | 83ms | 345 KB | 74% | $1/mo | Optional |
www.ihg.com www.ihg.com | Other | 56ms | 125 KB | 65% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.ihg.com adds 1261ms and costs ~$17/month
- www.ihg.com adds 318ms and costs ~$4/month
- assets.adobedtm.com adds 286ms and costs ~$4/month
- Unattributable adds 205ms 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
www.ihg.com takes 1261ms 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.ihg.com takes 318ms 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 286ms 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 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
74% of www.ihg.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
65% of www.ihg.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