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.
5.95 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
42.99 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
6.64 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.566
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
16.69 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.
43.64 s
Page Load Progression
FPage Weight BudgetAction10.3 MB transferred, 245 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
FJS Execution CostAction20052ms 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 | 10869ms | 9513ms | 201ms | 3rd |
| https://www.intercontinental.com/hotels/us/es/reservation | 1614ms | 46ms | 6ms | 3rd |
| https://assets.adobedtm.com/da3424fdbc19/cba4236ebe4a/launch-dccf471f969b.min.js | 1397ms | 1073ms | 206ms | 3rd |
| Unattributable | 1365ms | 52ms | 0ms | 3rd |
| https://www.intercontinental.com/cdn/vendor/appdynamics/adrum/adrum.js | 776ms | 469ms | 13ms | 3rd |
| https://www.intercontinental.com/uPkV/Clq1/k/t/rECJ5JiA/1upiGVat7JiXmJ9V9Q/TkcnSwE/S3s2UWEx/DBEB | 642ms | 575ms | 51ms | 3rd |
| https://www.intercontinental.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-intercontinental.min.202604220001.js | 641ms | 470ms | 108ms | 3rd |
| https://www.ihg.com/cdn/vendor/analytics/ihg-analytics/analytics.iife.js | 633ms | 79ms | 8ms | 3rd |
| https://www.intercontinental.com/etc.clientlibs/clientlibs/granite/jquery.min.202604220001.js | 552ms | 411ms | 30ms | 3rd |
| https://www.ihg.com/etc/clientlibs/static/uhf/brands/intercontinental/us/es/uhf.min.2026042202.js | 267ms | 100ms | 59ms | 3rd |
Showing top 10 of 21 scripts
FJS BundlesAction102 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.intercontinental.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-intercontinental.min.202604220001.js | 349 KB | 270 KB (78%) | ✓ | 3rd |
| https://www.ihg.com/resources/us/es/booking-component/v3.19.2/ihg-booking-component.js | 486 KB | 199 KB (41%) | ✓ | 3rd |
| https://messenger-ui.usw.ivastudio.ai/ivas-messenger-ui.min.js | 332 KB | 167 KB (51%) | ✓ | 3rd |
| https://identity.intercontinental.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/intercontinental/us/es/uhf.min.2026042202.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.intercontinental.com/uPkV/Clq1/k/t/rECJ5JiA/1upiGVat7JiXmJ9V9Q/TkcnSwE/S3s2UWEx/DBEB | 178 KB | 36 KB (20%) | ✓ | 3rd |
| https://www.intercontinental.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-initial.min.202604220001.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 InventoryAction245 resources · 10.3 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 245 resources | 10.3 MiB | ||||||
CImage OptimizationAction73 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
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 Loading12 fonts (688 KB)PASS
Web fonts
12
688 KB total
Render-blocking
0
of 12
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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
- 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
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 ~145 KB and ~290 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
AHTTP Cachingmax-age=14400 (4 hours)PASS
max-age=14400
| Directive | Value | Meaning |
|---|---|---|
| max-age | 14400 | Cache for 4 hours |
Network Waterfall245 requests over 9770msINFO
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 | 10869ms | 486 KB | 41% | $144/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 1614ms | 25 KB | — | $21/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 1397ms | 247 KB | 16% | $19/mo | Costly |
Unattributable Unattributable | Other | 1365ms | 0 KB | — | $18/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 776ms | 44 KB | — | $10/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 642ms | 2 KB | 20% | $9/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 641ms | 349 KB | 78% | $9/mo | Costly |
www.ihg.com www.ihg.com | Other | 633ms | 23 KB | — | $8/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 552ms | 37 KB | — | $7/mo | Costly |
www.ihg.com www.ihg.com | Other | 267ms | 125 KB | 65% | $4/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 192ms | 260 KB | — | $3/mo | Optional |
identity.intercontinental.com identity.intercontinental.com | Other | 173ms | 238 KB | 62% | $2/mo | Optional |
www.intercontinental.com www.intercontinental.com | Other | 167ms | 47 KB | 58% | $2/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 131ms | 3 KB | — | $2/mo | Optional |
unpkg unpkg.com | CDN | 119ms | 98 KB | 74% | $2/mo | Optional |
messenger-ui.usw.ivastudio.ai messenger-ui.usw.ivastudio.ai | Other | 113ms | 332 KB | 51% | $2/mo | Optional |
siteintercept.qualtrics.com siteintercept.qualtrics.com | Other | 92ms | 36 KB | 60% | $1/mo | Optional |
assets.pxlecdn.com assets.pxlecdn.com | Other | 92ms | 16 KB | — | $1/mo | Optional |
consent.trustarc.com consent.trustarc.com | Other | 77ms | 36 KB | 71% | $1/mo | Optional |
identity.intercontinental.com identity.intercontinental.com | Other | 70ms | 0 KB | — | $1/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 69ms | 1 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.ihg.com adds 10869ms and costs ~$144/month
- www.intercontinental.com adds 1614ms and costs ~$21/month
- assets.adobedtm.com adds 1397ms and costs ~$19/month
- Unattributable adds 1365ms and costs ~$18/month
- www.intercontinental.com adds 776ms and costs ~$10/month
- www.intercontinental.com adds 642ms and costs ~$9/month
- www.intercontinental.com adds 641ms and costs ~$9/month
- www.ihg.com adds 633ms and costs ~$8/month
- www.intercontinental.com adds 552ms and costs ~$7/month
- www.ihg.com adds 267ms and costs ~$4/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 10869ms 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.intercontinental.com takes 1614ms 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 1397ms 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 1365ms 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.intercontinental.com takes 776ms 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.intercontinental.com takes 642ms 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.intercontinental.com takes 641ms 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
78% of www.intercontinental.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
www.ihg.com takes 633ms 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.intercontinental.com takes 552ms 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 267ms 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
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
62% of identity.intercontinental.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
58% of www.intercontinental.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
74% of unpkg'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 messenger-ui.usw.ivastudio.ai'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
60% of siteintercept.qualtrics.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
71% of consent.trustarc.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