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.
1.44 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.16 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
432 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.565
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.47 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.
7.13 s
Page Load Progression
FPage Weight BudgetAction11.1 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
DJS Execution CostAction2872ms 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 | 909ms | 685ms | 46ms | 3rd |
| https://www.intercontinental.com/hotels/us/es/reservation | 400ms | 13ms | 2ms | 3rd |
| Unattributable | 387ms | 19ms | 0ms | 3rd |
| https://assets.adobedtm.com/da3424fdbc19/cba4236ebe4a/launch-dccf471f969b.min.js | 343ms | 245ms | 56ms | 3rd |
| https://www.intercontinental.com/cdn/vendor/appdynamics/adrum/adrum.js | 289ms | 222ms | 2ms | 3rd |
| https://www.intercontinental.com/uPkV/Clq1/k/t/rECJ5JiA/1upiGVat7JiXmJ9V9Q/TkcnSwE/S3s2UWEx/DBEB | 150ms | 138ms | 9ms | 3rd |
| https://www.intercontinental.com/etc.clientlibs/clientlibs/granite/jquery.min.202604220001.js | 130ms | 109ms | 8ms | 3rd |
| https://www.intercontinental.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-intercontinental.min.202604220001.js | 126ms | 88ms | 24ms | 3rd |
| https://identity.intercontinental.com/w2dTl0lyf6EHw/TqUpK/vfmte7BbY/hubYbSufuD1uchXi/VwgDKA/XgdhdCt7/Lm4B | 84ms | 70ms | 12ms | 3rd |
| https://www.intercontinental.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-initial.min.202604220001.js | 55ms | 20ms | 3ms | 3rd |
FJS BundlesAction100 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 | 196 KB (40%) | ✓ | 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://identity.intercontinental.com/w2dTl0lyf6EHw/TqUpK/vfmte7BbY/hubYbSufuD1uchXi/VwgDKA/XgdhdCt7/Lm4B | 176 KB | 69 KB (40%) | ✓ | 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 | 177 KB | 36 KB (20%) | ✓ | 3rd |
| https://www.intercontinental.com/etc.clientlibs/ihg-kernel/clientlibs/clientlib-initial.min.202604220001.js | 46 KB | 26 KB (58%) | ✓ | 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 · 11.1 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 245 resources | 11.1 MiB | ||||||
CImage OptimizationAction71 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
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 (688 KB)PASS
Web fonts
11
688 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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
- 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
AHTTP Cachingmax-age=14400 (4 hours)PASS
max-age=14400
| Directive | Value | Meaning |
|---|---|---|
| max-age | 14400 | Cache for 4 hours |
Network Waterfall245 requests over 6910msINFO
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 | 909ms | 486 KB | 40% | $12/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 400ms | 25 KB | — | $5/mo | Costly |
Unattributable Unattributable | Other | 387ms | 0 KB | — | $5/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 343ms | 247 KB | 16% | $5/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 289ms | 44 KB | — | $4/mo | Costly |
www.intercontinental.com www.intercontinental.com | Other | 150ms | 2 KB | 20% | $2/mo | Optional |
www.intercontinental.com www.intercontinental.com | Other | 130ms | 37 KB | — | $2/mo | Optional |
www.intercontinental.com www.intercontinental.com | Other | 126ms | 349 KB | 78% | $2/mo | Optional |
identity.intercontinental.com identity.intercontinental.com | Other | 84ms | 0 KB | 40% | $1/mo | Optional |
www.intercontinental.com www.intercontinental.com | Other | 55ms | 46 KB | 58% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.ihg.com adds 909ms and costs ~$12/month
- www.intercontinental.com adds 400ms and costs ~$5/month
- Unattributable adds 387ms and costs ~$5/month
- assets.adobedtm.com adds 343ms and costs ~$5/month
- www.intercontinental.com adds 289ms 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 909ms 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 400ms 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 387ms 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 343ms 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 289ms 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
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