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.
3.97 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
24.07 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
6.83 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.122
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
13.55 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.
34.94 s
Page Load Progression
FPage Weight BudgetAction15.2 MB transferred, 103 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
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 CostAction21359ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.vanityfair.com/verso/static/2880.865952f35702ddfb7152.js | 6369ms | 4311ms | 191ms | 3rd |
| https://www.vanityfair.com/ | 3434ms | 147ms | 326ms | 3rd |
| https://www.vanityfair.com/verso/static/presenter-bundles.d7384530fdc10d8b1f48.js | 3408ms | 3332ms | 20ms | 3rd |
| Unattributable | 1986ms | 54ms | 0ms | 3rd |
| https://www.vanityfair.com/-9qPnEKLCXraSoceuVIFCQPvsLMAujP8LBD1x96bEQND4gue0Dq5TLjgSn-Xpr9AriYlXJU1hdTmpmo1M1-1HQK63qlAYmjFKTf5GnVMss2uIDARHzqz_cTB72H6OZpHofCX-WVQ | 954ms | 791ms | 75ms | 3rd |
| https://privacy.condenastdigital.com/fides.js?property_id=FDS-0JCE2P | 944ms | 513ms | 303ms | 3rd |
| https://www.vanityfair.com/verso/static/1113.e5d6201548a2ec9583d0.js | 789ms | 363ms | 381ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097963 | 651ms | 313ms | 91ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KSG89LT&l=dataLayer | 623ms | 501ms | 108ms | 3rd |
| https://cdn.gladly.com/assets/chat-sdk/apiBootstrap~2cfce1229b40af21.js | 365ms | 341ms | 21ms | 3rd |
Showing top 10 of 21 scripts
FJS BundlesAction43 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.vanityfair.com/verso/static/1113.e5d6201548a2ec9583d0.js | 481 KB | 236 KB (49%) | ✓ | 3rd |
| https://www.vanityfair.com/verso/static/2880.865952f35702ddfb7152.js | 297 KB | 148 KB (50%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097963 | 187 KB | 145 KB (77%) | ✓ | 3rd |
| https://www.vanityfair.com/verso/static/2519.cb0a9eeca6e93143dffa.js | 304 KB | 133 KB (44%) | ✓ | 3rd |
| https://www.vanityfair.com/verso/static/1292.40f59c87ae47d8b12033.js | 156 KB | 117 KB (75%) | ✓ | 3rd |
| https://cdn.gladly.com/assets/chat-sdk/apiBootstrap~2cfce1229b40af21.js | 148 KB | 82 KB (55%) | ✓ | 3rd |
| https://martech.condenastdigital.com/lib/martech.js | 118 KB | 76 KB (65%) | ✗ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KSG89LT&l=dataLayer | 189 KB | 74 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PVBXQMCR>m=4e64h1 | 120 KB | 61 KB (51%) | ✓ | 3rd |
| https://ads-static.conde.digital/production/cns/builds/vanity-fair/v6.js?v=12571 | 41 KB | 32 KB (78%) | ✓ | 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 InventoryAction103 resources · 15.2 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 103 resources | 15.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization23 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.
Performance issues directly impact user engagement and conversion rates.
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 Loading11 fonts (383 KB)PASS
Web fonts
11
383 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
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)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints2 hints, 0 missing preconnectsPASS
Current Resource Hints
2 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall103 requests over 7365msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.vanityfair.com www.vanityfair.com | Other | 6369ms | 297 KB | 50% | $110/mo | Costly |
www.vanityfair.com www.vanityfair.com | Other | 3434ms | 172 KB | — | $59/mo | Costly |
www.vanityfair.com www.vanityfair.com | Other | 3408ms | 34 KB | — | $59/mo | Costly |
Unattributable Unattributable | Other | 1986ms | 0 KB | — | $34/mo | Costly |
www.vanityfair.com www.vanityfair.com | Other | 954ms | 62 KB | — | $16/mo | Costly |
privacy.condenastdigital.com privacy.condenastdigital.com | Other | 944ms | 199 KB | — | $16/mo | Costly |
www.vanityfair.com www.vanityfair.com | Other | 789ms | 481 KB | 49% | $14/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 651ms | 187 KB | 77% | $11/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 623ms | 189 KB | 39% | $11/mo | Costly |
cdn.gladly.com cdn.gladly.com | Other | 365ms | 148 KB | 55% | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 332ms | 120 KB | 51% | $6/mo | Costly |
www.vanityfair.com www.vanityfair.com | Other | 293ms | 304 KB | 44% | $5/mo | Costly |
www.vanityfair.com www.vanityfair.com | Other | 240ms | 16 KB | — | $4/mo | Costly |
globalservices.conde.digital globalservices.conde.digital | Other | 235ms | 26 KB | — | $4/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 200ms | 34 KB | — | $3/mo | Optional |
apis.google.com apis.google.com | Other | 159ms | 24 KB | — | $3/mo | Optional |
www.vanityfair.com www.vanityfair.com | Other | 110ms | 156 KB | 75% | $2/mo | Optional |
www.vanityfair.com www.vanityfair.com | Other | 99ms | 8 KB | — | $2/mo | Optional |
ads-static.conde.digital ads-static.conde.digital | Other | 60ms | 41 KB | 78% | $1/mo | Optional |
cdn.gladly.com cdn.gladly.com | Other | 59ms | 0 KB | — | $1/mo | Optional |
martech.condenastdigital.com martech.condenastdigital.com | Other | 51ms | 118 KB | 65% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.vanityfair.com adds 6369ms and costs ~$110/month
- www.vanityfair.com adds 3434ms and costs ~$59/month
- www.vanityfair.com adds 3408ms and costs ~$59/month
- Unattributable adds 1986ms and costs ~$34/month
- www.vanityfair.com adds 954ms and costs ~$16/month
- privacy.condenastdigital.com adds 944ms and costs ~$16/month
- www.vanityfair.com adds 789ms and costs ~$14/month
- securepubads.g.doubleclick.net adds 651ms and costs ~$11/month
- Google Tag Manager adds 623ms and costs ~$11/month
- cdn.gladly.com adds 365ms and costs ~$6/month
- Google Tag Manager adds 332ms and costs ~$6/month
- www.vanityfair.com adds 293ms and costs ~$5/month
- www.vanityfair.com adds 240ms and costs ~$4/month
- globalservices.conde.digital adds 235ms 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.vanityfair.com takes 6369ms 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.vanityfair.com takes 3434ms 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.vanityfair.com takes 3408ms 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 1986ms 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.vanityfair.com takes 954ms 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
privacy.condenastdigital.com takes 944ms 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.vanityfair.com takes 789ms 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
securepubads.g.doubleclick.net takes 651ms 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
77% of securepubads.g.doubleclick.net'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
Google Tag Manager takes 623ms 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
cdn.gladly.com takes 365ms 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
55% of cdn.gladly.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
Google Tag Manager takes 332ms 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
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
www.vanityfair.com takes 293ms 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.vanityfair.com takes 240ms 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
globalservices.conde.digital takes 235ms 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
75% of www.vanityfair.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
78% of ads-static.conde.digital'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 martech.condenastdigital.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