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.
2.82 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
39.03 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.41 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
1.804
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
12.58 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.
40.33 s
Page Load Progression
825 ms
1.7 s
2.5 s 3.3 s
4.1 s
5.0 s
5.8 s
6.6 sFPage Weight BudgetAction10.0 MB transferred, 143 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
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 CostAction6620ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.paramount.com/ | 1341ms | 10ms | 2ms | 3rd |
| https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 1016ms | 799ms | 208ms | 3rd |
| Unattributable | 959ms | 72ms | 0ms | 3rd |
| https://www.paramount.com/core/assets/vendor/jquery/jquery.min.js?v=4.0.0-rc.1 | 798ms | 285ms | 19ms | 3rd |
| https://cdn.privacy.paramount.com/dist/optanon-v2.0.0.js | 490ms | 416ms | 6ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KED8TKXMRG&cx=c>m=4e64k0 | 297ms | 220ms | 72ms | 3rd |
| https://tags.tiqcdn.com/utag/cbsi/paramountplusmicrosites/prod/utag.js | 261ms | 222ms | 14ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 246ms | 130ms | 116ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N3LHJHVT | 240ms | 180ms | 57ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-6220336&cx=c>m=4e64k0 | 193ms | 142ms | 48ms | 3rd |
Showing top 10 of 17 scripts
FJS BundlesAction62 scripts, 677 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 242 KB (67%) | ✓ | 3rd |
| https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 259 KB | 155 KB (60%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KED8TKXMRG&cx=c>m=4e64k0 | 158 KB | 64 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N3LHJHVT | 152 KB | 62 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-6220336&cx=c>m=4e64k0 | 129 KB | 61 KB (47%) | ✓ | 3rd |
| https://www.paramount.com/themes/custom/paramount/js/jquery-ui.min.js?tdwsyn | 67 KB | 59 KB (89%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 34 KB (35%) | ✓ | 3rd |
| https://www.paramount.com/core/misc/message.js?v=11.2.8 | 3 KB | — | ✓ | 3rd |
| https://www.paramount.com/modules/custom/onetrust/js/onetrust.js?tdwsyn | 1 KB | — | ✓ | 3rd |
| https://www.paramount.com/modules/contrib/google_tag/js/gtm.js?tdwsyn | 1 KB | — | ✓ | 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 InventoryAction143 resources · 10.0 MB · 677 KB savings availableFIX
~676.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 143 resources | 10.0 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store, max-age=0
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
CImage OptimizationAction44 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
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 Loading4 fonts (82 KB)PASS
Web fonts
4
82 KB total
Render-blocking
0
of 4
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 HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall143 requests over 4233msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.paramount.com www.paramount.com | Other | 1341ms | 48 KB | — | €15/mo | Costly |
cdn.ketchjs.com cdn.ketchjs.com | Other | 1016ms | 259 KB | 60% | €11/mo | Costly |
Unattributable Unattributable | Other | 959ms | 0 KB | — | €10/mo | Costly |
www.paramount.com www.paramount.com | Other | 798ms | 27 KB | — | €9/mo | Costly |
cdn.privacy.paramount.com cdn.privacy.paramount.com | Other | 490ms | 9 KB | — | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 297ms | 158 KB | 40% | €3/mo | Costly |
tags.tiqcdn.com tags.tiqcdn.com | Other | 261ms | 33 KB | — | €3/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 246ms | 362 KB | 67% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 240ms | 152 KB | 41% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 193ms | 129 KB | 47% | €2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 170ms | 97 KB | 35% | €2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 157ms | 45 KB | — | €2/mo | Optional |
www.paramount.com www.paramount.com | Other | 142ms | 9 KB | — | €2/mo | Optional |
www.paramount.com www.paramount.com | Other | 98ms | 67 KB | 89% | €1/mo | Optional |
LinkedIn Insight snap.licdn.com | Advertising | 83ms | 19 KB | — | €1/mo | Optional |
Twitter/X Pixel static.ads-twitter.com | Advertising | 72ms | 13 KB | — | €1/mo | Optional |
www.paramount.com www.paramount.com | Other | 57ms | 23 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.paramount.com adds 1341ms and costs ~€15/month
- cdn.ketchjs.com adds 1016ms and costs ~€11/month
- Unattributable adds 959ms and costs ~€10/month
- www.paramount.com adds 798ms and costs ~€9/month
- cdn.privacy.paramount.com adds 490ms and costs ~€5/month
- Google Tag Manager adds 297ms and costs ~€3/month
- tags.tiqcdn.com adds 261ms and costs ~€3/month
- www.gstatic.com adds 246ms and costs ~€3/month
- Google Tag Manager adds 240ms 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.paramount.com takes 1341ms 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.ketchjs.com takes 1016ms 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
60% of cdn.ketchjs.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
Unattributable takes 959ms 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.paramount.com takes 798ms 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.privacy.paramount.com takes 490ms 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
Google Tag Manager takes 297ms 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
tags.tiqcdn.com takes 261ms 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.gstatic.com takes 246ms 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
67% of www.gstatic.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 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
89% of www.paramount.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