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.
4.65 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.16 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.65 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.43 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.
12.75 s
Page Load Progression
DPage Weight BudgetAction2.1 MB transferred, 89 requestsFIX
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4647ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://web-cdn.pandora.com/web-client-assets/web-vendor.2d3faa7f06a4f48aae5f.js | 1335ms | 1052ms | 144ms | 3rd |
| https://web-cdn.pandora.com/web-client-assets/web-app.531987748f16c121508d.js | 746ms | 614ms | 130ms | 3rd |
| Unattributable | 611ms | 89ms | 0ms | 3rd |
| https://client.px-cloud.net/PXXljWHHUe/main.min.js | 543ms | 505ms | 28ms | 3rd |
| https://www.pandora.com/ | 359ms | 34ms | 12ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202508.1.0/otBannerSdk.js | 336ms | 199ms | 60ms | 3rd |
| https://web-cdn.pandora.com/web-client-assets/c_onboarding.d033dd55631a54b7efd4.js | 262ms | 184ms | 4ms | 3rd |
| https://web-cdn.pandora.com/web-client-assets/web-commons.76f2342d7994562ecd18.js | 145ms | 44ms | 60ms | 3rd |
| https://web-cdn.pandora.com/web-client-assets/d_payments.61f4dd1bb105f274a280.js | 116ms | 77ms | 38ms | 3rd |
| https://web-cdn.pandora.com/web-client-assets/d_podcast.fc2b615b194cd3b9bcb9.js | 82ms | 68ms | 13ms | 3rd |
Showing top 10 of 12 scripts
FJS BundlesAction36 scripts, 531 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://web-cdn.pandora.com/web-client-assets/web-vendor.2d3faa7f06a4f48aae5f.js | 343 KB | 149 KB (44%) | ✓ | 3rd |
| https://web-cdn.pandora.com/web-client-assets/web-app.531987748f16c121508d.js | 287 KB | 128 KB (45%) | ✓ | 3rd |
| https://web-cdn.pandora.com/web-client-assets/web-commons.76f2342d7994562ecd18.js | 88 KB | 72 KB (83%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202508.1.0/otBannerSdk.js | 120 KB | 63 KB (52%) | ✓ | 3rd |
| https://web-cdn.pandora.com/web-client-assets/d_payments.61f4dd1bb105f274a280.js | 72 KB | 35 KB (50%) | ✓ | 3rd |
| https://client.px-cloud.net/PXXljWHHUe/main.min.js | 0 KB | 32 KB (35%) | ✓ | 3rd |
| https://client.px-cloud.net/PXXljWHHUe/main.min.js | 91 KB | 32 KB (35%) | ✓ | 3rd |
| https://web-cdn.pandora.com/web-client-assets/d_stats.d9a5c318ffd0c086b401.js | 36 KB | 20 KB (57%) | ✓ | 3rd |
| https://web-cdn.pandora.com/web-client-assets/d_listener.a520eabcc40ec7f7ac69.js | 6 KB | — | ✓ | 3rd |
| https://web-cdn.pandora.com/web-client-assets/smart_launch_hooks_android.043255244b06c65e391f.js | 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 InventoryAction89 resources · 2.1 MB · 531 KB savings availableFIX
~531.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 89 resources | 2.1 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization11 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
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 LoadingNo web fonts (system fonts)PASS
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 Waterfall89 requests over 1582msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
web-cdn.pandora.com web-cdn.pandora.com | Other | 1335ms | 343 KB | 44% | $18/mo | Costly |
web-cdn.pandora.com web-cdn.pandora.com | Other | 746ms | 287 KB | 45% | $10/mo | Costly |
Unattributable Unattributable | Other | 611ms | 0 KB | — | $8/mo | Costly |
client.px-cloud.net client.px-cloud.net | Other | 543ms | 0 KB | 35% | $7/mo | Costly |
www.pandora.com www.pandora.com | Other | 359ms | 14 KB | — | $5/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 336ms | 120 KB | 52% | $4/mo | Essential |
web-cdn.pandora.com web-cdn.pandora.com | Other | 262ms | 8 KB | — | $3/mo | Costly |
web-cdn.pandora.com web-cdn.pandora.com | Other | 145ms | 88 KB | 83% | $2/mo | Optional |
web-cdn.pandora.com web-cdn.pandora.com | Other | 116ms | 72 KB | 50% | $2/mo | Optional |
web-cdn.pandora.com web-cdn.pandora.com | Other | 82ms | 25 KB | — | $1/mo | Optional |
web-cdn.pandora.com web-cdn.pandora.com | Other | 57ms | 2 KB | — | $1/mo | Optional |
web-cdn.pandora.com web-cdn.pandora.com | Other | 56ms | 36 KB | 57% | $1/mo | Optional |
These scripts may cost more than they're worth
- web-cdn.pandora.com adds 1335ms and costs ~$18/month
- web-cdn.pandora.com adds 746ms and costs ~$10/month
- Unattributable adds 611ms and costs ~$8/month
- client.px-cloud.net adds 543ms and costs ~$7/month
- www.pandora.com adds 359ms and costs ~$5/month
- web-cdn.pandora.com adds 262ms 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
web-cdn.pandora.com takes 1335ms 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
web-cdn.pandora.com takes 746ms 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 611ms 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
client.px-cloud.net takes 543ms 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.pandora.com takes 359ms 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
52% of OneTrust'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
web-cdn.pandora.com takes 262ms 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
83% of web-cdn.pandora.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
57% of web-cdn.pandora.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