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.
5.11 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
16.99 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
693 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.005
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.35 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.
17.86 s
Page Load Progression
375 ms
750 ms 1.1 s
1.5 s
1.9 s 2.2 s 2.6 s 3.0 sFPage Weight BudgetAction3.0 MB transferred, 147 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 ImpactAction62% third-party, 0 ms blockingFIX
FJS Execution CostAction6842ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://podcasts.apple.com/us/new | 2748ms | 222ms | 1ms | 1st |
| https://podcasts.apple.com/assets/index~6927d34b58.js | 2037ms | 1266ms | 8ms | 1st |
| Unattributable | 1108ms | 84ms | 0ms | 3rd |
| https://podcasts.apple.com/includes/js-cdn/musickit/v3/amp/musickit.js | 577ms | 171ms | 74ms | 1st |
| https://podcasts.apple.com/includes/js-cdn/musickit/v3/components/musickit-components/p-70a2b3a8.js | 171ms | 164ms | 0ms | 1st |
| https://podcasts.apple.com/assets/mt-client-logger-core.esm~d395a518d6.js | 120ms | 114ms | 0ms | 1st |
| https://podcasts.apple.com/assets/index~22e4d0d933.js | 81ms | 44ms | 1ms | 1st |
FJS BundlesAction32 scripts, 508 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://podcasts.apple.com/assets/index~6927d34b58.js | 496 KB | 335 KB (68%) | ✓ | 1st |
| https://podcasts.apple.com/includes/js-cdn/musickit/v3/amp/musickit.js | 168 KB | 123 KB (73%) | ✓ | 1st |
| https://podcasts.apple.com/assets/index~22e4d0d933.js | 71 KB | 50 KB (71%) | ✓ | 1st |
| https://podcasts.apple.com/assets/mt-metricskit-delegates-html.esm~2754e74b3f.js | 1 KB | — | ✓ | 1st |
| https://podcasts.apple.com/includes/js-cdn/musickit/v3/components/musickit-components/p-712b2839.js | 14 KB | — | ✓ | 1st |
| https://podcasts.apple.com/includes/js-cdn/musickit/v3/components/musickit-components/p-e6049ba5.js | 0 KB | — | ✓ | 1st |
| https://podcasts.apple.com/assets/index~d37a8a3487.js | 5 KB | — | ✓ | 1st |
| https://podcasts.apple.com/assets/version~4e0a6d5aa6.js | 10 KB | — | ✓ | 1st |
| https://podcasts.apple.com/assets/mt-metricskit-processor-clickstream.esm~d3a4b7ad40.js | 13 KB | — | ✓ | 1st |
| https://podcasts.apple.com/assets/mt-metricskit-utils-private.esm~1e33bda3c6.js | 5 KB | — | ✓ | 1st |
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 InventoryAction147 resources · 3.0 MB · 508 KB savings availableFIX
~508.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 147 resources | 3.0 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
AImage Optimization92 images, 0 KB saveablePASS
A+Font Loading5 fonts (435 KB)PASS
Web fonts
5
435 KB total
Render-blocking
0
of 5
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
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 ~206 KB and ~412 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints1 hints, 0 missing preconnectsPASS
Current Resource Hints
1 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AHTTP Cachingmax-age=60 (1 minute)PASS
max-age=60
| Directive | Value | Meaning |
|---|---|---|
| max-age | 60 | Cache for 1 minute |
Network Waterfall147 requests over 2272msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1108ms | 0 KB | — | $6/mo | Costly |
These scripts may cost more than they're worth
- Unattributable adds 1108ms and costs ~$6/month
Unattributable takes 1108ms 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