Performance
· 26 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.
9.12 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.36 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
56 ms
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.
9.12 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.
12.38 s
Page Load Progression
DPage Weight BudgetAction2.4 MB transferred, 102 requestsFIX
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
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 CostAction4052ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.apple.com/ | 1056ms | 10ms | 2ms | 3rd |
| https://www.apple.com/v/home/a/scripts/main.built.js | 877ms | 308ms | 1ms | 3rd |
| Unattributable | 814ms | 60ms | 0ms | 3rd |
| https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js | 562ms | 289ms | 20ms | 3rd |
| https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.js | 216ms | 201ms | 0ms | 3rd |
| https://www.apple.com/metrics/ac-target/latest/ac-target.js | 175ms | 151ms | 17ms | 3rd |
| https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/ac-analytics.js | 141ms | 74ms | 63ms | 3rd |
| https://www.apple.com/v/home/a/scripts/mothers-day2026.built.js | 125ms | 87ms | 0ms | 3rd |
| https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.js | 85ms | 59ms | 23ms | 3rd |
DPage Weight InventoryAction102 resources · 2.4 MB · 225 KB savings availableFIX
~225.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 102 resources | 2.4 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
CImage OptimizationAction60 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
CJS BundlesAction17 scripts, 225 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.apple.com/v/home/a/scripts/lottie-player.built.js | 76 KB | 66 KB (87%) | ✓ | 3rd |
| https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js | 161 KB | 56 KB (35%) | ✓ | 3rd |
| https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/ac-analytics.js | 102 KB | 41 KB (40%) | ✓ | 3rd |
| https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.js | 56 KB | 35 KB (63%) | ✓ | 3rd |
| https://www.apple.com/v/home/a/built/scripts/endless-entertainment-gallery.built.js | 41 KB | 27 KB (68%) | ✓ | 3rd |
| https://www.apple.com/v/home/a/scripts/inline-media.built.js | 2 KB | — | ✓ | 3rd |
| https://www.apple.com/v/home/a/scripts/home-analytics.built.js | 2 KB | — | ✓ | 3rd |
| https://www.apple.com/v/home/a/scripts/main.built.js | 26 KB | — | ✓ | 3rd |
| https://www.apple.com/metrics/ac-target/latest/ac-target.js | 38 KB | — | ✓ | 3rd |
| https://www.apple.com/ac/globalfooter/8/en_US/scripts/ac-globalfooter.built.js | 4 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CCompression AlgorithmActionMain response served uncompressedREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
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 Loading5 fonts (916 KB)PASS
Web fonts
5
916 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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~458 KB and ~916 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
Network Waterfall102 requests over 1300msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.apple.com www.apple.com | Other | 1056ms | 43 KB | — | $6/mo | Costly |
www.apple.com www.apple.com | Other | 877ms | 26 KB | — | $5/mo | Costly |
Unattributable Unattributable | Other | 814ms | 0 KB | — | $5/mo | Costly |
www.apple.com www.apple.com | Other | 562ms | 161 KB | 35% | $3/mo | Costly |
www.apple.com www.apple.com | Other | 216ms | 1 KB | — | $1/mo | Costly |
www.apple.com www.apple.com | Other | 175ms | 38 KB | — | $1/mo | Optional |
www.apple.com www.apple.com | Other | 141ms | 102 KB | 40% | $1/mo | Optional |
www.apple.com www.apple.com | Other | 125ms | 2 KB | — | $1/mo | Optional |
www.apple.com www.apple.com | Other | 85ms | 56 KB | 63% | $0/mo | Optional |
These scripts may cost more than they're worth
- www.apple.com adds 1056ms and costs ~$6/month
- www.apple.com adds 877ms and costs ~$5/month
- Unattributable adds 814ms and costs ~$5/month
- www.apple.com adds 562ms and costs ~$3/month
- www.apple.com adds 216ms and costs ~$1/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.apple.com takes 1056ms 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.apple.com takes 877ms 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 814ms 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.apple.com takes 562ms 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.apple.com takes 216ms 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
63% of www.apple.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
Image Optimization103 images, 232 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
103
Total Size
232 KB