Performance
· 22 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.
1.63 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.28 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 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.
1.63 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.
2.29 s
Page Load Progression
DPage Weight BudgetAction2.3 MB transferred, 100 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction100 resources · 2.3 MB · 226 KB savings availableFIX
~225.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 100 resources | 2.3 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
CImage OptimizationAction58 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
BJS Execution Cost855ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.apple.com/ | 219ms | 2ms | 0ms | 3rd |
| https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js | 202ms | 73ms | 5ms | 3rd |
| Unattributable | 198ms | 12ms | 0ms | 3rd |
| https://www.apple.com/v/home/a/scripts/main.built.js | 185ms | 73ms | 0ms | 3rd |
| https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.js | 50ms | 50ms | 0ms | 3rd |
CJS BundlesAction17 scripts, 226 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 | 57 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
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 (814 KB)PASS
Web fonts
5
814 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 ~407 KB and ~814 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
Network Waterfall100 requests over 1419msINFO
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 | 219ms | 43 KB | — | $1/mo | Costly |
www.apple.com www.apple.com | Other | 202ms | 161 KB | 35% | $1/mo | Costly |
Unattributable Unattributable | Other | 198ms | 0 KB | — | $1/mo | Optional |
www.apple.com www.apple.com | Other | 185ms | 26 KB | — | $1/mo | Optional |
www.apple.com www.apple.com | Other | 50ms | 1 KB | — | $0/mo | Optional |
These scripts may cost more than they're worth
- www.apple.com adds 219ms and costs ~$1/month
- www.apple.com adds 202ms 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 219ms 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 202ms 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
Image Optimization103 images, 232 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
103
Total Size
232 KB