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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
4
REVIEW
4
PASS
7
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
55
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

10.74 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

12.85 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

78 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.

10.74 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.

12.86 s

Page Load Progression

496 ms
992 ms
1.5 s
2.0 s
2.5 s
3.0 s
3.5 s
4.0 s
Checks
17
7 PASS 4 REVIEW 4 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.0 MiB of 2.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3212ms total JS execution
FIX
3212ms total JS execution
Warning::
https://www.apple.com/: 873ms CPU time
Warning::
https://www.apple.com/v/home/a/scripts/main.built....: 849ms CPU time
Warning::
https://www.apple.com/api-www/global-elements/glob...: 572ms CPU time
Warning::
Unattributable: 314ms CPU time
Info::
https://www.apple.com/metrics/ac-analytics/2.29.1/...: 181ms CPU time
Warning::
Third-party scripts: 3212ms (100% of total)

Main Thread Breakdown

Script Evaluation 32% Other 28% Style & Layout 28% Rendering 7%
ScriptTotalScriptingParse/CompileParty
https://www.apple.com/873ms9ms2ms3rd
https://www.apple.com/v/home/a/scripts/main.built.js849ms251ms0ms3rd
https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js572ms267ms12ms3rd
Unattributable314ms11ms0ms3rd
https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.js181ms165ms0ms3rd
https://www.apple.com/metrics/ac-target/latest/ac-target.js166ms149ms10ms3rd
https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.js149ms122ms21ms3rd
https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/ac-analytics.js108ms55ms41ms3rd
D
Page Weight Inventory
Action
49 resources · 2.0 MB · 190 KB savings available
FIX
49 resources · 2.0 MB · 190 KB savings available
Warning::
Page weight 1003 KB over 1MB target
Got: 2.0 MB Expected: ≤ 1 MB
Info::
~190 KB of savings available
Warning::
48 third-party resources (100% of weight)
Info::
4 resources over 200KB
49 resources · 2.0 MiB · 48 third-party 1003.0 KiB over 1MB target
Font 58% · 1.1 MiB
JavaScript 26% · 522.4 KiB
Image 9% · 173.1 KiB
CSS 4% · 78.4 KiB
Other 2% · 46.7 KiB
Document 2% · 40.6 KiB

~190.3 KiB of savings available

Remove unused JavaScript: 190.3 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Page Weight Budget
Action
2.0 MB transferred, 49 requests
REVIEW
2.0 MB transferred, 49 requests
Info::
Page weighs 3.8 MB (2.0 MB transferred)
Info::
Fonts are 1.1 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.1 MB
Warning::
JavaScript is 522 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 522 KB
Info::
49 HTTP requests
Info::
Estimated 0.42 g CO2 per page load
2.0 MB / 2.4 MB budget
2.0 MB transferred
49 requests
0.42 g CO2 per page load
Fonts 1.1 MiB 58%
JavaScript 522.4 KiB 26%
Images 169.5 KiB 8%
CSS 78.4 KiB 4%
Other 42.8 KiB 2%
HTML 40.6 KiB 2%
Other 4.7 KiB 0%
Other 2.8 KiB 0%
0 2.4 MB 4.9 MB
Approaching limit

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

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.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

C
Image Optimization
Action
6 images, 0 KB saveable
REVIEW
6 images, 0 KB saveable
Warning::
https://www.apple.com/v/home/a/images/logos/apple-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.apple.com/v/home/cm/images/heroes/appl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.apple.com/v/home/cm/images/heroes/macb... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.apple.com/v/home/cm/images/heroes/ipho... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
data:image/gif;base64,R0lGODlhAQABAHAAACH5BAEAAAAA... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
6 images 169 KB
0 oversized -0 KB
5 legacy format
5 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Bundles
Action
16 scripts, 190 KB unused
REVIEW
16 scripts, 190 KB unused
Warning::
https://www.apple.com/v/home/a/scripts/lottie-play...: 66 KB unused (87%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.apple.com/api-www/global-elements/glob...: 56 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.apple.com/metrics/ac-analytics/2.29.1/...: 41 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.apple.com/v/home/a/built/scripts/endle...: 27 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 190 KB
190 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.apple.com/v/home/a/scripts/lottie-player.built.js76 KB66 KB (87%)✓3rd
https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js161 KB56 KB (35%)✓3rd
https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/ac-analytics.js102 KB41 KB (40%)✓3rd
https://www.apple.com/v/home/a/built/scripts/endless-entertainment-gallery.built.js41 KB27 KB (68%)✓3rd
https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.js1 KB—✓3rd
https://www.apple.com/ac/globalfooter/8/en_US/scripts/ac-globalfooter.built.js4 KB—✓3rd
https://www.apple.com/v/home/a/scripts/main.built.js26 KB—✓3rd
https://www.apple.com/v/home/a/scripts/home-analytics.built.js2 KB—✓3rd
https://www.apple.com/metrics/ac-target/latest/ac-target.js38 KB—✓3rd
https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.js56 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
8 fonts (1166 KB)
PASS
8 fonts (1166 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

1166 KB total

Render-blocking

0

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 10.7 s LCP 12.9 shttps://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_semibold.woff2sf-pro-text_semibold.woff2 https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_semibold.woff2 — 229.6 KiB — 9 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_semibold.woff2sf-pro-display_semibold... https://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_semibold.woff2 — 127.2 KiB — 11 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular.woff2sf-pro-text_regular.woff2 https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular.woff2 — 216.2 KiB — 16 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Icons/v3/sf-pro-icons_regular.woff2sf-pro-icons_regular.woff2 https://www.apple.com/wss/fonts/SF-Pro-Icons/v3/sf-pro-icons_regular.woff2 — 14.5 KiB — 5 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_regular.woff2sf-pro-display_regular.... https://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_regular.woff2 — 115.1 KiB — 17 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_bold.woff2sf-pro-text_bold.woff2 https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_bold.woff2 — 228.0 KiB — 19 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Icons/v3/sf-pro-icons_light.woff2sf-pro-icons_light.woff2 https://www.apple.com/wss/fonts/SF-Pro-Icons/v3/sf-pro-icons_light.woff2 — 14.6 KiB — 7 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_light.woff2sf-pro-text_light.woff2 https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_light.woff2 — 220.7 KiB — 9 ms — font-display: swap
sf-pro-text_semibold.woff2 woff2 swap
Size 230 KB
Load time 9 ms
Start 554 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
sf-pro-display_semibold... woff2 swap
Size 127 KB
Load time 11 ms
Start 555 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
sf-pro-text_regular.woff2 woff2 swap
Size 216 KB
Load time 16 ms
Start 555 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
sf-pro-icons_regular.woff2 woff2 swap
Size 15 KB
Load time 5 ms
Start 715 ms
Risk FOUT — text flashes from fallback to web font
sf-pro-display_regular.... woff2 swap
Size 115 KB
Load time 17 ms
Start 716 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
sf-pro-text_bold.woff2 woff2 swap
Size 228 KB
Load time 19 ms
Start 716 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
sf-pro-icons_light.woff2 woff2 swap
Size 15 KB
Load time 7 ms
Start 829 ms
Risk FOUT — text flashes from fallback to web font
sf-pro-text_light.woff2 woff2 swap
Size 221 KB
Load time 9 ms
Start 829 ms
Risk FOUT — text flashes from fallback to web font
  • 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 ~568 KB and ~1136 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
49 requests over 2091ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 10.7 s LCP 12.9 shttps://mzstatic.com// https://mzstatic.com/ — 301 — 172 B — 325 ms — http/1.1https://www.apple.com/www.apple.com/ https://www.apple.com/ — 200 — 40.6 KiB — 71 ms — h2https://www.apple.com/metrics/ac-target/latest/ac-target.jswww.apple.com/metrics/ac-target/lat... https://www.apple.com/metrics/ac-target/latest/ac-target.js — 200 — 37.8 KiB — 50 ms — h2https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.csswww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.css — 200 — 15.5 KiB — 48 ms — h2https://www.apple.com/ac/globalfooter/8/en_US/styles/ac-globalfooter.built.csswww.apple.com/ac/globalfooter/8/en_... https://www.apple.com/ac/globalfooter/8/en_US/styles/ac-globalfooter.built.css — 200 — 7.1 KiB — 31 ms — h2https://www.apple.com/ac/localnav/9/styles/ac-localnav.built.csswww.apple.com/ac/localnav/9/styles/... https://www.apple.com/ac/localnav/9/styles/ac-localnav.built.css — 200 — 8.2 KiB — 42 ms — h2https://www.apple.com/wss/fonts?families=SF+Pro,v3|SF+Pro+Icons,v3www.apple.com/wss/fonts?families=SF... https://www.apple.com/wss/fonts?families=SF+Pro,v3|SF+Pro+Icons,v3 — 200 — 1.9 KiB — 33 ms — h2https://www.apple.com/v/home/a/styles/main.built.csswww.apple.com/v/home/a/styles/main.... https://www.apple.com/v/home/a/styles/main.built.css — 200 — 13.5 KiB — 14 ms — h2https://www.apple.com/v/home/a/styles/home.built.csswww.apple.com/v/home/a/styles/home.... https://www.apple.com/v/home/a/styles/home.built.css — 200 — 4.4 KiB — 11 ms — h2https://www.apple.com/v/home/a/built/styles/home-gallery.built.csswww.apple.com/v/home/a/built/styles... https://www.apple.com/v/home/a/built/styles/home-gallery.built.css — 200 — 19.7 KiB — 23 ms — h2https://www.apple.com/home/built/styles/home_1xz93odk.built.csswww.apple.com/home/built/styles/hom... https://www.apple.com/home/built/styles/home_1xz93odk.built.css — 200 — 2.6 KiB — 36 ms — h2https://www.apple.com/v/home/a/scripts/head.built.jswww.apple.com/v/home/a/scripts/head... https://www.apple.com/v/home/a/scripts/head.built.js — 200 — 3.5 KiB — 15 ms — h2https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.jswww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js — 200 — 161.1 KiB — 50 ms — h2https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/ac-analytics.jswww.apple.com/metrics/ac-analytics/... https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/ac-analytics.js — 200 — 102.1 KiB — 51 ms — h2https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.jswww.apple.com/metrics/ac-analytics/... https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.js — 200 — 849 B — 17 ms — h2https://www.apple.com/v/home/cm/images/heroes/iphone-family/hero_iphone_family__fuz5j2v5xx6y_small_2x.jpgwww.apple.com/v/home/cm/images/hero... https://www.apple.com/v/home/cm/images/heroes/iphone-family/hero_iphone_family__fuz5j2v5xx6y_small_2x.jpg — 200 — 51.3 KiB — 26 ms — h2https://www.apple.com/ac/globalfooter/8/en_US/scripts/ac-globalfooter.built.jswww.apple.com/ac/globalfooter/8/en_... https://www.apple.com/ac/globalfooter/8/en_US/scripts/ac-globalfooter.built.js — 200 — 3.8 KiB — 32 ms — h2https://www.apple.com/v/home/a/scripts/main.built.jswww.apple.com/v/home/a/scripts/main... https://www.apple.com/v/home/a/scripts/main.built.js — 200 — 25.5 KiB — 21 ms — h2https://www.apple.com/v/home/a/scripts/home-analytics.built.jswww.apple.com/v/home/a/scripts/home... https://www.apple.com/v/home/a/scripts/home-analytics.built.js — 200 — 1.6 KiB — 19 ms — h2https://www.apple.com/v/home/a/built/scripts/endless-entertainment-gallery.built.jswww.apple.com/v/home/a/built/script... https://www.apple.com/v/home/a/built/scripts/endless-entertainment-gallery.built.js — 200 — 41.2 KiB — 38 ms — h2https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.jswww.apple.com/ac/localeswitcher/4/e... https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.js — 200 — 55.6 KiB — 27 ms — h2https://www.apple.com/metrics/data-relay/1.2.0/scripts/data-relay.jswww.apple.com/metrics/data-relay/1.... https://www.apple.com/metrics/data-relay/1.2.0/scripts/data-relay.js — 200 — 5.8 KiB — 11 ms — h2https://www.apple.com/metrics/data-relay/1.2.0/scripts/auto-relay.jswww.apple.com/metrics/data-relay/1.... https://www.apple.com/metrics/data-relay/1.2.0/scripts/auto-relay.js — 200 — 936 B — 5 ms — h2https://www.apple.com/shop/experience-metawww.apple.com/shop/experience-meta https://www.apple.com/shop/experience-meta — 200 — 1.5 KiB — 134 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_semibold.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_semibold.woff2 — 200 — 229.6 KiB — 9 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_semibold.woff2www.apple.com/wss/fonts/SF-Pro-Disp... https://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_semibold.woff2 — 200 — 127.2 KiB — 11 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular.woff2 — 200 — 216.2 KiB — 16 ms — h2https://www.apple.com/api-www/global-elements/global-header/v1/flyouts?locale=en_USwww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-header/v1/flyouts?locale=en_US — 200 — 40.5 KiB — 8 ms — h2https://www.apple.com/search-services/suggestions/defaultlinks/?src=globalnav&locale=en_USwww.apple.com/search-services/sugge... https://www.apple.com/search-services/suggestions/defaultlinks/?src=globalnav&locale=en_US — 200 — 781 B — 5 ms — h2https://www.apple.com/us/shop/bag/status?apikey=SFX9YPYY9PPXCU9KHwww.apple.com/us/shop/bag/status?ap... https://www.apple.com/us/shop/bag/status?apikey=SFX9YPYY9PPXCU9KH — 200 — 787 B — 5 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 10.7 s LCP 12.9 shttps://mzstatic.com// https://mzstatic.com/ — 301 — 172 B — 325 ms — http/1.1https://www.apple.com/www.apple.com/ https://www.apple.com/ — 200 — 40.6 KiB — 71 ms — h2https://www.apple.com/metrics/ac-target/latest/ac-target.jswww.apple.com/metrics/ac-target/lat... https://www.apple.com/metrics/ac-target/latest/ac-target.js — 200 — 37.8 KiB — 50 ms — h2https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.csswww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.css — 200 — 15.5 KiB — 48 ms — h2https://www.apple.com/ac/globalfooter/8/en_US/styles/ac-globalfooter.built.csswww.apple.com/ac/globalfooter/8/en_... https://www.apple.com/ac/globalfooter/8/en_US/styles/ac-globalfooter.built.css — 200 — 7.1 KiB — 31 ms — h2https://www.apple.com/ac/localnav/9/styles/ac-localnav.built.csswww.apple.com/ac/localnav/9/styles/... https://www.apple.com/ac/localnav/9/styles/ac-localnav.built.css — 200 — 8.2 KiB — 42 ms — h2https://www.apple.com/wss/fonts?families=SF+Pro,v3|SF+Pro+Icons,v3www.apple.com/wss/fonts?families=SF... https://www.apple.com/wss/fonts?families=SF+Pro,v3|SF+Pro+Icons,v3 — 200 — 1.9 KiB — 33 ms — h2https://www.apple.com/v/home/a/styles/main.built.csswww.apple.com/v/home/a/styles/main.... https://www.apple.com/v/home/a/styles/main.built.css — 200 — 13.5 KiB — 14 ms — h2https://www.apple.com/v/home/a/styles/home.built.csswww.apple.com/v/home/a/styles/home.... https://www.apple.com/v/home/a/styles/home.built.css — 200 — 4.4 KiB — 11 ms — h2https://www.apple.com/v/home/a/built/styles/home-gallery.built.csswww.apple.com/v/home/a/built/styles... https://www.apple.com/v/home/a/built/styles/home-gallery.built.css — 200 — 19.7 KiB — 23 ms — h2https://www.apple.com/home/built/styles/home_1xz93odk.built.csswww.apple.com/home/built/styles/hom... https://www.apple.com/home/built/styles/home_1xz93odk.built.css — 200 — 2.6 KiB — 36 ms — h2https://www.apple.com/v/home/a/scripts/head.built.jswww.apple.com/v/home/a/scripts/head... https://www.apple.com/v/home/a/scripts/head.built.js — 200 — 3.5 KiB — 15 ms — h2https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.jswww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js — 200 — 161.1 KiB — 50 ms — h2https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/ac-analytics.jswww.apple.com/metrics/ac-analytics/... https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/ac-analytics.js — 200 — 102.1 KiB — 51 ms — h2https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.jswww.apple.com/metrics/ac-analytics/... https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.js — 200 — 849 B — 17 ms — h2https://www.apple.com/v/home/cm/images/heroes/iphone-family/hero_iphone_family__fuz5j2v5xx6y_small_2x.jpgwww.apple.com/v/home/cm/images/hero... https://www.apple.com/v/home/cm/images/heroes/iphone-family/hero_iphone_family__fuz5j2v5xx6y_small_2x.jpg — 200 — 51.3 KiB — 26 ms — h2https://www.apple.com/ac/globalfooter/8/en_US/scripts/ac-globalfooter.built.jswww.apple.com/ac/globalfooter/8/en_... https://www.apple.com/ac/globalfooter/8/en_US/scripts/ac-globalfooter.built.js — 200 — 3.8 KiB — 32 ms — h2https://www.apple.com/v/home/a/scripts/main.built.jswww.apple.com/v/home/a/scripts/main... https://www.apple.com/v/home/a/scripts/main.built.js — 200 — 25.5 KiB — 21 ms — h2https://www.apple.com/v/home/a/scripts/home-analytics.built.jswww.apple.com/v/home/a/scripts/home... https://www.apple.com/v/home/a/scripts/home-analytics.built.js — 200 — 1.6 KiB — 19 ms — h2https://www.apple.com/v/home/a/built/scripts/endless-entertainment-gallery.built.jswww.apple.com/v/home/a/built/script... https://www.apple.com/v/home/a/built/scripts/endless-entertainment-gallery.built.js — 200 — 41.2 KiB — 38 ms — h2https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.jswww.apple.com/ac/localeswitcher/4/e... https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.js — 200 — 55.6 KiB — 27 ms — h2https://www.apple.com/metrics/data-relay/1.2.0/scripts/data-relay.jswww.apple.com/metrics/data-relay/1.... https://www.apple.com/metrics/data-relay/1.2.0/scripts/data-relay.js — 200 — 5.8 KiB — 11 ms — h2https://www.apple.com/metrics/data-relay/1.2.0/scripts/auto-relay.jswww.apple.com/metrics/data-relay/1.... https://www.apple.com/metrics/data-relay/1.2.0/scripts/auto-relay.js — 200 — 936 B — 5 ms — h2https://www.apple.com/shop/experience-metawww.apple.com/shop/experience-meta https://www.apple.com/shop/experience-meta — 200 — 1.5 KiB — 134 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_semibold.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_semibold.woff2 — 200 — 229.6 KiB — 9 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_semibold.woff2www.apple.com/wss/fonts/SF-Pro-Disp... https://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_semibold.woff2 — 200 — 127.2 KiB — 11 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular.woff2 — 200 — 216.2 KiB — 16 ms — h2https://www.apple.com/api-www/global-elements/global-header/v1/flyouts?locale=en_USwww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-header/v1/flyouts?locale=en_US — 200 — 40.5 KiB — 8 ms — 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h2https://www.apple.com/wss/fonts/SF-Pro-Icons/v3/sf-pro-icons_regular.woff2www.apple.com/wss/fonts/SF-Pro-Icon... https://www.apple.com/wss/fonts/SF-Pro-Icons/v3/sf-pro-icons_regular.woff2 — 200 — 14.5 KiB — 5 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_regular.woff2www.apple.com/wss/fonts/SF-Pro-Disp... https://www.apple.com/wss/fonts/SF-Pro-Display/v3/sf-pro-display_regular.woff2 — 200 — 115.1 KiB — 17 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_bold.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_bold.woff2 — 200 — 228.0 KiB — 19 ms — h2https://www.apple.com/ac/localeswitcher/4/es_ES/styles/localeswitcher.built.csswww.apple.com/ac/localeswitcher/4/e... https://www.apple.com/ac/localeswitcher/4/es_ES/styles/localeswitcher.built.css — 200 — 5.3 KiB — 15 ms — h2https://www.apple.com/v/home/a/scripts/BaseComponent-CKHRk_Ov.built.jswww.apple.com/v/home/a/scripts/Base... https://www.apple.com/v/home/a/scripts/BaseComponent-CKHRk_Ov.built.js — 200 — 2.2 KiB — 7 ms — h2https://www.apple.com/v/home/a/scripts/lottie-player.built.jswww.apple.com/v/home/a/scripts/lott... https://www.apple.com/v/home/a/scripts/lottie-player.built.js — 200 — 76.4 KiB — 16 ms — h2https://www.apple.com/v/home/a/scripts/inline-media.built.jswww.apple.com/v/home/a/scripts/inli... https://www.apple.com/v/home/a/scripts/inline-media.built.js — 200 — 2.4 KiB — 10 ms — h2https://www.apple.com/v/home/a/scripts/apple50.built.jswww.apple.com/v/home/a/scripts/appl... https://www.apple.com/v/home/a/scripts/apple50.built.js — 200 — 1.7 KiB — 11 ms — h2https://securemvt.apple.com/rest/v1/delivery?client=apple&sessionId=b292ec76e15a40bf837c544f34bc060b&version=2.3.2securemvt.apple.com/rest/v1/deliver... https://securemvt.apple.com/rest/v1/delivery?client=apple&sessionId=b292ec76e15a40bf837c544f34bc060b&version=2.3.2 — 200 — 888 B — 213 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Icons/v3/sf-pro-icons_light.woff2www.apple.com/wss/fonts/SF-Pro-Icon... https://www.apple.com/wss/fonts/SF-Pro-Icons/v3/sf-pro-icons_light.woff2 — 200 — 14.6 KiB — 7 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_light.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_light.woff2 — 200 — 220.7 KiB — 9 ms — h2https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s78078509074182?AQB=1&pccr=true&vidn=34F08CD1C49651D3-600013D5E43CCC43&ndh=1&pf=1&t=16%2F3%2F2026%2017%3A17%3A23%204%200&fid=71ECC7EEFC5A7D94-153693E486E97CCF&ce=UTF-8&cdp=2&cl=1800&pageName=apple%20-%20index%2Ftab%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2F&cc=USD&ch=www.us.homepage&server=ac-2.29.1&h1=www.us.homepage&v3=aos%3A%20us&l3=D%3Das_tex&c4=D%3Dg&v4=D%3DpageName&v14=en-us&c20=aos%3A%20us&v54=D%3Dg&v57=2569-us-watch-hp-hierarchy%3Aa&v97=s.t-p&s=412x823&c=24&j=1.6&v=N&k=Y&bw=412&bh=823&AQE=1securemetrics.apple.com/b/ss/apples... https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s78078509074182?AQB=1&pccr=true&vidn=34F08CD1C49651D3-600013D5E43CCC43&ndh=1&pf=1&t=16%2F3%2F2026%2017%3A17%3A23%204%200&fid=71ECC7EEFC5A7D94-153693E486E97CCF&ce=UTF-8&cdp=2&cl=1800&pageName=apple%20-%20index%2Ftab%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2F&cc=USD&ch=www.us.homepage&server=ac-2.29.1&h1=www.us.homepage&v3=aos%3A%20us&l3=D%3Das_tex&c4=D%3Dg&v4=D%3DpageName&v14=en-us&c20=aos%3A%20us&v54=D%3Dg&v57=2569-us-watch-hp-hierarchy%3Aa&v97=s.t-p&s=412x823&c=24&j=1.6&v=N&k=Y&bw=412&bh=823&AQE=1 — 200 — 583 B — 51 ms — h2https://www.apple.com/favicon.icowww.apple.com/favicon.ico https://www.apple.com/favicon.ico — 200 — 3.6 KiB — 4 ms — h2https://www.apple.com/v/home/a/images/logos/apple-watch-series-11/hero_logo_apple_watch_series_11__d7d7nh53wq2q_small_2x.pngwww.apple.com/v/home/a/images/logos... https://www.apple.com/v/home/a/images/logos/apple-watch-series-11/hero_logo_apple_watch_series_11__d7d7nh53wq2q_small_2x.png — 200 — 6.2 KiB — 6 ms — h2https://www.apple.com/v/home/cm/images/heroes/apple-watch-series-11/hero_apple_watch_series_11__bdz1mml4dx6q_small_2x.jpgwww.apple.com/v/home/cm/images/hero... https://www.apple.com/v/home/cm/images/heroes/apple-watch-series-11/hero_apple_watch_series_11__bdz1mml4dx6q_small_2x.jpg — 200 — 55.0 KiB — 8 ms — h2https://www.apple.com/v/home/cm/images/heroes/macbook-neo/hero_macbook_neo__gnm3snkti4a6_small_2x.jpgwww.apple.com/v/home/cm/images/hero... https://www.apple.com/v/home/cm/images/heroes/macbook-neo/hero_macbook_neo__gnm3snkti4a6_small_2x.jpg — 200 — 56.4 KiB — 10 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 3212ms · 424KB · $18/mo
www.apple.com
Other
Costly
Execution 873ms
Transfer 41 KB
Monthly Cost $5/mo
www.apple.com
Other
Costly
Execution 849ms
Transfer 26 KB
Monthly Cost $5/mo
www.apple.com
Other
Costly
Execution 572ms
Transfer 161 KB
Unused 35%
Monthly Cost $3/mo
Unattributable
Other
Costly
Execution 314ms
Transfer 0 KB
Monthly Cost $2/mo
www.apple.com
Other
Optional
Execution 181ms
Transfer 1 KB
Monthly Cost $1/mo
www.apple.com
Other
Optional
Execution 166ms
Transfer 38 KB
Monthly Cost $1/mo
www.apple.com
Other
Optional
Execution 149ms
Transfer 56 KB
Monthly Cost $1/mo
www.apple.com
Other
Optional
Execution 108ms
Transfer 102 KB
Unused 40%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.apple.com adds 873ms and costs ~$5/month
  • www.apple.com adds 849ms and costs ~$5/month
  • www.apple.com adds 572ms and costs ~$3/month
  • Unattributable adds 314ms and costs ~$2/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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 873ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.apple.com takes 849ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.apple.com takes 572ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 314ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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