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https://itunes.apple.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
5
PASS
6
INFO
2

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

Mobile Desktop
90
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
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.

1.07 s

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

1.75 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.

0.052

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.21 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.

1.75 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 s
Checks
15
6 PASS 5 REVIEW 2 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 (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
41 resources · 1.6 MB · 98 KB savings available
FIX
41 resources · 1.6 MB · 98 KB savings available
Warning::
Page weight 630 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~98 KB of savings available
Warning::
40 third-party resources (100% of weight)
41 resources · 1.6 MiB · 40 third-party 629.7 KiB over 1MB target
Font 44% · 727.5 KiB
Image 27% · 451.4 KiB
JavaScript 21% · 349.5 KiB
CSS 3% · 50.7 KiB
Other 3% · 44.2 KiB
Document 2% · 30.4 KiB

~97.8 KiB of savings available

Remove unused JavaScript: 97.8 KiB
C
Page Weight Budget
Action
1.6 MB transferred, 41 requests
REVIEW
1.6 MB transferred, 41 requests
Info::
Page weighs 2.6 MB (1.6 MB transferred)
Info::
Fonts are 728 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 728 KB
Info::
41 HTTP requests
Info::
Estimated 0.34 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
41 requests
0.34 g CO2 per page load
Fonts 727.5 KiB 44%
Images 428.8 KiB 26%
JavaScript 349.5 KiB 21%
CSS 50.7 KiB 3%
Other 41.3 KiB 2%
HTML 29.2 KiB 2%
Other 24.7 KiB 1%
Other 2.0 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

B
Image Optimization
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Info::
All images are well-optimized
7 images 429 KB
0 oversized -0 KB
7 legacy format
0 missing dimensions CLS risk
B
JS Bundles
9 scripts, 98 KB unused
REVIEW
9 scripts, 98 KB unused
Warning::
https://www.apple.com/api-www/global-elements/glob...: 57 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.
Info::
Total unused JavaScript: 98 KB
98 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js161 KB57 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/itunes/home/l/built/scripts/head.built.js13 KB—✓3rd
https://www.apple.com/metrics/ac-analytics/2.29.1/scripts/auto-init.js1 KB—✓3rd
https://www.apple.com/metrics/data-relay/1.2.0/scripts/data-relay.js6 KB—✓3rd
https://www.apple.com/metrics/data-relay/1.2.0/scripts/auto-relay.js1 KB—✓3rd
https://www.apple.com/ac/globalfooter/8/en_US/scripts/ac-globalfooter.built.js4 KB—✓3rd
https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.js56 KB—✓3rd
https://www.apple.com/v/itunes/home/l/built/scripts/main.built.js6 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

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

Green Hosting

No green hosting detected

B
HTTP Caching
no-transform, max-age=0
REVIEW
no-transform, max-age=0
Info::
Cache-Control header is set
Got: no-transform, max-age=0
Info::
Last-Modified header present
Cache-Control

no-transform, max-age=0

DirectiveValueMeaning
no-transform—
max-age0Cache for 0 seconds
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+
JS Execution Cost
324ms total JS execution
PASS
324ms total JS execution
Info::
https://www.apple.com/itunes/: 154ms CPU time
Info::
https://www.apple.com/api-www/global-elements/glob...: 112ms CPU time
Info::
Unattributable: 58ms CPU time
Warning::
Third-party scripts: 324ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Style & Layout 33% Other 19% Script Parsing & Compilation 4% Parse HTML & CSS 4% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.apple.com/itunes/154ms1ms0ms3rd
https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js112ms57ms3ms3rd
Unattributable58ms2ms0ms3rd
A+
Font Loading
10 fonts (728 KB)
PASS
10 fonts (728 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

728 KB total

Render-blocking

0

of 10

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 1.1 s LCP 1.8 shttps://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold.woff2sf-pro-text_semibold.woff2 https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold.woff2 — 107.9 KiB — 8 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_regular.woff2sf-pro-text_regular.woff2 https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_regular.woff2 — 97.6 KiB — 47 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_semibold.woff2sf-pro-display_semibold... https://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_semibold.woff2 — 107.8 KiB — 11 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_bold.woff2sf-pro-text_bold.woff2 https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_bold.woff2 — 106.8 KiB — 37 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_regular.woff2sf-pro-display_regular.... https://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_regular.woff2 — 96.3 KiB — 46 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_regular.woffSFProIcons_regular.woff https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_regular.woff — 10.8 KiB — 31 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold-italic.woff2sf-pro-text_semibold-it... https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold-italic.woff2 — 72.9 KiB — 45 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_semibold.woffSFProIcons_semibold.woff https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_semibold.woff — 9.4 KiB — 43 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_light.woffSFProIcons_light.woff https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_light.woff — 10.9 KiB — 43 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_light.woff2sf-pro-text_light.woff2 https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_light.woff2 — 107.1 KiB — 44 ms — font-display: swap
sf-pro-text_semibold.woff2 woff2 swap
Size 108 KB
Load time 8 ms
Start 737 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 98 KB
Load time 47 ms
Start 737 ms
Risk FOUT — text flashes from fallback to web font
sf-pro-display_semibold... woff2 swap
Size 108 KB
Load time 11 ms
Start 737 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 107 KB
Load time 37 ms
Start 1.1 s
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_regular.... woff2 swap
Size 96 KB
Load time 46 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
SFProIcons_regular.woff woff swap
Size 11 KB
Load time 31 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
sf-pro-text_semibold-it... woff2 swap
Size 73 KB
Load time 45 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
SFProIcons_semibold.woff woff swap
Size 9 KB
Load time 43 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
SFProIcons_light.woff woff swap
Size 11 KB
Load time 43 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
sf-pro-text_light.woff2 woff2 swap
Size 107 KB
Load time 44 ms
Start 1.3 s
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 ~224 KB and ~448 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
Network Waterfall
41 requests over 1339ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.1 s LCP 1.8 shttps://itunes.apple.com// https://itunes.apple.com/ — 301 — 1.2 KiB — 232 ms — h2https://www.apple.com/itunes/www.apple.com/itunes/ https://www.apple.com/itunes/ — 200 — 29.2 KiB — 82 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 — 68 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 — 61 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 — 86 ms — h2https://www.apple.com/wss/fonts?families=SF+Pro,v2|SF+Pro+Icons,v1www.apple.com/wss/fonts?families=SF... https://www.apple.com/wss/fonts?families=SF+Pro,v2|SF+Pro+Icons,v1 — 200 — 1.8 KiB — 363 ms — h2https://www.apple.com/v/itunes/home/l/built/styles/main.built.csswww.apple.com/v/itunes/home/l/built... https://www.apple.com/v/itunes/home/l/built/styles/main.built.css — 200 — 8.5 KiB — 66 ms — h2https://www.apple.com/v/itunes/home/l/built/styles/overview.built.csswww.apple.com/v/itunes/home/l/built... https://www.apple.com/v/itunes/home/l/built/styles/overview.built.css — 200 — 4.1 KiB — 63 ms — h2https://www.apple.com/v/itunes/home/l/built/scripts/head.built.jswww.apple.com/v/itunes/home/l/built... https://www.apple.com/v/itunes/home/l/built/scripts/head.built.js — 200 — 13.3 KiB — 84 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 — 114 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 — 693 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 — 850 B — 62 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 — 109 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 — 937 B — 111 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 — 63 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 — 648 ms — h2https://www.apple.com/v/itunes/home/l/built/scripts/main.built.jswww.apple.com/v/itunes/home/l/built... https://www.apple.com/v/itunes/home/l/built/scripts/main.built.js — 200 — 6.1 KiB — 64 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold.woff2 — 200 — 107.9 KiB — 8 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_regular.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_regular.woff2 — 200 — 97.6 KiB — 47 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_semibold.woff2www.apple.com/wss/fonts/SF-Pro-Disp... https://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_semibold.woff2 — 200 — 107.8 KiB — 11 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 — 47 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 — 43 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 — 789 B — 17 ms — h2https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s88653894714262?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2018%3A46%3A34%202%200&fid=2B593766D2B9293B-24F3A0E3BDE3BACA&ce=UTF-8&cdp=2&cl=1800&pageName=itunes%20-%20index%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fitunes%2F&cc=USD&ch=www.us.itunes&server=ac-2.29.1&h1=www.us.itunes&c2=itunes%20macos%20view&v3=aos%3A%20us&l3=D%3Das_tex&c4=D%3Dg&v4=D%3DpageName&v14=en-us&c20=aos%3A%20us&v54=D%3Dg&v97=s.t-p&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&AQE=1securemetrics.apple.com/b/ss/apples... https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s88653894714262?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2018%3A46%3A34%202%200&fid=2B593766D2B9293B-24F3A0E3BDE3BACA&ce=UTF-8&cdp=2&cl=1800&pageName=itunes%20-%20index%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fitunes%2F&cc=USD&ch=www.us.itunes&server=ac-2.29.1&h1=www.us.itunes&c2=itunes%20macos%20view&v3=aos%3A%20us&l3=D%3Das_tex&c4=D%3Dg&v4=D%3DpageName&v14=en-us&c20=aos%3A%20us&v54=D%3Dg&v97=s.t-p&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&AQE=1 — 302 — 920 B — 185 ms — h2https://www.apple.com/ac/localeswitcher/4/es_ES/content/localeswitcher.jsonwww.apple.com/ac/localeswitcher/4/e... https://www.apple.com/ac/localeswitcher/4/es_ES/content/localeswitcher.json — 200 — 1.2 KiB — 4 ms — h2https://www.apple.com/v/itunes/home/l/images/overview/screen_new_mix__cb9y8qvsvb0i_large.jpgwww.apple.com/v/itunes/home/l/image... https://www.apple.com/v/itunes/home/l/images/overview/screen_new_mix__cb9y8qvsvb0i_large.jpg — 200 — 110.8 KiB — 66 ms — h2https://www.apple.com/v/itunes/home/l/images/overview/mbair_itunes__bkf9ksiikx6u_large.pngwww.apple.com/v/itunes/home/l/image... https://www.apple.com/v/itunes/home/l/images/overview/mbair_itunes__bkf9ksiikx6u_large.png — 200 — 53.3 KiB — 41 ms — h2https://www.apple.com/v/itunes/home/l/images/overview/screen_appletv__gd3vm2df43iq_large.jpgwww.apple.com/v/itunes/home/l/image... https://www.apple.com/v/itunes/home/l/images/overview/screen_appletv__gd3vm2df43iq_large.jpg — 200 — 129.1 KiB — 58 ms — h2https://www.apple.com/v/itunes/home/l/images/overview/screen_podcasts__di6468i1b6c2_large.jpgwww.apple.com/v/itunes/home/l/image... https://www.apple.com/v/itunes/home/l/images/overview/screen_podcasts__di6468i1b6c2_large.jpg — 200 — 132.8 KiB — 61 ms — h2https://www.apple.com/ac/globalfooter/8/en_US/assets/ac-footer/breadcrumbs/apple/icon_large.svgwww.apple.com/ac/globalfooter/8/en_... https://www.apple.com/ac/globalfooter/8/en_US/assets/ac-footer/breadcrumbs/apple/icon_large.svg — 200 — 1.4 KiB — 4 ms — h2
0 ms 500 ms 1.0 s 1.5 s FCP 1.1 s LCP 1.8 shttps://itunes.apple.com// https://itunes.apple.com/ — 301 — 1.2 KiB — 232 ms — h2https://www.apple.com/itunes/www.apple.com/itunes/ https://www.apple.com/itunes/ — 200 — 29.2 KiB — 82 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 — 68 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 — 61 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 — 86 ms — h2https://www.apple.com/wss/fonts?families=SF+Pro,v2|SF+Pro+Icons,v1www.apple.com/wss/fonts?families=SF... https://www.apple.com/wss/fonts?families=SF+Pro,v2|SF+Pro+Icons,v1 — 200 — 1.8 KiB — 363 ms — h2https://www.apple.com/v/itunes/home/l/built/styles/main.built.csswww.apple.com/v/itunes/home/l/built... https://www.apple.com/v/itunes/home/l/built/styles/main.built.css — 200 — 8.5 KiB — 66 ms — h2https://www.apple.com/v/itunes/home/l/built/styles/overview.built.csswww.apple.com/v/itunes/home/l/built... https://www.apple.com/v/itunes/home/l/built/styles/overview.built.css — 200 — 4.1 KiB — 63 ms — h2https://www.apple.com/v/itunes/home/l/built/scripts/head.built.jswww.apple.com/v/itunes/home/l/built... https://www.apple.com/v/itunes/home/l/built/scripts/head.built.js — 200 — 13.3 KiB — 84 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 — 114 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 — 693 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 — 850 B — 62 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 — 109 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 — 937 B — 111 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 — 63 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 — 648 ms — h2https://www.apple.com/v/itunes/home/l/built/scripts/main.built.jswww.apple.com/v/itunes/home/l/built... https://www.apple.com/v/itunes/home/l/built/scripts/main.built.js — 200 — 6.1 KiB — 64 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold.woff2 — 200 — 107.9 KiB — 8 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_regular.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_regular.woff2 — 200 — 97.6 KiB — 47 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_semibold.woff2www.apple.com/wss/fonts/SF-Pro-Disp... https://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_semibold.woff2 — 200 — 107.8 KiB — 11 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 — 47 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 — 43 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 — 789 B — 17 ms — h2https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s88653894714262?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2018%3A46%3A34%202%200&fid=2B593766D2B9293B-24F3A0E3BDE3BACA&ce=UTF-8&cdp=2&cl=1800&pageName=itunes%20-%20index%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fitunes%2F&cc=USD&ch=www.us.itunes&server=ac-2.29.1&h1=www.us.itunes&c2=itunes%20macos%20view&v3=aos%3A%20us&l3=D%3Das_tex&c4=D%3Dg&v4=D%3DpageName&v14=en-us&c20=aos%3A%20us&v54=D%3Dg&v97=s.t-p&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&AQE=1securemetrics.apple.com/b/ss/apples... https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s88653894714262?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2018%3A46%3A34%202%200&fid=2B593766D2B9293B-24F3A0E3BDE3BACA&ce=UTF-8&cdp=2&cl=1800&pageName=itunes%20-%20index%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fitunes%2F&cc=USD&ch=www.us.itunes&server=ac-2.29.1&h1=www.us.itunes&c2=itunes%20macos%20view&v3=aos%3A%20us&l3=D%3Das_tex&c4=D%3Dg&v4=D%3DpageName&v14=en-us&c20=aos%3A%20us&v54=D%3Dg&v97=s.t-p&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&AQE=1 — 302 — 920 B — 185 ms — h2https://www.apple.com/ac/localeswitcher/4/es_ES/content/localeswitcher.jsonwww.apple.com/ac/localeswitcher/4/e... https://www.apple.com/ac/localeswitcher/4/es_ES/content/localeswitcher.json — 200 — 1.2 KiB — 4 ms — h2https://www.apple.com/v/itunes/home/l/images/overview/screen_new_mix__cb9y8qvsvb0i_large.jpgwww.apple.com/v/itunes/home/l/image... https://www.apple.com/v/itunes/home/l/images/overview/screen_new_mix__cb9y8qvsvb0i_large.jpg — 200 — 110.8 KiB — 66 ms — h2https://www.apple.com/v/itunes/home/l/images/overview/mbair_itunes__bkf9ksiikx6u_large.pngwww.apple.com/v/itunes/home/l/image... https://www.apple.com/v/itunes/home/l/images/overview/mbair_itunes__bkf9ksiikx6u_large.png — 200 — 53.3 KiB — 41 ms — h2https://www.apple.com/v/itunes/home/l/images/overview/screen_appletv__gd3vm2df43iq_large.jpgwww.apple.com/v/itunes/home/l/image... https://www.apple.com/v/itunes/home/l/images/overview/screen_appletv__gd3vm2df43iq_large.jpg — 200 — 129.1 KiB — 58 ms — h2https://www.apple.com/v/itunes/home/l/images/overview/screen_podcasts__di6468i1b6c2_large.jpgwww.apple.com/v/itunes/home/l/image... https://www.apple.com/v/itunes/home/l/images/overview/screen_podcasts__di6468i1b6c2_large.jpg — 200 — 132.8 KiB — 61 ms — h2https://www.apple.com/ac/globalfooter/8/en_US/assets/ac-footer/breadcrumbs/apple/icon_large.svgwww.apple.com/ac/globalfooter/8/en_... https://www.apple.com/ac/globalfooter/8/en_US/assets/ac-footer/breadcrumbs/apple/icon_large.svg — 200 — 1.4 KiB — 4 ms — h2https://www.apple.com/ac/globalfooter/8/en_US/assets/ac-footer/breadcrumbs/separator/icon_large.svgwww.apple.com/ac/globalfooter/8/en_... https://www.apple.com/ac/globalfooter/8/en_US/assets/ac-footer/breadcrumbs/separator/icon_large.svg — 200 — 996 B — 8 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_bold.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_bold.woff2 — 200 — 106.8 KiB — 37 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_regular.woff2www.apple.com/wss/fonts/SF-Pro-Disp... https://www.apple.com/wss/fonts/SF-Pro-Display/v2/sf-pro-display_regular.woff2 — 200 — 96.3 KiB — 46 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_regular.woffwww.apple.com/wss/fonts/SF-Pro-Icon... https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_regular.woff — 200 — 10.8 KiB — 31 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold-italic.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_semibold-italic.woff2 — 200 — 72.9 KiB — 45 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_semibold.woffwww.apple.com/wss/fonts/SF-Pro-Icon... https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_semibold.woff — 200 — 9.4 KiB — 43 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 — 28 ms — h2https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s88653894714262?AQB=1&pccr=true&vidn=34F3E3057FF30A8A-400007C144E64B3B&ndh=1&pf=1&t=21%2F3%2F2026%2018%3A46%3A34%202%200&fid=2B593766D2B9293B-24F3A0E3BDE3BACA&ce=UTF-8&cdp=2&cl=1800&pageName=itunes%20-%20index%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fitunes%2F&cc=USD&ch=www.us.itunes&server=ac-2.29.1&h1=www.us.itunes&c2=itunes%20macos%20view&v3=aos%3A%20us&l3=D%3Das_tex&c4=D%3Dg&v4=D%3DpageName&v14=en-us&c20=aos%3A%20us&v54=D%3Dg&v97=s.t-p&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&AQE=1securemetrics.apple.com/b/ss/apples... https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s88653894714262?AQB=1&pccr=true&vidn=34F3E3057FF30A8A-400007C144E64B3B&ndh=1&pf=1&t=21%2F3%2F2026%2018%3A46%3A34%202%200&fid=2B593766D2B9293B-24F3A0E3BDE3BACA&ce=UTF-8&cdp=2&cl=1800&pageName=itunes%20-%20index%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fitunes%2F&cc=USD&ch=www.us.itunes&server=ac-2.29.1&h1=www.us.itunes&c2=itunes%20macos%20view&v3=aos%3A%20us&l3=D%3Das_tex&c4=D%3Dg&v4=D%3DpageName&v14=en-us&c20=aos%3A%20us&v54=D%3Dg&v97=s.t-p&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&AQE=1 — 200 — 582 B — 53 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_light.woffwww.apple.com/wss/fonts/SF-Pro-Icon... https://www.apple.com/wss/fonts/SF-Pro-Icons/v1/SFProIcons_light.woff — 200 — 10.9 KiB — 43 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_light.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v2/sf-pro-text_light.woff2 — 200 — 107.1 KiB — 44 ms — h2https://www.apple.com/favicon.icowww.apple.com/favicon.ico https://www.apple.com/favicon.ico — 200 — 22.6 KiB — 6 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 324ms · 190KB · $2/mo
www.apple.com
Other
Optional
Execution 154ms
Transfer 29 KB
Monthly Cost $1/mo
www.apple.com
Other
Optional
Execution 112ms
Transfer 161 KB
Unused 35%
Monthly Cost $1/mo
Unattributable
Other
Optional
Execution 58ms
Transfer 0 KB
Monthly Cost $0/mo

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

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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