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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
47
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.
85
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.

1.03 s

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

3.32 s

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

878 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.

2.34 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.

3.57 s

Page Load Progression

628 ms
1.3 s
1.9 s
2.5 s
3.1 s
3.8 s
4.4 s
5.0 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
5.2 MB transferred, 115 requests
FIX
5.2 MB transferred, 115 requests
Critical::
Page weighs 7.9 MB (5.2 MB transferred)
Warning::
Images are 3.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.2 MB
Info::
Fonts are 910 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 910 KB
Warning::
JavaScript is 750 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 750 KB
Warning::
115 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.1 g CO2 per page load
5.2 MB / 2.4 MB budget
5.2 MB transferred
115 requests
1.1 g CO2 per page load
Images 3.2 MiB 62%
Fonts 909.9 KiB 17%
JavaScript 750.0 KiB 14%
HTML 179.6 KiB 3%
CSS 112.3 KiB 2%
Other 41.3 KiB 1%
Other 23.7 KiB 0%
Other 4.4 KiB 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (5.2 MiB of 5.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3764ms total JS execution
FIX
3764ms total JS execution
Warning::
https://www.apple.com/_apps/artisan/_next/static/c...: 1516ms CPU time
Warning::
https://www.apple.com/mac/: 750ms CPU time
Warning::
https://www.apple.com/_apps/artisan/_next/static/c...: 638ms CPU time
Warning::
Unattributable: 268ms CPU time
Info::
https://www.apple.com/api-www/global-elements/glob...: 247ms CPU time
Warning::
Third-party scripts: 3764ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Style & Layout 26% Other 15% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.apple.com/_apps/artisan/_next/static/chunks/framework-33b5afb7a08c1576.js1516ms1007ms8ms3rd
https://www.apple.com/mac/750ms7ms0ms3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/3218-096c15977036d74c.js638ms515ms3ms3rd
Unattributable268ms6ms0ms3rd
https://www.apple.com/api-www/global-elements/global-header/v1/assets/globalheader.umd.js247ms104ms7ms3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/8681.c0c493e72a8744bf.js155ms71ms6ms3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/pages/%5B%5B...uri%5D%5D-69f045b97a10d47c.js129ms126ms2ms3rd
https://www.apple.com/ac/localeswitcher/4/en_US/scripts/localeswitcher.built.js60ms51ms7ms3rd
D
Page Weight Inventory
Action
115 resources · 5.2 MB · 142 KB savings available
FIX
115 resources · 5.2 MB · 142 KB savings available
Warning::
Page weight 4.2 MB over 1MB target
Got: 5.2 MB Expected: ≤ 1 MB
Info::
~142 KB of savings available
Warning::
114 third-party resources (100% of weight)
Info::
6 resources over 200KB
115 resources · 5.2 MiB · 114 third-party 4.2 MiB over 1MB target
Image 62% · 3.2 MiB
Font 17% · 909.9 KiB
JavaScript 14% · 750.0 KiB
Document 3% · 179.6 KiB
CSS 2% · 112.3 KiB
Other 1% · 46.7 KiB

~141.8 KiB of savings available

Remove unused JavaScript: 141.8 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
Image Optimization
Action
30 images, 0 KB saveable
REVIEW
30 images, 0 KB saveable
Warning::
https://www.apple.com/assets-www/en_WW/common/colo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.apple.com/assets-www/en_WW/common/colo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.apple.com/assets-www/en_WW/common/colo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.apple.com/assets-www/en_WW/common/colo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.apple.com/assets-www/en_WW/common/colo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.apple.com/assets-www/en_WW/common/colo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
30 images 1.2 MB
0 oversized -0 KB
30 legacy format
6 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

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

B
JS Bundles
41 scripts, 142 KB unused
REVIEW
41 scripts, 142 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/latest/...: 40 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.apple.com/_apps/artisan/_next/static/c...: 25 KB unused (32%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.apple.com/_apps/artisan/_next/static/c...: 20 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 142 KB
142 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/latest/scripts/ac-analytics.js102 KB40 KB (39%)✓3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/4011.6f26d45a9009e19d.js83 KB25 KB (32%)✓3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/framework-33b5afb7a08c1576.js57 KB20 KB (35%)✓3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/4289.de8ad7926bd66077.js3 KB—✓3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/8187.53eaeb028e0a4466.js2 KB—✓3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/2655.8c2d68f5b692b5c5.js3 KB—✓3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/404.369664c416ddf080.js3 KB—✓3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/3581.9a70fa77e526ca84.js4 KB—✓3rd
https://www.apple.com/_apps/artisan/_next/static/chunks/webpack-57bef0fcc07fd16f.js4 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
7 fonts (910 KB)
PASS
7 fonts (910 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

910 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.0 s LCP 3.3 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 — 82 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 — 104 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 — 105 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 — 94 ms — font-display: swaphttps://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular-italic.woff2sf-pro-text_regular-ita... https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular-italic.woff2 — 87.1 KiB — 69 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 — 25 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 — 19 ms — font-display: swap
sf-pro-text_semibold.woff2 woff2 swap
Size 230 KB
Load time 82 ms
Start 735 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 104 ms
Start 736 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 105 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-icons_regular.woff2 woff2 swap
Size 15 KB
Load time 94 ms
Start 738 ms
Risk FOUT — text flashes from fallback to web font
sf-pro-text_regular-ita... woff2 swap
Size 87 KB
Load time 69 ms
Start 907 ms
Risk FOUT — text flashes from fallback to web font
sf-pro-icons_light.woff2 woff2 swap
Size 15 KB
Load time 25 ms
Start 4.3 s
Risk FOUT — text flashes from fallback to web font
sf-pro-text_light.woff2 woff2 swap
Size 221 KB
Load time 19 ms
Start 4.3 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 ~397 KB and ~794 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
115 requests over 4354ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.0 s LCP 3.3 shttps://mac.com// https://mac.com/ — 301 — 171 B — 312 ms — http/1.1https://www.apple.com/mac/www.apple.com/mac/ https://www.apple.com/mac/ — 200 — 179.6 KiB — 50 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 — 43 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 — 112 ms — h2https://www.apple.com/api-www/global-elements/global-footer/v1/en_US/styles/ac-globalfooter.built.csswww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-footer/v1/en_US/styles/ac-globalfooter.built.css — 200 — 7.2 KiB — 60 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/498a874b708d3e34.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/498a874b708d3e34.css — 200 — 2.1 KiB — 19 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/417d3d58f6234fc6.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/417d3d58f6234fc6.css — 200 — 1.1 KiB — 24 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/8b2ef0570fd4ba03.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/8b2ef0570fd4ba03.css — 200 — 6.4 KiB — 37 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/dcedc79846b0fd08.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/dcedc79846b0fd08.css — 200 — 8.5 KiB — 37 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/2caa76f2fa3e0658.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/2caa76f2fa3e0658.css — 200 — 2.7 KiB — 31 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/f09b3d43b5389f37.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/f09b3d43b5389f37.css — 200 — 4.8 KiB — 33 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/51000e145a3a2a18.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/51000e145a3a2a18.css — 200 — 1.3 KiB — 35 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/4dbc8c626063a4cd.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/4dbc8c626063a4cd.css — 200 — 12.9 KiB — 58 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/07f7d58af4490b24.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/07f7d58af4490b24.css — 200 — 3.0 KiB — 44 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/d3c0449160015d61.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/d3c0449160015d61.css — 200 — 1.1 KiB — 46 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/18c7717d1ab29662.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/18c7717d1ab29662.css — 200 — 924 B — 50 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/edd2ad9bc0f3cfce.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/edd2ad9bc0f3cfce.css — 200 — 6.7 KiB — 58 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/ca5ffcae0c9c515d.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/ca5ffcae0c9c515d.css — 200 — 1.0 KiB — 62 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/f23d69f76dd4e6da.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/f23d69f76dd4e6da.css — 200 — 16.1 KiB — 91 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/57f1908a3c00e5b6.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/57f1908a3c00e5b6.css — 200 — 2.8 KiB — 67 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/67f01a261c657e9a.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/67f01a261c657e9a.css — 200 — 1.9 KiB — 69 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/9eecdfa3b58ac8da.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/9eecdfa3b58ac8da.css — 200 — 1.0 KiB — 95 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/00accf4fb7b6e219.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/00accf4fb7b6e219.css — 200 — 2.1 KiB — 74 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/3699a7a5c091eb48.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/3699a7a5c091eb48.css — 200 — 3.0 KiB — 77 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/f0cdbc3f94918df0.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/f0cdbc3f94918df0.css — 200 — 1.8 KiB — 79 ms — h2https://www.apple.com/_apps/artisan/_next/static/css/a0e4784527c34313.csswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/css/a0e4784527c34313.css — 200 — 1023 B — 82 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_chapternav/small/nav_mbn_1fa302e95.pngwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_chapternav/small/nav_mbn_1fa302e95.png — 200 — 5.2 KiB — 98 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_chapternav/small/nav_mba_ea12e0d5b.pngwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_chapternav/small/nav_mba_ea12e0d5b.png — 200 — 9.1 KiB — 90 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_chapternav/small/nav_mbp_bfa749034.pngwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_chapternav/small/nav_mbp_bfa749034.png — 200 — 4.9 KiB — 26 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_chapternav/small/nav_imac_24_832584093.pngwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_chapternav/small/nav_imac_24_832584093.png — 200 — 6.1 KiB — 27 ms — h2
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https://www.apple.com/assets-www/en_WW/common/color_indicator/fp_color_indicator_yellow_3d07e057d.png — 200 — 709 B — 163 ms — h2https://www.apple.com/assets-www/en_WW/common/color_indicator/fp_color_indicator_green_f02f2102c.pngwww.apple.com/assets-www/en_WW/comm... https://www.apple.com/assets-www/en_WW/common/color_indicator/fp_color_indicator_green_f02f2102c.png — 200 — 696 B — 165 ms — h2https://www.apple.com/mac/www.apple.com/mac/ https://www.apple.com/mac/ — 200 — 1009.7 KiB — 188 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 — 82 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 — 104 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 — 105 ms — 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 — 94 ms — h2https://www.apple.com/mac/www.apple.com/mac/ https://www.apple.com/mac/ — 200 — 64.0 KiB — 5 ms — h2https://www.apple.com/api-www/global-elements/global-footer/v1/en_US/assets/ac-footer/breadcrumbs/apple/icon_large.svgwww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-footer/v1/en_US/assets/ac-footer/breadcrumbs/apple/icon_large.svg — 200 — 1.4 KiB — 24 ms — h2https://www.apple.com/api-www/global-elements/global-footer/v1/en_US/assets/ac-footer/breadcrumbs/separator/icon_large.svgwww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-footer/v1/en_US/assets/ac-footer/breadcrumbs/separator/icon_large.svg — 200 — 1.0 KiB — 20 ms — h2https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular-italic.woff2www.apple.com/wss/fonts/SF-Pro-Text... https://www.apple.com/wss/fonts/SF-Pro-Text/v3/sf-pro-text_regular-italic.woff2 — 200 — 87.1 KiB — 69 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 — 23 ms — h2https://www.apple.com/metrics/ac-analytics/latest/scripts/ac-analytics.jswww.apple.com/metrics/ac-analytics/... https://www.apple.com/metrics/ac-analytics/latest/scripts/ac-analytics.js — 200 — 102.1 KiB — 250 ms — h2https://www.apple.com/_apps/artisan/_next/static/chunks/1877.a67182df231d8046.jswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/chunks/1877.a67182df231d8046.js — 200 — 4.1 KiB — 35 ms — h2https://www.apple.com/_apps/artisan/_next/static/chunks/9629.7761d981bb19b3c6.jswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/chunks/9629.7761d981bb19b3c6.js — 200 — 1.6 KiB — 48 ms — h2https://www.apple.com/_apps/artisan/_next/static/chunks/2123.379dc4f726ad0007.jswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/chunks/2123.379dc4f726ad0007.js — 200 — 5.5 KiB — 30 ms — h2https://www.apple.com/mac/www.apple.com/mac/ https://www.apple.com/mac/ — 200 — 1009.7 KiB — 10 ms — h2https://www.apple.com/us/shop/mcm/product-price?parts=IMAC2024_MAIN,MACBOOKAIR_M5_MAIN_2026,MACBOOKPRO_M5_MAIN_2026,MACMINI2024-MAIN,MACSTUDIO2025_MAIN,MBN_2026_MAIN,MFEL4,STUDIODISPLAY_MAINwww.apple.com/us/shop/mcm/product-p... https://www.apple.com/us/shop/mcm/product-price?parts=IMAC2024_MAIN,MACBOOKAIR_M5_MAIN_2026,MACBOOKPRO_M5_MAIN_2026,MACMINI2024-MAIN,MACSTUDIO2025_MAIN,MBN_2026_MAIN,MFEL4,STUDIODISPLAY_MAIN — 200 — 1.9 KiB — 191 ms — h2https://www.apple.com/_apps/artisan/_next/static/chunks/1063.af04dca0330c0f57.jswww.apple.com/_apps/artisan/_next/s... https://www.apple.com/_apps/artisan/_next/static/chunks/1063.af04dca0330c0f57.js — 200 — 1.2 KiB — 10 ms — h2https://www.apple.com/metrics/data-relay/latest/scripts/data-relay.jswww.apple.com/metrics/data-relay/la... https://www.apple.com/metrics/data-relay/latest/scripts/data-relay.js — 200 — 6.0 KiB — 7 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mbn_37b3fdaaf.jpgwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mbn_37b3fdaaf.jpg — 200 — 13.7 KiB — 15 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mba_13_15_e733a3435.jpgwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mba_13_15_e733a3435.jpg — 200 — 26.5 KiB — 18 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mbp_14_16_fa5e3a2b2.jpgwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mbp_14_16_fa5e3a2b2.jpg — 200 — 10.6 KiB — 35 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/imac_24_7732743f3.jpgwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/imac_24_7732743f3.jpg — 200 — 16.6 KiB — 26 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mac_mini_d300dfe42.jpgwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mac_mini_d300dfe42.jpg — 200 — 3.0 KiB — 26 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mac_studio_e9f221da0.jpgwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/mac_studio_e9f221da0.jpg — 200 — 4.1 KiB — 29 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/studio_display_5c60e52bb.jpgwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/studio_display_5c60e52bb.jpg — 200 — 21.5 KiB — 29 ms — h2https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/studio_display_xdr_fef4b71f1.jpgwww.apple.com/assets-www/en_WW/mac/... https://www.apple.com/assets-www/en_WW/mac/04_product_tile/large/studio_display_xdr_fef4b71f1.jpg — 200 — 23.2 KiB — 16 ms — h2https://www.apple.com/mac/www.apple.com/mac/ https://www.apple.com/mac/ — 200 — 1009.7 KiB — 69 ms — h2https://www.apple.com/favicon.icowww.apple.com/favicon.ico https://www.apple.com/favicon.ico — 200 — 22.6 KiB — 10 ms — h2https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s85584590065940?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2020%3A17%3A31%202%200&fid=394DC2955E7E46A2-26C7AD482057D763&ce=UTF-8&cdp=2&cl=1800&pageName=mac%20-%20index%2Ftab%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fmac%2F&cc=USD&ch=www.us.mac.tab%2Bother&server=ac-2.29.1&h1=www.us.mac.tab%2Bother&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/s85584590065940?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2020%3A17%3A31%202%200&fid=394DC2955E7E46A2-26C7AD482057D763&ce=UTF-8&cdp=2&cl=1800&pageName=mac%20-%20index%2Ftab%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fmac%2F&cc=USD&ch=www.us.mac.tab%2Bother&server=ac-2.29.1&h1=www.us.mac.tab%2Bother&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 — 915 B — 92 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 — 57 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 — 53 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 — 1.3 KiB — 192 ms — h2https://securemetrics.apple.com/b/ss/applestoreww/1/JS-2.23.0/s85584590065940?AQB=1&pccr=true&vidn=34F3EDADB1D37946-4000059E68654286&ndh=1&pf=1&t=21%2F3%2F2026%2020%3A17%3A31%202%200&fid=394DC2955E7E46A2-26C7AD482057D763&ce=UTF-8&cdp=2&cl=1800&pageName=mac%20-%20index%2Ftab%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fmac%2F&cc=USD&ch=www.us.mac.tab%2Bother&server=ac-2.29.1&h1=www.us.mac.tab%2Bother&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/s85584590065940?AQB=1&pccr=true&vidn=34F3EDADB1D37946-4000059E68654286&ndh=1&pf=1&t=21%2F3%2F2026%2020%3A17%3A31%202%200&fid=394DC2955E7E46A2-26C7AD482057D763&ce=UTF-8&cdp=2&cl=1800&pageName=mac%20-%20index%2Ftab%20%28us%29&g=https%3A%2F%2Fwww.apple.com%2Fmac%2F&cc=USD&ch=www.us.mac.tab%2Bother&server=ac-2.29.1&h1=www.us.mac.tab%2Bother&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 — 40 ms — h2https://www.apple.com/api-www/global-elements/global-footer/v1/en_US/scripts/ac-globalfooter.built.jswww.apple.com/api-www/global-elemen... https://www.apple.com/api-www/global-elements/global-footer/v1/en_US/scripts/ac-globalfooter.built.js — 200 — 10.2 KiB — 20 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 — 62 ms — h2https://www.apple.com/ac/localeswitcher/4/nl_NL/content/localeswitcher.jsonwww.apple.com/ac/localeswitcher/4/n... https://www.apple.com/ac/localeswitcher/4/nl_NL/content/localeswitcher.json — 200 — 1.2 KiB — 7 ms — h2https://www.apple.com/ac/localeswitcher/4/nl_NL/styles/localeswitcher.built.csswww.apple.com/ac/localeswitcher/4/n... https://www.apple.com/ac/localeswitcher/4/nl_NL/styles/localeswitcher.built.css — 200 — 5.3 KiB — 11 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 — 25 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 — 19 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 3764ms · 1372KB · $22/mo
www.apple.com
Other
Costly
Execution 1516ms
Transfer 57 KB
Unused 35%
Monthly Cost $9/mo
www.apple.com
Other
Costly
Execution 750ms
Transfer 1010 KB
Monthly Cost $4/mo
www.apple.com
Other
Costly
Execution 638ms
Transfer 25 KB
Monthly Cost $4/mo
Unattributable
Other
Costly
Execution 268ms
Transfer 0 KB
Monthly Cost $2/mo
www.apple.com
Other
Costly
Execution 247ms
Transfer 161 KB
Unused 35%
Monthly Cost $1/mo
www.apple.com
Other
Optional
Execution 155ms
Transfer 42 KB
Monthly Cost $1/mo
www.apple.com
Other
Optional
Execution 129ms
Transfer 21 KB
Monthly Cost $1/mo
www.apple.com
Other
Optional
Execution 60ms
Transfer 56 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • www.apple.com adds 1516ms and costs ~$9/month
  • www.apple.com adds 750ms and costs ~$4/month
  • www.apple.com adds 638ms and costs ~$4/month
  • Unattributable adds 268ms and costs ~$2/month
  • www.apple.com adds 247ms and costs ~$1/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 1516ms 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 750ms 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 638ms 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 268ms 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 247ms 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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