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https://mcdonalds.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
52
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.
96
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.

876 ms

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

5.72 s

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

379 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.017

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

2.85 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.

6.29 s

Page Load Progression

416 ms
832 ms
1.2 s
1.7 s
2.1 s
2.5 s
2.9 s
3.3 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
6.6 MB transferred, 78 requests
FIX
6.6 MB transferred, 78 requests
Critical::
Page weighs 15.4 MB (6.6 MB transferred)
Warning::
Images are 5.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 5.0 MB
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Info::
78 HTTP requests
Info::
Estimated 1.4 g CO2 per page load
6.6 MB / 2.4 MB budget
6.6 MB transferred
78 requests
1.4 g CO2 per page load
Images 5.0 MiB 75%
JavaScript 1.4 MiB 22%
Fonts 52.4 KiB 1%
CSS 48.8 KiB 1%
Other 47.7 KiB 1%
HTML 24.4 KiB 0%
Other 6.0 KiB 0%
Other 5.8 KiB 0%
Other 0 B 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

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

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 (6.6 MiB of 6.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
21 scripts, 428 KB unused
FIX
21 scripts, 428 KB unused
Warning::
https://www.mcdonalds.com/etc.clientlibs/mcdonalds...: 246 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202505.2...: 63 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mcdonalds.com/HmghGO0K8C1uctsiLJI32GNK...: 35 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://mp-eu1.mcdonalds.com/tags/js/v2/eu1-28281b...: 34 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.go-mpulse.net/boomerang/FYHYC-U4X46-PMZ7...: 28 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 428 KB
428 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global.lc-6a720be6e625ca61e0eee805c8cbf7f5-lc.min.js281 KB246 KB (88%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js119 KB63 KB (53%)✓3rd
https://www.mcdonalds.com/HmghGO0K8C1uctsiLJI32GNKaWQ/OG1pSwhQXYrtVcEpb9/dnwZFnQB/TXl5BUI/zTlMB171 KB35 KB (21%)✓3rd
https://mp-eu1.mcdonalds.com/tags/js/v2/eu1-28281b86495a0d43a4b3cc1a9205178e/mparticle.js62 KB34 KB (55%)✓3rd
https://s.go-mpulse.net/boomerang/FYHYC-U4X46-PMZ7K-XB8KU-R9ZBH58 KB28 KB (66%)✓3rd
https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlibs-jquery-upgrade.lc-d7b1e75865cff046eb51cb2bcb68f114-lc.min.js35 KB23 KB (66%)✓3rd
https://assets.adobedtm.com/da51ad226ecd/1bcc6d6e5296/launch-a45af4f63d4c.min.js38 KB—✓3rd
https://assets.adobedtm.com/da51ad226ecd/1bcc6d6e5296/f6d725354913/RC775d3a1c3fc84b05901af97a21ea6b9e-source.min.js1 KB—✓3rd
https://www.mcdonalds.com/etc.clientlibs/core/wcm/components/commons/site/clientlibs/container.lc-0a6aff292f5cc42142779cde92054524-lc.min.js1 KB—✓3rd
https://rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js1 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

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

F
Page Weight Inventory
Action
78 resources · 6.6 MB · 428 KB savings available
FIX
78 resources · 6.6 MB · 428 KB savings available
Warning::
Page weight 5.6 MB over 1MB target
Got: 6.6 MB Expected: ≤ 1 MB
Info::
~428 KB of savings available
Warning::
77 third-party resources (100% of weight)
Info::
3 resources over 200KB
78 resources · 6.6 MiB · 77 third-party 5.6 MiB over 1MB target
Image 75% · 5.0 MiB
JavaScript 22% · 1.4 MiB
CSS 1% · 53.3 KiB
Font 1% · 52.4 KiB
Other 1% · 50.1 KiB
Document 0% · 25.4 KiB

~427.7 KiB of savings available

Remove unused JavaScript: 427.7 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
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Warning::
https://www.mcdonalds.com/content/dam/sites/nl/nfl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.mcdonalds.com/content/dam/sites/nl/nfl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.mcdonalds.com/content/dam/sites/nl/nfl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.mcdonalds.com/content/dam/sites/nl/nfl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.mcdonalds.com/content/dam/sites/nl/nfl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32 images 5.0 MB
0 oversized -0 KB
8 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 Execution Cost
Action
1794ms total JS execution
REVIEW
1794ms total JS execution
Warning::
https://cdn.cookielaw.org/consent/b8b69186-ef9f-48...: 395ms CPU time
Warning::
https://www.mcdonalds.com/HmghGO0K8C1uctsiLJI32GNK...: 314ms CPU time
Info::
Unattributable: 229ms CPU time
Info::
https://www.mcdonalds.com/nl/nl-nl.html: 218ms CPU time
Info::
https://www.mcdonalds.com/etc.clientlibs/mcdonalds...: 216ms CPU time
Warning::
Third-party scripts: 1794ms (100% of total)

Main Thread Breakdown

Script Evaluation 53% Script Parsing & Compilation 22% Other 13% Style & Layout 5% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://cdn.cookielaw.org/consent/b8b69186-ef9f-481e-9b4d-1c3abc41222c/OtAutoBlock.js395ms109ms286ms3rd
https://www.mcdonalds.com/HmghGO0K8C1uctsiLJI32GNKaWQ/OG1pSwhQXYrtVcEpb9/dnwZFnQB/TXl5BUI/zTlMB314ms285ms21ms3rd
Unattributable229ms56ms0ms3rd
https://www.mcdonalds.com/nl/nl-nl.html218ms12ms2ms3rd
https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global.lc-6a720be6e625ca61e0eee805c8cbf7f5-lc.min.js216ms124ms60ms3rd
https://assets.adobedtm.com/da51ad226ecd/1bcc6d6e5296/launch-a45af4f63d4c.min.js155ms125ms9ms3rd
https://cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js123ms88ms19ms3rd
https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-dependencies.lc-112fb9bad784754b2e6750b0c6c3f622-lc.min.js74ms63ms7ms3rd
https://www.mcdonalds.com/akam/13/48df242768ms64ms2ms3rd
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
3 fonts (52 KB)
PASS
3 fonts (52 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

52 KB total

Render-blocking

0

of 3

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 5.0 s 6.0 s FCP 876 ms LCP 5.7 shttps://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/icomoon/fonts/icomoon.ttficomoon.ttf https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/icomoon/fonts/icomoon.ttf — 4.6 KiB — 21 ms — font-display: swaphttps://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/Speedee/Speedee-Regular.woff2Speedee-Regular.woff2 https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/Speedee/Speedee-Regular.woff2 — 23.9 KiB — 59 ms — font-display: swaphttps://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/Speedee/Speedee-Bold.woff2Speedee-Bold.woff2 https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/Speedee/Speedee-Bold.woff2 — 23.9 KiB — 65 ms — font-display: swap
icomoon.ttf ttf swap
Size 5 KB
Load time 21 ms
Start 431 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Speedee-Regular.woff2 woff2 swap
Size 24 KB
Load time 59 ms
Start 431 ms
Risk FOUT — text flashes from fallback to web font
Speedee-Bold.woff2 woff2 swap
Size 24 KB
Load time 65 ms
Start 431 ms
Risk FOUT — text flashes from fallback to web font
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 ~1 KB and ~2 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
78 requests over 2589ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 876 ms LCP 5.7 shttps://mcdonalds.com// https://mcdonalds.com/ — 301 — 276 B — 291 ms — http/1.1https://www.mcdonalds.com/www.mcdonalds.com/ https://www.mcdonalds.com/ — 302 — 1.7 KiB — 25 ms — h2https://www.mcdonalds.com/nl/nl-nl.htmlwww.mcdonalds.com/nl/nl-nl.html https://www.mcdonalds.com/nl/nl-nl.html — 200 — 24.4 KiB — 98 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/icomoon/fonts/icomoon.ttfwww.mcdonalds.com/etc.clientlibs/mc... https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/icomoon/fonts/icomoon.ttf — 200 — 4.6 KiB — 21 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/Speedee/Speedee-Regular.woff2www.mcdonalds.com/etc.clientlibs/mc... https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/Speedee/Speedee-Regular.woff2 — 200 — 23.9 KiB — 59 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/Speedee/Speedee-Bold.woff2www.mcdonalds.com/etc.clientlibs/mc... https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global/resources/fonts/Speedee/Speedee-Bold.woff2 — 200 — 23.9 KiB — 65 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-grid.lc-4fb628f2edf7b457c6ec0b16fbabb054-lc.min.csswww.mcdonalds.com/etc.clientlibs/mc... https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-grid.lc-4fb628f2edf7b457c6ec0b16fbabb054-lc.min.css — 200 — 5.2 KiB — 48 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlibs-jquery-upgrade.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.csswww.mcdonalds.com/etc.clientlibs/mc... https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlibs-jquery-upgrade.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css — 200 — 561 B — 37 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/dynamicmedia.lc-a97e0418f0d0d6fe2eea57c7dc5e8804-lc.min.csswww.mcdonalds.com/etc.clientlibs/mc... https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/dynamicmedia.lc-a97e0418f0d0d6fe2eea57c7dc5e8804-lc.min.css — 200 — 669 B — 39 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-dependencies.lc-a49e169f41f57a75ecce8c10a244ff9c-lc.min.csswww.mcdonalds.com/etc.clientlibs/mc... https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-dependencies.lc-a49e169f41f57a75ecce8c10a244ff9c-lc.min.css — 200 — 1.1 KiB — 43 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global.lc-5fca98d4f23346c726db41021a9346d7-lc.min.csswww.mcdonalds.com/etc.clientlibs/mc... https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlib-site-global.lc-5fca98d4f23346c726db41021a9346d7-lc.min.css — 200 — 41.4 KiB — 60 ms — h2https://s7d1.scene7.com/is/image/mcdonalds/13.05.24_Burgers_Menu_s:menu-category?resmode=sharp2s7d1.scene7.com/is/image/mcdonalds/... https://s7d1.scene7.com/is/image/mcdonalds/13.05.24_Burgers_Menu_s:menu-category?resmode=sharp2 — 200 — 5.5 KiB — 47 ms — h2https://s7d1.scene7.com/is/image/mcdonalds/13.05.24_Rundvlees:menu-category?resmode=sharp2s7d1.scene7.com/is/image/mcdonalds/... https://s7d1.scene7.com/is/image/mcdonalds/13.05.24_Rundvlees:menu-category?resmode=sharp2 — 200 — 4.0 KiB — 56 ms — h2https://s7d1.scene7.com/is/image/mcdonalds/13.05.24_Kip:menu-category?resmode=sharp2s7d1.scene7.com/is/image/mcdonalds/... https://s7d1.scene7.com/is/image/mcdonalds/13.05.24_Kip:menu-category?resmode=sharp2 — 200 — 4.3 KiB — 16 ms — h2https://s7d1.scene7.com/is/image/mcdonalds/13.05.24_Vis:menu-category?resmode=sharp2s7d1.scene7.com/is/image/mcdonalds/... https://s7d1.scene7.com/is/image/mcdonalds/13.05.24_Vis:menu-category?resmode=sharp2 — 200 — 3.0 KiB — 26 ms — h2https://s7d1.scene7.com/is/image/mcdonalds/06.18.25_Meatless:menu-category?resmode=sharp2s7d1.scene7.com/is/image/mcdonalds/... https://s7d1.scene7.com/is/image/mcdonalds/06.18.25_Meatless:menu-category?resmode=sharp2 — 200 — 4.5 KiB — 25 ms — h2https://s.go-mpulse.net/boomerang/FYHYC-U4X46-PMZ7K-XB8KU-R9ZBHs.go-mpulse.net/boomerang/FYHYC-U4X... https://s.go-mpulse.net/boomerang/FYHYC-U4X46-PMZ7K-XB8KU-R9ZBH — 200 — 57.9 KiB — 140 ms — h2https://www.mcdonalds.com/libs/dam/components/scene7/common/clientlibs/viewer.lc-286d51076949b1908ec34d18f81e6977-lc.min.jswww.mcdonalds.com/libs/dam/componen... https://www.mcdonalds.com/libs/dam/components/scene7/common/clientlibs/viewer.lc-286d51076949b1908ec34d18f81e6977-lc.min.js — 200 — 1.0 KiB — 53 ms — h2https://www.mcdonalds.com/etc.clientlibs/mcdonalds/clientlibs/clientlibs-jquery-upgrade.lc-d7b1e75865cff046eb51cb2bcb68f114-lc.min.jswww.mcdonalds.com/etc.clientlibs/mc... 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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 1794ms · 1161KB · €19/mo
OneTrust
Consent
Essential
Execution 395ms
Transfer 669 KB
Monthly Cost €4/mo
www.mcdonalds.com
Other
Costly
Execution 314ms
Transfer 1 KB
Unused 21%
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 229ms
Transfer 0 KB
Monthly Cost €2/mo
www.mcdonalds.com
Other
Costly
Execution 218ms
Transfer 24 KB
Monthly Cost €2/mo
www.mcdonalds.com
Other
Costly
Execution 216ms
Transfer 281 KB
Unused 88%
Monthly Cost €2/mo
assets.adobedtm.com
Other
Optional
Execution 155ms
Transfer 38 KB
Monthly Cost €2/mo
OneTrust
Consent
Essential
Execution 123ms
Transfer 119 KB
Unused 53%
Monthly Cost €1/mo
www.mcdonalds.com
Other
Optional
Execution 74ms
Transfer 20 KB
Monthly Cost €1/mo
www.mcdonalds.com
Other
Optional
Execution 68ms
Transfer 9 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.mcdonalds.com adds 314ms and costs ~€3/month
  • Unattributable adds 229ms and costs ~€2/month
  • www.mcdonalds.com adds 218ms and costs ~€2/month
  • www.mcdonalds.com adds 216ms 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.mcdonalds.com 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

Unattributable takes 229ms 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.mcdonalds.com takes 218ms 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.mcdonalds.com takes 216ms 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

88% of www.mcdonalds.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

53% of OneTrust's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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