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https://michelin.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
9
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.
100
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.

5.46 s

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

12.87 s

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

1.65 s

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

0.651

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

6.95 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.

12.98 s

Page Load Progression

390 ms
781 ms
1.2 s
1.6 s
2.0 s
2.3 s
2.7 s
3.1 s
Checks
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
10.0 MB transferred, 89 requests
FIX
10.0 MB transferred, 89 requests
Critical::
Page weighs 13.0 MB (10.0 MB transferred)
Info::
Fonts are 397 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 397 KB
Info::
89 HTTP requests
Info::
Estimated 2.1 g CO2 per page load
10.0 MB / 2.4 MB budget
10.0 MB transferred
89 requests
2.1 g CO2 per page load
Other 8.1 MiB 81%
Images 481.8 KiB 5%
Fonts 396.9 KiB 4%
Other 387.4 KiB 4%
JavaScript 367.3 KiB 4%
HTML 249.8 KiB 2%
CSS 80.6 KiB 1%
Other 437 B 0%
Other 328 B 0%
Other 281 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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 (10.0 MiB of 10.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
8879ms total JS execution
FIX
8879ms total JS execution
Warning::
https://agngnconpm.cloudimg.io/v7/https://dgaddcos...: 2802ms CPU time
Warning::
Unattributable: 1933ms CPU time
Warning::
https://www.michelin.com/: 1917ms CPU time
Warning::
https://cdn.mouseflow.com/projects/65b8ae16-3be0-4...: 1497ms CPU time
Warning::
https://sdk.privacy-center.org/sdk/22ecd6bfac93de6...: 284ms CPU time
Warning::
Third-party scripts: 8879ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 29% Style & Layout 12% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/runtime.M_XNRUEv.js2802ms2642ms0ms3rd
Unattributable1933ms68ms0ms3rd
https://www.michelin.com/1917ms86ms7ms3rd
https://cdn.mouseflow.com/projects/65b8ae16-3be0-4492-9253-16bb4ccc8184.js1497ms1245ms23ms3rd
https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js284ms229ms54ms3rd
https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-en-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js202ms118ms35ms3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/window.UbV9A-6p.js174ms118ms1ms3rd
https://tag.aticdn.net/piano-analytics.js71ms58ms12ms3rd
D
Page Weight Inventory
Action
89 resources · 10.0 MB · 75 KB savings available
FIX
89 resources · 10.0 MB · 75 KB savings available
Warning::
Page weight 9.0 MB over 1MB target
Got: 10.0 MB Expected: ≤ 1 MB
Info::
~75 KB of savings available
Warning::
88 third-party resources (100% of weight)
Info::
5 resources over 200KB
89 resources · 10.0 MiB · 88 third-party 9.0 MiB over 1MB target
Media 81% · 8.1 MiB
Image 8% · 869.1 KiB
Font 4% · 396.9 KiB
JavaScript 4% · 367.3 KiB
Document 2% · 249.8 KiB
CSS 1% · 80.6 KiB
Other 0% · 1.2 KiB

~74.9 KiB of savings available

Remove unused JavaScript: 74.9 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.

B
Image Optimization
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Warning::
https://agngnconpm.cloudimg.io/v7/https://dgaddcos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://agngnconpm.cloudimg.io/v7/https://dgaddcos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
8 images 482 KB
0 oversized -0 KB
3 legacy format
3 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

Performance issues directly impact user engagement and conversion rates.

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
60 scripts, 75 KB unused
REVIEW
60 scripts, 75 KB unused
Warning::
https://sdk.privacy-center.org/sdk/22ecd6bfac93de6...: 54 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.mouseflow.com/projects/65b8ae16-3be0-4...: 21 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 75 KB
75 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js101 KB54 KB (53%)✓3rd
https://cdn.mouseflow.com/projects/65b8ae16-3be0-4492-9253-16bb4ccc8184.js53 KB21 KB (41%)✓3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/ClientRouter.astro_astro_type_script_index_0_lang.DZnDNxNb.js6 KB—✓3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/PianoAnalytics.BLMC10ki.js2 KB—✓3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/client.svelte.DGfBtKQc.js1 KB—✓3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/legacy.QxIWGC4C.js1 KB—✓3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/index-client.CNwuEL72.js1 KB—✓3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/runtime.M_XNRUEv.js9 KB—✓3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/lifecycle.C9HdC8AO.js1 KB—✓3rd
https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/props.CuL19VXw.js2 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

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
4 fonts (397 KB)
PASS
4 fonts (397 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

397 KB total

Render-blocking

0

of 4

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 5.5 s LCP 12.9 shttps://www.michelin.com/public/themes/michelin-corporate/assets/fonts/NotoSans/NotoSans.woff2NotoSans.woff2 https://www.michelin.com/public/themes/michelin-corporate/assets/fonts/NotoSans/NotoSans.woff2 — 160.7 KiB — 361 ms — font-display: swaphttps://www.michelin.com/public/themes/michelin-corporate/assets/fonts/MichelinUnitTitling/MichelinUnitTitling-Bold.woff2MichelinUnitTitling-Bol... https://www.michelin.com/public/themes/michelin-corporate/assets/fonts/MichelinUnitTitling/MichelinUnitTitling-Bold.woff2 — 38.8 KiB — 184 ms — font-display: swaphttps://www.michelin.com/public/themes/michelin-corporate/assets/fonts/NotoSans/NotoSans-Bold.woff2NotoSans-Bold.woff2 https://www.michelin.com/public/themes/michelin-corporate/assets/fonts/NotoSans/NotoSans-Bold.woff2 — 159.7 KiB — 310 ms — font-display: swaphttps://www.michelin.com/public/themes/michelin-corporate/assets/fonts/MichelinUnitTitling/MichelinUnitTitling-Regular.woff2MichelinUnitTitling-Reg... https://www.michelin.com/public/themes/michelin-corporate/assets/fonts/MichelinUnitTitling/MichelinUnitTitling-Regular.woff2 — 37.7 KiB — 191 ms — font-display: swap
NotoSans.woff2 woff2 swap
Size 161 KB
Load time 361 ms
Start 1.6 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
MichelinUnitTitling-Bol... woff2 swap
Size 39 KB
Load time 184 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
NotoSans-Bold.woff2 woff2 swap
Size 160 KB
Load time 310 ms
Start 1.6 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
MichelinUnitTitling-Reg... woff2 swap
Size 38 KB
Load time 191 ms
Start 1.6 s
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 ~160 KB and ~320 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
89 requests over 6849ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 5.5 s LCP 12.9 shttps://michelin.com// https://michelin.com/ — 301 — 146 B — 515 ms — h2https://www.michelin.com/www.michelin.com/ https://www.michelin.com/ — 200 — 249.8 KiB — 530 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/ClientRouter.astro_astro_type_script_index_0_lang.DZnDNxNb.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/ClientRouter.astro_astro_type_script_index_0_lang.DZnDNxNb.js — 200 — 5.8 KiB — 121 ms — h2https://www.michelin.com/public/core.csswww.michelin.com/public/core.css https://www.michelin.com/public/core.css — 200 — 32.7 KiB — 429 ms — h2https://www.michelin.com/public/themes/michelin-corporate/theme-michelin-corporate.csswww.michelin.com/public/themes/mich... https://www.michelin.com/public/themes/michelin-corporate/theme-michelin-corporate.css — 200 — 33.1 KiB — 301 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/_slug_json.DD53KW_D.cssagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/_slug_json.DD53KW_D.css — 200 — 5.8 KiB — 137 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/_slug_json.Wa11T0Nl.cssagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/_slug_json.Wa11T0Nl.css — 200 — 9.0 KiB — 139 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/dhghtmmbaynh5byopczs1wqu-couverture-urd-2025.full.jpgagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/dhghtmmbaynh5byopczs1wqu-couverture-urd-2025.full.jpg — 200 — 34.3 KiB — 326 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/cllngd0on4c280thpbrji9wtm-cp-gm-2019-1600x790.full.jpgagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/cllngd0on4c280thpbrji9wtm-cp-gm-2019-1600x790.full.jpg — 200 — 8.0 KiB — 124 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/y96dca017r18ipsjiggodzad-michelin-dassault-innovations.0.208.2000.1125.full.jpgagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/y96dca017r18ipsjiggodzad-michelin-dassault-innovations.0.208.2000.1125.full.jpg — 200 — 38.7 KiB — 125 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/PianoAnalytics.BLMC10ki.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/PianoAnalytics.BLMC10ki.js — 200 — 2.2 KiB — 111 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/client.svelte.DGfBtKQc.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/client.svelte.DGfBtKQc.js — 200 — 1.4 KiB — 112 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/u784b9xc3w6qi6tpftre6mh1-roue-lunaire-flancs.full.jpgagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/u784b9xc3w6qi6tpftre6mh1-roue-lunaire-flancs.full.jpg — 200 — 119.7 KiB — 83 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/legacy.QxIWGC4C.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/legacy.QxIWGC4C.js — 200 — 954 B — 24 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/index-client.CNwuEL72.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/index-client.CNwuEL72.js — 200 — 1.2 KiB — 24 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/runtime.M_XNRUEv.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/runtime.M_XNRUEv.js — 200 — 9.3 KiB — 23 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/lifecycle.C9HdC8AO.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/lifecycle.C9HdC8AO.js — 200 — 1.1 KiB — 23 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/props.CuL19VXw.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/props.CuL19VXw.js — 200 — 2.4 KiB — 23 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/render.BMiX9gf6.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/render.BMiX9gf6.js — 200 — 2.9 KiB — 23 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/template.BA555WtI.jsagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/astro/v2.18.0/_astro/template.BA555WtI.js — 200 — 1.4 KiB — 23 ms — h2https://tag.aticdn.net/piano-analytics.jstag.aticdn.net/piano-analytics.js https://tag.aticdn.net/piano-analytics.js — 200 — 27.8 KiB — 14 ms — h2https://phmgxnk.pa-cd.com/event?s=596828&idclient=mo949x5gsml8mvlvphmgxnk.pa-cd.com/event?s=596828&id... https://phmgxnk.pa-cd.com/event?s=596828&idclient=mo949x5gsml8mvlv — 204 — 328 B — 117 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h2https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.jssdk.privacy-center.org/sdk/22ecd6bf... https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js — 200 — 100.9 KiB — 388 ms — h2https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/cltejrqo80dli13lhfq1j0adf-muted-homevideo.mp4agngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/cxf-corporate/attachments/cltejrqo80dli13lhfq1j0adf-muted-homevideo.mp4 — 206 — 3.7 MiB — 336 ms — h3https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-en-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.jssdk.privacy-center.org/sdk/22ecd6bf... https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-en-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js — 200 — 52.8 KiB — 321 ms — h3https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/corporate-production/attachments/cltemo1960jue13j9eqlyfshy-michelin-logo.svgagngnconpm.cloudimg.io/v7/https://d... https://agngnconpm.cloudimg.io/v7/https://dgaddcosprod.blob.core.windows.net/corporate-production/attachments/cltemo1960jue13j9eqlyfshy-michelin-logo.svg — 200 — 7.8 KiB — 6 ms — h3https://www.michelin.com/favicon.icowww.michelin.com/favicon.ico https://www.michelin.com/favicon.ico — 200 — 4.5 KiB — 304 ms — h2https://eu01.rec.mouseflow.com/html?website=65b8ae16-3be0-4492-9253-16bb4ccc8184&session=3426304650e7c15b4c7624c3cc46c208&page=04212312bd13a705a05864afbc0e1f36f4d3feb9&gz=1eu01.rec.mouseflow.com/html?website... 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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 8879ms · 494KB · €96/mo
agngnconpm.cloudimg.io
Other
Costly
Execution 2802ms
Transfer 9 KB
Monthly Cost €30/mo
Unattributable
Other
Costly
Execution 1933ms
Transfer 0 KB
Monthly Cost €21/mo
www.michelin.com
Other
Costly
Execution 1917ms
Transfer 250 KB
Monthly Cost €21/mo
cdn.mouseflow.com
Other
Costly
Execution 1497ms
Transfer 53 KB
Unused 41%
Monthly Cost €16/mo
sdk.privacy-center.org
Other
Costly
Execution 284ms
Transfer 101 KB
Unused 53%
Monthly Cost €3/mo
sdk.privacy-center.org
Other
Costly
Execution 202ms
Transfer 53 KB
Monthly Cost €2/mo
agngnconpm.cloudimg.io
Other
Optional
Execution 174ms
Transfer 0 KB
Monthly Cost €2/mo
tag.aticdn.net
Other
Optional
Execution 71ms
Transfer 28 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • agngnconpm.cloudimg.io adds 2802ms and costs ~€30/month
  • Unattributable adds 1933ms and costs ~€21/month
  • www.michelin.com adds 1917ms and costs ~€21/month
  • cdn.mouseflow.com adds 1497ms and costs ~€16/month
  • sdk.privacy-center.org adds 284ms and costs ~€3/month
  • sdk.privacy-center.org adds 202ms 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

agngnconpm.cloudimg.io takes 2802ms 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 1933ms 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.michelin.com takes 1917ms 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

cdn.mouseflow.com takes 1497ms 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

sdk.privacy-center.org takes 284ms 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

53% of sdk.privacy-center.org'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

sdk.privacy-center.org takes 202ms 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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