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https://mastercard.us

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
67
GRADE
D
FIX
6
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
46
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
87
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.
82
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.

951 ms

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

31.20 s

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

410 ms

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

0.013

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

10.87 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.

32.20 s

Page Load Progression

714 ms
1.4 s
2.1 s
2.9 s
3.6 s
4.3 s
5.0 s
5.7 s
Checks
15
5 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
74.5 MB transferred, 91 requests
FIX
74.5 MB transferred, 91 requests
Critical::
Page weighs 79.6 MB (74.5 MB transferred)
Warning::
Images are 48.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 48.3 MB
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
Fonts are 232 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 232 KB
Info::
91 HTTP requests
Info::
Estimated 15.6 g CO2 per page load
74.5 MB / 2.4 MB budget
74.5 MB transferred
91 requests
15.6 g CO2 per page load
Images 48.3 MiB 65%
Other 24.4 MiB 33%
JavaScript 1.3 MiB 2%
Fonts 232.4 KiB 0%
CSS 149.5 KiB 0%
Other 56.6 KiB 0%
HTML 25.5 KiB 0%
Other 8.3 KiB 0%
Other 2.0 KiB 0%
Other 912 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

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 (74.5 MiB of 74.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3096ms total JS execution
FIX
3096ms total JS execution
Warning::
Unattributable: 735ms CPU time
Warning::
https://www.mastercard.com/etc.clientlibs/marts/cl...: 637ms CPU time
Warning::
https://www.mastercard.com/us/en.html: 408ms CPU time
Warning::
https://asset.forms.mastercard.com/forms-ui@v2.0.8...: 402ms CPU time
Warning::
https://www.mastercard.com/rysmLZ/l7F/tV8/4hUmLK2S...: 336ms CPU time
Warning::
Third-party scripts: 3096ms (100% of total)

Main Thread Breakdown

Script Evaluation 45% Other 29% Style & Layout 14% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
Unattributable735ms74ms0ms3rd
https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site.lc-ca8f99be5b638982eeb3847c915e0cfa-lc.min.js637ms289ms90ms3rd
https://www.mastercard.com/us/en.html408ms4ms1ms3rd
https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-ZQiyzviC.js402ms370ms0ms3rd
https://www.mastercard.com/rysmLZ/l7F/tV8/4hUmLK2S/iYEYX4r97Oucr2Oz/IhkYIg/ShUxeHpN/GkkB336ms306ms22ms3rd
https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-site.lc-39e1e2e5e7bb50ebf287c0448303b970-lc.min.js274ms88ms57ms3rd
https://cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js125ms82ms21ms3rd
https://assets.adobedtm.com/acdc00762da2/83bdb98d95f8/launch-05f4b8356cc4.min.js110ms85ms21ms3rd
https://www.mastercard.com/akam/13/7ad3fecb70ms56ms2ms3rd
F
JS Bundles
Action
33 scripts, 554 KB unused
FIX
33 scripts, 554 KB unused
Warning::
https://www.mastercard.com/etc.clientlibs/marts/cl...: 228 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mastercard.com/etc.clientlibs/marts/cl...: unminified — 229 KB could be saved
Warning::
https://www.mastercard.com/etc.clientlibs/algolia/...: 188 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202604.1...: 69 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mastercard.com/rysmLZ/l7F/tV8/4hUmLK2S...: 35 KB unused (20%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.adobedtm.com/acdc00762da2/83bdb98d9...: 34 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 554 KB
554 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site.lc-ca8f99be5b638982eeb3847c915e0cfa-lc.min.js470 KB228 KB (49%)✗3rd
https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-site.lc-39e1e2e5e7bb50ebf287c0448303b970-lc.min.js255 KB188 KB (75%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js131 KB69 KB (53%)✓3rd
https://www.mastercard.com/rysmLZ/l7F/tV8/4hUmLK2S/iYEYX4r97Oucr2Oz/IhkYIg/ShUxeHpN/GkkB175 KB35 KB (20%)✓3rd
https://assets.adobedtm.com/acdc00762da2/83bdb98d95f8/launch-05f4b8356cc4.min.js89 KB34 KB (38%)✓3rd
https://www.mastercard.com/akam/13/7ad3fecb9 KB—✓3rd
https://www.mastercard.com/etc.clientlibs/clientlibs/granite/jquery/granite/csrf.lc-652a558c3774088b61b0530c184710d1-lc.min.js2 KB—✓3rd
https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-Ct6sGP3H.js1 KB—✓3rd
https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-hooksInitialization.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js0 KB—✓3rd
https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-algoliaext.lc-0874cc45a78bddbdf6a32b4cc9a1c947-lc.min.js3 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
91 resources · 74.5 MB · 554 KB savings available
FIX
91 resources · 74.5 MB · 554 KB savings available
Warning::
Page weight 73.5 MB over 1MB target
Got: 74.5 MB Expected: ≤ 1 MB
Info::
~554 KB of savings available
Warning::
90 third-party resources (100% of weight)
Info::
9 resources over 200KB
91 resources · 74.5 MiB · 90 third-party 73.5 MiB over 1MB target
Image 65% · 48.3 MiB
Media 33% · 24.4 MiB
JavaScript 2% · 1.3 MiB
Font 0% · 232.4 KiB
CSS 0% · 154.2 KiB
Other 0% · 61.1 KiB
Document 0% · 26.1 KiB

~553.7 KiB of savings available

Remove unused JavaScript: 553.7 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: max-age=0, no-cache, no-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0, no-cache, no-store

DirectiveValueMeaning
max-age0Cache for 0 seconds
no-cache—Cache but always revalidate first
no-store—Never cache this response
C
Image Optimization
Action
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
Warning::
https://www.mastercard.com/content/dam/mccom/share... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.mastercard.com/content/dam/mccom/share... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
20 images 48.3 MB
0 oversized -0 KB
8 legacy format
2 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

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

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
8 fonts (232 KB)
PASS
8 fonts (232 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

232 KB total

Render-blocking

0

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s FCP 951 ms LCP 31.2 shttps://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/Mark-For-MC/MarkForMC-Med.woff2MarkForMC-Med.woff2 https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/Mark-For-MC/MarkForMC-Med.woff2 — 36.5 KiB — 69 ms — font-display: swaphttps://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/Mark-For-MC/MarkForMC-Bold.woff2MarkForMC-Bold.woff2 https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/Mark-For-MC/MarkForMC-Bold.woff2 — 36.2 KiB — 69 ms — font-display: swaphttps://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/Mark-For-MC/MarkForMC.woff2MarkForMC.woff2 https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/Mark-For-MC/MarkForMC.woff2 — 37.0 KiB — 67 ms — font-display: swaphttps://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/mccom-icons/mccom-icons.ttf?52b978754a296525af296243cf902792mccom-icons.ttf https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/mccom-icons/mccom-icons.ttf?52b978754a296525af296243cf902792 — 7.1 KiB — 64 ms — font-display: swaphttps://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC.woff2MarkForMC.woff2 https://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC.woff2 — 37.2 KiB — 33 ms — font-display: swaphttps://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC-Med.woff2MarkForMC-Med.woff2 https://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC-Med.woff2 — 36.7 KiB — 62 ms — font-display: swaphttps://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC-Bold.woff2MarkForMC-Bold.woff2 https://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC-Bold.woff2 — 36.5 KiB — 65 ms — font-display: swapdata:application/font-woff;charset=utf-8;base64,d09GRgABAAAAABUgAAsAAAAAItAAAQAAAAAAAAAAAAAAAAAAAAA…font-woff;charset=utf-8... data:application/font-woff;charset=utf-8;base64,d09GRgABAAAAABUgAAsAAAAAItAAAQAAAAAAAAAAAAAAAAAAAAA… — 5.3 KiB — 216 ms — font-display: swap
MarkForMC-Med.woff2 woff2 swap
Size 37 KB
Load time 69 ms
Start 462 ms
Risk FOUT — text flashes from fallback to web font
MarkForMC-Bold.woff2 woff2 swap
Size 36 KB
Load time 69 ms
Start 462 ms
Risk FOUT — text flashes from fallback to web font
MarkForMC.woff2 woff2 swap
Size 37 KB
Load time 67 ms
Start 465 ms
Risk FOUT — text flashes from fallback to web font
mccom-icons.ttf ttf swap
Size 7 KB
Load time 64 ms
Start 465 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
MarkForMC.woff2 woff2 swap
Size 37 KB
Load time 33 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
MarkForMC-Med.woff2 woff2 swap
Size 37 KB
Load time 62 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
MarkForMC-Bold.woff2 woff2 swap
Size 36 KB
Load time 65 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
font-woff;charset=utf-8... woff swap
Size 5 KB
Load time 216 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~4 KB and ~8 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
91 requests over 4213ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s FCP 951 ms LCP 31.2 shttps://mastercard.us// https://mastercard.us/ — 301 — 1.1 KiB — 24 ms — h2https://www.mastercard.com/us/en.htmlwww.mastercard.com/us/en.html https://www.mastercard.com/us/en.html — 200 — 25.5 KiB — 56 ms — h2https://www.mastercard.com/.rum/@adobe/helix-rum-js@%5E2/dist/micro.jswww.mastercard.com/.rum/@adobe/heli... https://www.mastercard.com/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js — 200 — 1.0 KiB — 82 ms — h2https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-base.lc-c5165be5c7cf8eee0f5b6428a836d088-lc.min.csswww.mastercard.com/etc.clientlibs/m... https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-base.lc-c5165be5c7cf8eee0f5b6428a836d088-lc.min.css — 200 — 2.3 KiB — 25 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/forms-ui.cssasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/forms-ui.css — 200 — 18.6 KiB — 47 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/theme.cssasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/theme.css — 200 — 6.0 KiB — 36 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/forms-ui.esm.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/forms-ui.esm.js — 200 — 1.8 KiB — 42 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/forms-ui-analytics.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/forms-ui-analytics.js — 200 — 910 B — 37 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/forms-ui-localStorage.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/forms-ui-localStorage.js — 200 — 1.2 KiB — 39 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 43 ms — h2https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.jswww.mastercard.com/etc.clientlibs/m... https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js — 200 — 358 B — 69 ms — h2https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.csswww.mastercard.com/etc.clientlibs/m... https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css — 200 — 347 B — 45 ms — h2https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-hooksInitialization.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.csswww.mastercard.com/etc.clientlibs/a... https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-hooksInitialization.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css — 200 — 348 B — 47 ms — h2https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-algoliaext.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.csswww.mastercard.com/etc.clientlibs/m... https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-algoliaext.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css — 200 — 347 B — 49 ms — h2https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-site.lc-9d117ada9da45246db1edb3ead027265-lc.min.csswww.mastercard.com/etc.clientlibs/a... https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-site.lc-9d117ada9da45246db1edb3ead027265-lc.min.css — 200 — 19.1 KiB — 56 ms — h2https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site.lc-bf9c327f30ca5f4fdfb20355f6a65cef-lc.min.csswww.mastercard.com/etc.clientlibs/m... https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site.lc-bf9c327f30ca5f4fdfb20355f6a65cef-lc.min.css — 200 — 100.9 KiB — 85 ms — h2https://www.mastercard.com/etc.clientlibs/core/wcm/components/page/v2/page/clientlibs/site/skiptomaincontent.lc-696ce9a06faa733b225ffb8c05f16db9-lc.min.csswww.mastercard.com/etc.clientlibs/c... https://www.mastercard.com/etc.clientlibs/core/wcm/components/page/v2/page/clientlibs/site/skiptomaincontent.lc-696ce9a06faa733b225ffb8c05f16db9-lc.min.css — 200 — 586 B — 64 ms — h2https://www.mastercard.com/content/dam/mccom/shared/header/ma_symbol.svgwww.mastercard.com/content/dam/mcco... https://www.mastercard.com/content/dam/mccom/shared/header/ma_symbol.svg — 200 — 910 B — 68 ms — h2https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--c471b0a1-c241-4d00-ac1d-2b2451510e91/br45724-mastercard-websiteimageryrefresh-solutions-1-1x1-ezgif-com-loop-count.gif?quality=82&preferwebp=truewww.mastercard.com/adobe/dynamicmed... 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h2https://www.mastercard.com/content/dam/mccom/shared/homepage/images/messi-mastercard-video-poster.jpgwww.mastercard.com/content/dam/mcco... https://www.mastercard.com/content/dam/mccom/shared/homepage/images/messi-mastercard-video-poster.jpg — 200 — 218.4 KiB — 37 ms — h2https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-hooksInitialization.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.jswww.mastercard.com/etc.clientlibs/a... https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-hooksInitialization.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js — 200 — 357 B — 33 ms — h2https://geolocation.onetrust.com/cookieconsentpub/v1/geo/locationgeolocation.onetrust.com/cookiecons... https://geolocation.onetrust.com/cookieconsentpub/v1/geo/location — 200 — 288 B — 41 ms — h2https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-algoliaext.lc-0874cc45a78bddbdf6a32b4cc9a1c947-lc.min.jswww.mastercard.com/etc.clientlibs/m... 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https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-e5ee2f6d.entry.js — 200 — 7.5 KiB — 9 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-c1322c8f.entry.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-c1322c8f.entry.js — 200 — 7.4 KiB — 10 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAACWCAYAAABkW7XSAAAQAElEQVR4AeycCZhUxbXHT3UPMwg4q…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAACWCAYAAABkW7XSAAAQAElEQVR4AeycCZhUxbXHT3UPMwg4q… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAACGFjVEwAAAABAAAAAcMq2TYAAAANS…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAACGFjVEwAAAABAAAAAcMq2TYAAAANS… — 200 — 0 B — 0 ms — datadata:application/font-woff;charset=utf-8;base64,d09GRgABAAAAABUgAAsAAAAAItAAAQAAAAAAAAAAAAAAAAAAAAA…data:application/font-woff;charset=... 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h2https://assets.adobedtm.com/acdc00762da2/83bdb98d95f8/b1ccace159e9/RCe48227830aa142f4a82079ac1bb152fc-source.min.jsassets.adobedtm.com/acdc00762da2/83... https://assets.adobedtm.com/acdc00762da2/83bdb98d95f8/b1ccace159e9/RCe48227830aa142f4a82079ac1bb152fc-source.min.js — 200 — 763 B — 5 ms — h2https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/icons/mastercard-favicon.svgwww.mastercard.com/etc.clientlibs/m... https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/icons/mastercard-favicon.svg — 200 — 920 B — 27 ms — h2https://www.mastercard.com/rysmLZ/l7F/tV8/4hUmLK2S/iYEYX4r97Oucr2Oz/IhkYIg/ShUxeHpN/GkkBwww.mastercard.com/rysmLZ/l7F/tV8/4... https://www.mastercard.com/rysmLZ/l7F/tV8/4hUmLK2S/iYEYX4r97Oucr2Oz/IhkYIg/ShUxeHpN/GkkB — 201 — 1.0 KiB — 201 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 3096ms · 1007KB · $41/mo
Unattributable
Other
Costly
Execution 735ms
Transfer 0 KB
Monthly Cost $10/mo
www.mastercard.com
Other
Costly
Execution 637ms
Transfer 470 KB
Unused 49%
Monthly Cost $8/mo
www.mastercard.com
Other
Costly
Execution 408ms
Transfer 25 KB
Monthly Cost $5/mo
asset.forms.mastercard.com
Other
Costly
Execution 402ms
Transfer 26 KB
Monthly Cost $5/mo
www.mastercard.com
Other
Costly
Execution 336ms
Transfer 1 KB
Unused 20%
Monthly Cost $4/mo
www.mastercard.com
Other
Costly
Execution 274ms
Transfer 255 KB
Unused 75%
Monthly Cost $4/mo
OneTrust
Consent
Essential
Execution 125ms
Transfer 131 KB
Unused 53%
Monthly Cost $2/mo
assets.adobedtm.com
Other
Optional
Execution 110ms
Transfer 89 KB
Unused 38%
Monthly Cost $1/mo
www.mastercard.com
Other
Optional
Execution 70ms
Transfer 9 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 735ms and costs ~$10/month
  • www.mastercard.com adds 637ms and costs ~$8/month
  • www.mastercard.com adds 408ms and costs ~$5/month
  • asset.forms.mastercard.com adds 402ms and costs ~$5/month
  • www.mastercard.com adds 336ms and costs ~$4/month
  • www.mastercard.com adds 274ms and costs ~$4/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

Unattributable takes 735ms 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.mastercard.com takes 637ms 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.mastercard.com takes 408ms 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

asset.forms.mastercard.com takes 402ms 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.mastercard.com takes 336ms 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.mastercard.com takes 274ms 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

75% of www.mastercard.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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