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https://mastercard.com

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
57
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.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.21 s

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

31.43 s

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

188 ms

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

0.011

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

11.36 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.

32.40 s

Page Load Progression

627 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 2 REVIEW 6 FIX
F
Page Weight Budget
Action
95.8 MB transferred, 93 requests
FIX
95.8 MB transferred, 93 requests
Critical::
Page weighs 100.9 MB (95.8 MB transferred)
Warning::
Images are 70.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 70.8 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 230 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 230 KB
Info::
93 HTTP requests
Info::
Estimated 20.1 g CO2 per page load
95.8 MB / 2.4 MB budget
95.8 MB transferred
93 requests
20.1 g CO2 per page load
Images 70.8 MiB 74%
Other 23.3 MiB 24%
JavaScript 1.3 MiB 1%
Fonts 230.5 KiB 0%
CSS 149.5 KiB 0%
Other 54.4 KiB 0%
HTML 25.5 KiB 0%
Other 6.9 KiB 0%
Other 2.5 KiB 0%
Other 913 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 (95.8 MiB of 95.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2095ms total JS execution
FIX
2095ms total JS execution
Warning::
https://www.mastercard.com/etc.clientlibs/marts/cl...: 542ms CPU time
Warning::
Unattributable: 484ms CPU time
Warning::
https://www.mastercard.com/es/es.html: 290ms CPU time
Warning::
https://www.mastercard.com/TnsrgkIl6xzrl/kX6HU8ZlU...: 280ms CPU time
Info::
https://asset.forms.mastercard.com/forms-ui@v2.0.8...: 155ms CPU time
Warning::
Third-party scripts: 2095ms (100% of total)

Main Thread Breakdown

Script Evaluation 41% Other 31% Style & Layout 15% Script Parsing & Compilation 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site.lc-ca8f99be5b638982eeb3847c915e0cfa-lc.min.js542ms186ms58ms3rd
Unattributable484ms43ms0ms3rd
https://www.mastercard.com/es/es.html290ms5ms1ms3rd
https://www.mastercard.com/TnsrgkIl6xzrl/kX6HU8ZlUqt-/8U/1hEiXpimSOi3NL/YG9R/Iyp0ZU8/oZHEB280ms262ms12ms3rd
https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-ZQiyzviC.js155ms141ms0ms3rd
https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-site.lc-39e1e2e5e7bb50ebf287c0448303b970-lc.min.js148ms47ms28ms3rd
https://cdn.cookielaw.org/scripttemplates/202510.1.0/otBannerSdk.js82ms57ms12ms3rd
https://assets.adobedtm.com/acdc00762da2/83bdb98d95f8/launch-05f4b8356cc4.min.js62ms49ms8ms3rd
https://www.mastercard.com/akam/13/7cc499b453ms34ms1ms3rd
F
JS Bundles
Action
33 scripts, 550 KB unused
FIX
33 scripts, 550 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/202510.1...: 64 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mastercard.com/TnsrgkIl6xzrl/kX6HU8ZlU...: 36 KB unused (21%)
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: 550 KB
550 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/202510.1.0/otBannerSdk.js123 KB64 KB (52%)✓3rd
https://www.mastercard.com/TnsrgkIl6xzrl/kX6HU8ZlUqt-/8U/1hEiXpimSOi3NL/YG9R/Iyp0ZU8/oZHEB175 KB36 KB (21%)✓3rd
https://assets.adobedtm.com/acdc00762da2/83bdb98d95f8/launch-05f4b8356cc4.min.js89 KB34 KB (38%)✓3rd
https://www.mastercard.com/akam/13/7cc499b49 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
93 resources · 95.8 MB · 550 KB savings available
FIX
93 resources · 95.8 MB · 550 KB savings available
Warning::
Page weight 94.8 MB over 1MB target
Got: 95.8 MB Expected: ≤ 1 MB
Info::
~550 KB of savings available
Warning::
92 third-party resources (100% of weight)
Info::
9 resources over 200KB
93 resources · 95.8 MiB · 92 third-party 94.8 MiB over 1MB target
Image 74% · 70.8 MiB
Media 24% · 23.3 MiB
JavaScript 1% · 1.3 MiB
Font 0% · 230.5 KiB
CSS 0% · 154.0 KiB
Other 0% · 57.5 KiB
Document 0% · 26.6 KiB

~550.2 KiB of savings available

Remove unused JavaScript: 550.2 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
19 images, 0 KB saveable
REVIEW
19 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.
19 images 70.8 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 (230 KB)
PASS
8 fonts (230 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

230 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 1.2 s LCP 31.4 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 — 36.0 KiB — 42 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 — 35.7 KiB — 43 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 — 6.6 KiB — 40 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 — 36.5 KiB — 43 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 — 21 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 — 32 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 — 40 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 — 64 ms — font-display: swap
MarkForMC-Med.woff2 woff2 swap
Size 36 KB
Load time 42 ms
Start 738 ms
Risk FOUT — text flashes from fallback to web font
MarkForMC-Bold.woff2 woff2 swap
Size 36 KB
Load time 43 ms
Start 739 ms
Risk FOUT — text flashes from fallback to web font
mccom-icons.ttf ttf swap
Size 7 KB
Load time 40 ms
Start 739 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
MarkForMC.woff2 woff2 swap
Size 36 KB
Load time 43 ms
Start 739 ms
Risk FOUT — text flashes from fallback to web font
MarkForMC.woff2 woff2 swap
Size 37 KB
Load time 21 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
MarkForMC-Med.woff2 woff2 swap
Size 37 KB
Load time 32 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
MarkForMC-Bold.woff2 woff2 swap
Size 36 KB
Load time 40 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
font-woff;charset=utf-8... woff swap
Size 5 KB
Load time 64 ms
Start 1.4 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
93 requests over 3090ms
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 1.2 s LCP 31.4 shttps://mastercard.com// https://mastercard.com/ — 301 — 579 B — 379 ms — http/1.1https://www.mastercard.com/www.mastercard.com/ https://www.mastercard.com/ — 301 — 1.0 KiB — 52 ms — h2http://www.mastercard.com/es/es.htmlwww.mastercard.com/es/es.html http://www.mastercard.com/es/es.html — 307 — 0 B — 0 ms — http/1.1https://www.mastercard.com/es/es.htmlwww.mastercard.com/es/es.html https://www.mastercard.com/es/es.html — 200 — 25.5 KiB — 26 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 — 44 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 — 24 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 — 69 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 — 68 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 — 78 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 — 913 B — 74 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 — 75 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 94 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 — 38 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 — 43 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 — 347 B — 45 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 — 346 B — 46 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 — 50 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 — 67 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 — 585 B — 58 ms — h2https://www.mastercard.com/content/dam/mccom/shared/header/ma_symbol.svgwww.mastercard.com/content/dam/mcco... 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h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-e5ee2f6d.entry.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-e5ee2f6d.entry.js — 200 — 7.5 KiB — 7 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 — 6 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=... data:application/font-woff;charset=utf-8;base64,d09GRgABAAAAABUgAAsAAAAAItAAAQAAAAAAAAAAAAAAAAAAAAA… — 200 — 5.3 KiB — 64 ms — datahttps://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--09049c89-e3c2-45bb-9035-84304b488236/br45724-mastercard-websiteimageryrefresh-carousel-2-business-16x91-ezgif-com-loop-count.gif?preferwebp=true&quality=82www.mastercard.com/adobe/dynamicmed... https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--09049c89-e3c2-45bb-9035-84304b488236/br45724-mastercard-websiteimageryrefresh-carousel-2-business-16x91-ezgif-com-loop-count.gif?preferwebp=true&quality=82 — 200 — 23.4 MiB — 1.0 s — h2https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--d732ff4c-1daf-4a59-a52b-3b32dc2c5e86/young-startup-coffee-cafe-owner-open-and-welcome.jpg?preferwebp=true&quality=82www.mastercard.com/adobe/dynamicmed... https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--d732ff4c-1daf-4a59-a52b-3b32dc2c5e86/young-startup-coffee-cafe-owner-open-and-welcome.jpg?preferwebp=true&quality=82 — 200 — 38.6 KiB — 83 ms — h2https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--31deb226-0992-429e-8fae-9bccb16fc665/br45724-mastercard-websiteimageryrefresh-solutions-4-1x1.jpg?preferwebp=true&quality=82www.mastercard.com/adobe/dynamicmed... https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--31deb226-0992-429e-8fae-9bccb16fc665/br45724-mastercard-websiteimageryrefresh-solutions-4-1x1.jpg?preferwebp=true&quality=82 — 200 — 48.7 KiB — 113 ms — h2https://asset.mastercard.com/content/dam/dxp/dxp-faas/assets/translations/es-ES.jsonasset.mastercard.com/content/dam/dx... https://asset.mastercard.com/content/dam/dxp/dxp-faas/assets/translations/es-ES.json — 200 — 2.4 KiB — 85 ms — h2https://www.mastercard.com/content/dam/mccom/common/CaptionNotNeeded.vttwww.mastercard.com/content/dam/mcco... https://www.mastercard.com/content/dam/mccom/common/CaptionNotNeeded.vtt — 200 — 438 B — 434 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-BnD91lSb.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-BnD91lSb.js — 200 — 1.5 KiB — 11 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-C3vcEZdJ.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-C3vcEZdJ.js — 200 — 40.4 KiB — 29 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-4OhmcLQX.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-4OhmcLQX.js — 200 — 2.9 KiB — 18 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-B85MJLTf.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-B85MJLTf.js — 200 — 564 B — 14 ms — h2https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-CqdmgBk0.jsasset.forms.mastercard.com/forms-ui... https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-CqdmgBk0.js — 200 — 3.4 KiB — 24 ms — h2https://www.mastercard.com/content/dam/mccom/shared/homepage/videos/translated-welcome-videos/homepage-video-es-ES%20_16x9_.mp4www.mastercard.com/content/dam/mcco... https://www.mastercard.com/content/dam/mccom/shared/homepage/videos/translated-welcome-videos/homepage-video-es-ES%20_16x9_.mp4 — 206 — 23.3 MiB — 1.6 s — h2https://cdn.cookielaw.org/consent/01992db1-add3-7a24-a869-afc1e6555f17/0199297b-f4f7-7204-bde5-f87a8ac2909a/es-es.jsoncdn.cookielaw.org/consent/01992db1-... https://cdn.cookielaw.org/consent/01992db1-add3-7a24-a869-afc1e6555f17/0199297b-f4f7-7204-bde5-f87a8ac2909a/es-es.json — 200 — 30.2 KiB — 43 ms — h2https://www.mastercard.com/akam/13/pixel_7cc499b4www.mastercard.com/akam/13/pixel_7c... https://www.mastercard.com/akam/13/pixel_7cc499b4 — 200 — 612 B — 27 ms — 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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 2095ms · 999KB · $28/mo
www.mastercard.com
Other
Costly
Execution 542ms
Transfer 470 KB
Unused 49%
Monthly Cost $7/mo
Unattributable
Other
Costly
Execution 484ms
Transfer 0 KB
Monthly Cost $6/mo
www.mastercard.com
Other
Costly
Execution 290ms
Transfer 25 KB
Monthly Cost $4/mo
www.mastercard.com
Other
Costly
Execution 280ms
Transfer 1 KB
Unused 21%
Monthly Cost $4/mo
asset.forms.mastercard.com
Other
Optional
Execution 155ms
Transfer 26 KB
Monthly Cost $2/mo
www.mastercard.com
Other
Optional
Execution 148ms
Transfer 255 KB
Unused 75%
Monthly Cost $2/mo
OneTrust
Consent
Essential
Execution 82ms
Transfer 123 KB
Unused 52%
Monthly Cost $1/mo
assets.adobedtm.com
Other
Optional
Execution 62ms
Transfer 89 KB
Unused 38%
Monthly Cost $1/mo
www.mastercard.com
Other
Optional
Execution 53ms
Transfer 9 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.mastercard.com adds 542ms and costs ~$7/month
  • Unattributable adds 484ms and costs ~$6/month
  • www.mastercard.com adds 290ms and costs ~$4/month
  • www.mastercard.com adds 280ms 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

www.mastercard.com takes 542ms 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 484ms 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 290ms 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 280ms 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

52% 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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