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https://mastercard.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
67
GRADE
D
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
31
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
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.

4.28 s

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

171.03 s

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

1.44 s

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

0.010

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

52.96 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.

174.80 s

Page Load Progression

680 ms
1.4 s
2.0 s
2.7 s
3.4 s
4.1 s
4.8 s
5.4 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
86.1 MB transferred, 93 requests
FIX
86.1 MB transferred, 93 requests
Critical::
Page weighs 91.2 MB (86.1 MB transferred)
Warning::
Images are 61.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 61.1 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::
93 HTTP requests
Info::
Estimated 18.1 g CO2 per page load
86.1 MB / 2.4 MB budget
86.1 MB transferred
93 requests
18.1 g CO2 per page load
Images 61.1 MiB 71%
Other 23.3 MiB 27%
JavaScript 1.3 MiB 1%
Fonts 231.9 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 917 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 (86.1 MiB of 86.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
8546ms total JS execution
FIX
8546ms total JS execution
Warning::
https://www.mastercard.com/etc.clientlibs/marts/cl...: 2655ms CPU time
Warning::
Unattributable: 1831ms CPU time
Warning::
https://www.mastercard.com/TnsrgkIl6xzrl/kX6HU8ZlU...: 1010ms CPU time
Warning::
https://www.mastercard.com/es/es.html: 967ms CPU time
Warning::
https://asset.forms.mastercard.com/forms-ui@v2.0.8...: 712ms CPU time
Warning::
Third-party scripts: 8546ms (100% of total)

Main Thread Breakdown

Script Evaluation 40% Other 31% Style & Layout 15% Script Parsing & Compilation 6% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site.lc-ca8f99be5b638982eeb3847c915e0cfa-lc.min.js2655ms836ms255ms3rd
Unattributable1831ms146ms0ms3rd
https://www.mastercard.com/TnsrgkIl6xzrl/kX6HU8ZlUqt-/8U/1hEiXpimSOi3NL/YG9R/Iyp0ZU8/oZHEB1010ms835ms61ms3rd
https://www.mastercard.com/es/es.html967ms9ms3ms3rd
https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-ZQiyzviC.js712ms657ms0ms3rd
https://www.mastercard.com/etc.clientlibs/algolia/clientlibs/clientlib-site.lc-39e1e2e5e7bb50ebf287c0448303b970-lc.min.js449ms194ms109ms3rd
https://cdn.cookielaw.org/scripttemplates/202510.1.0/otBannerSdk.js333ms226ms49ms3rd
https://assets.adobedtm.com/acdc00762da2/83bdb98d95f8/launch-05f4b8356cc4.min.js254ms214ms30ms3rd
https://www.mastercard.com/akam/13/7cc499b4136ms111ms4ms3rd
https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-base.lc-106cff15e23c56989099b3ece5ea8455-lc.min.js72ms52ms6ms3rd

Showing top 10 of 12 scripts

F
JS Bundles
Action
33 scripts, 554 KB unused
FIX
33 scripts, 554 KB unused
Warning::
https://www.mastercard.com/etc.clientlibs/marts/cl...: 231 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: 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 KB231 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-ZQiyzviC.js26 KB—✓3rd
https://asset.forms.mastercard.com/forms-ui@v2.0.8/p-Ct6sGP3H.js1 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 · 86.1 MB · 554 KB savings available
FIX
93 resources · 86.1 MB · 554 KB savings available
Warning::
Page weight 85.1 MB over 1MB target
Got: 86.1 MB Expected: ≤ 1 MB
Info::
~554 KB of savings available
Warning::
92 third-party resources (100% of weight)
Info::
8 resources over 200KB
93 resources · 86.1 MiB · 92 third-party 85.1 MiB over 1MB target
Image 71% · 61.1 MiB
Media 27% · 23.3 MiB
JavaScript 1% · 1.3 MiB
Font 0% · 231.9 KiB
CSS 0% · 154.0 KiB
Other 0% · 57.5 KiB
Document 0% · 26.6 KiB

~553.6 KiB of savings available

Remove unused JavaScript: 553.6 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 61.1 MB
0 oversized -0 KB
9 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 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s 64.0 s 66.0 s 68.0 s 70.0 s 72.0 s 74.0 s 76.0 s 78.0 s 80.0 s 82.0 s 84.0 s 86.0 s 88.0 s 90.0 s 92.0 s 94.0 s 96.0 s 98.0 s 100.0 s 102.0 s 104.0 s 106.0 s 108.0 s 110.0 s 112.0 s 114.0 s 116.0 s 118.0 s 120.0 s 122.0 s 124.0 s 126.0 s 128.0 s 130.0 s 132.0 s 134.0 s 136.0 s 138.0 s 140.0 s 142.0 s 144.0 s 146.0 s 148.0 s 150.0 s 152.0 s 154.0 s 156.0 s 158.0 s 160.0 s 162.0 s 164.0 s 166.0 s 168.0 s 170.0 s 172.0 s 174.0 s 176.0 s 178.0 s FCP 4.3 s LCP 171.0 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 — 21 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 — 48 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 — 47 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/content/dam/mccom/eu/greece/fonts/MarkForMC-Med.woff2MarkForMC-Med.woff2 https://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC-Med.woff2 — 37.2 KiB — 17 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 — 37.7 KiB — 18 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 — 37.0 KiB — 19 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 — 75 ms — font-display: swap
MarkForMC-Med.woff2 woff2 swap
Size 36 KB
Load time 21 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
MarkForMC-Bold.woff2 woff2 swap
Size 36 KB
Load time 48 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
MarkForMC.woff2 woff2 swap
Size 36 KB
Load time 47 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
mccom-icons.ttf ttf swap
Size 7 KB
Load time 40 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
MarkForMC-Med.woff2 woff2 swap
Size 37 KB
Load time 17 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
MarkForMC.woff2 woff2 swap
Size 38 KB
Load time 18 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
MarkForMC-Bold.woff2 woff2 swap
Size 37 KB
Load time 19 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
font-woff;charset=utf-8... woff swap
Size 5 KB
Load time 75 ms
Start 1.8 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
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
93 requests over 3771ms
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 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s 64.0 s 66.0 s 68.0 s 70.0 s 72.0 s 74.0 s 76.0 s 78.0 s 80.0 s 82.0 s 84.0 s 86.0 s 88.0 s 90.0 s 92.0 s 94.0 s 96.0 s 98.0 s 100.0 s 102.0 s 104.0 s 106.0 s 108.0 s 110.0 s 112.0 s 114.0 s 116.0 s 118.0 s 120.0 s 122.0 s 124.0 s 126.0 s 128.0 s 130.0 s 132.0 s 134.0 s 136.0 s 138.0 s 140.0 s 142.0 s 144.0 s 146.0 s 148.0 s 150.0 s 152.0 s 154.0 s 156.0 s 158.0 s 160.0 s 162.0 s 164.0 s 166.0 s 168.0 s 170.0 s 172.0 s 174.0 s 176.0 s 178.0 s FCP 4.3 s LCP 171.0 shttps://mastercard.com// https://mastercard.com/ — 301 — 579 B — 806 ms — http/1.1https://www.mastercard.com/www.mastercard.com/ https://www.mastercard.com/ — 301 — 1.0 KiB — 30 ms — h2http://www.mastercard.com/es/es.htmlwww.mastercard.com/es/es.html http://www.mastercard.com/es/es.html — 307 — 0 B — 1 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 — 23 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 — 45 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 — 18 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 — 84 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 — 77 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 — 74 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 — 914 B — 75 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 — 71 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 115 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 — 39 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 — 28 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 — 30 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 — 31 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 — 33 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 — 44 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 — 36 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 — 912 B — 39 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?preferwebp=true&quality=82www.mastercard.com/adobe/dynamicmed... 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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 — 183 ms — h2https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--d46becfe-4262-4e2c-9cc6-609535d4af55/br45724-mastercard-websiteimageryrefresh-solutions-2-9x16-ezgif-com-loop-count.gif?preferwebp=true&quality=82www.mastercard.com/adobe/dynamicmed... https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--d46becfe-4262-4e2c-9cc6-609535d4af55/br45724-mastercard-websiteimageryrefresh-solutions-2-9x16-ezgif-com-loop-count.gif?preferwebp=true&quality=82 — 200 — 23.2 MiB — 1.6 s — 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 — 178 ms — h2https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--cb42b726-9398-4633-935e-78d37275c150/br45724-mastercard-websiteimageryrefresh-solutions-6-9x16.jpg?preferwebp=true&quality=82www.mastercard.com/adobe/dynamicmed... https://www.mastercard.com/adobe/dynamicmedia/deliver/dm-aid--cb42b726-9398-4633-935e-78d37275c150/br45724-mastercard-websiteimageryrefresh-solutions-6-9x16.jpg?preferwebp=true&quality=82 — 200 — 98.9 KiB — 410 ms — h2https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/Mark-For-MC/MarkForMC-Med.woff2www.mastercard.com/etc.clientlibs/m... https://www.mastercard.com/etc.clientlibs/marts/clientlibs/clientlib-site/resources/fonts/Mark-For-MC/MarkForMC-Med.woff2 — 200 — 36.0 KiB — 21 ms — 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200 — 37.7 KiB — 18 ms — h2https://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC-Bold.woff2www.mastercard.com/content/dam/mcco... https://www.mastercard.com/content/dam/mccom/eu/greece/fonts/MarkForMC-Bold.woff2 — 200 — 37.0 KiB — 19 ms — h2https://www.mastercard.com/libs/granite/csrf/token.jsonwww.mastercard.com/libs/granite/csr... https://www.mastercard.com/libs/granite/csrf/token.json — 200 — 644 B — 134 ms — 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 — 6 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 — 5 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAACWCAYAAABkW7XSAAAQAElEQVR4AeycCXzVNbbHk3tbyl5AN…data:image/png;base64,iVBORw0KGgoAA... 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https://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 — 4 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 — 921 B — 18 ms — h2https://www.mastercard.com/TnsrgkIl6xzrl/kX6HU8ZlUqt-/8U/1hEiXpimSOi3NL/YG9R/Iyp0ZU8/oZHEBwww.mastercard.com/TnsrgkIl6xzrl/kX... https://www.mastercard.com/TnsrgkIl6xzrl/kX6HU8ZlUqt-/8U/1hEiXpimSOi3NL/YG9R/Iyp0ZU8/oZHEB — 201 — 1.0 KiB — 256 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 8546ms · 1044KB · $113/mo
www.mastercard.com
Other
Costly
Execution 2655ms
Transfer 470 KB
Unused 49%
Monthly Cost $35/mo
Unattributable
Other
Costly
Execution 1831ms
Transfer 0 KB
Monthly Cost $24/mo
www.mastercard.com
Other
Costly
Execution 1010ms
Transfer 1 KB
Unused 21%
Monthly Cost $13/mo
www.mastercard.com
Other
Costly
Execution 967ms
Transfer 25 KB
Monthly Cost $13/mo
asset.forms.mastercard.com
Other
Costly
Execution 712ms
Transfer 26 KB
Monthly Cost $9/mo
www.mastercard.com
Other
Costly
Execution 449ms
Transfer 255 KB
Unused 75%
Monthly Cost $6/mo
OneTrust
Consent
Essential
Execution 333ms
Transfer 123 KB
Unused 52%
Monthly Cost $4/mo
assets.adobedtm.com
Other
Costly
Execution 254ms
Transfer 89 KB
Unused 38%
Monthly Cost $3/mo
www.mastercard.com
Other
Optional
Execution 136ms
Transfer 9 KB
Monthly Cost $2/mo
www.mastercard.com
Other
Optional
Execution 72ms
Transfer 8 KB
Monthly Cost $1/mo
OneTrust
Consent
Essential
Execution 66ms
Transfer 9 KB
Monthly Cost $1/mo
www.mastercard.com
Other
Optional
Execution 63ms
Transfer 29 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.mastercard.com adds 2655ms and costs ~$35/month
  • Unattributable adds 1831ms and costs ~$24/month
  • www.mastercard.com adds 1010ms and costs ~$13/month
  • www.mastercard.com adds 967ms and costs ~$13/month
  • asset.forms.mastercard.com adds 712ms and costs ~$9/month
  • www.mastercard.com adds 449ms and costs ~$6/month
  • assets.adobedtm.com adds 254ms and costs ~$3/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 2655ms 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 1831ms 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 1010ms 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 967ms 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 712ms 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 449ms 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

assets.adobedtm.com takes 254ms 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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