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https://mex.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
2
REVIEW
3
PASS
10
INFO
2

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

Mobile Desktop
89
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

2.64 s

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

3.22 s

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

89 ms

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

0.036

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

2.78 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

6.30 s

Page Load Progression

536 ms
1.1 s
1.6 s
2.1 s
2.7 s
3.2 s
3.8 s
4.3 s
Checks
17
10 PASS 3 REVIEW 2 FIX
D
JS Bundles
Action
8 scripts, 190 KB unused
FIX
8 scripts, 190 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-WE9H...: 66 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PHV...: 64 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://mex.com/assets/js/lib/jquery-3.5.1.min.js: 60 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://mex.com/assets/js/main.js?v=1.0.1: unminified — 2 KB could be saved
Info::
Total unused JavaScript: 190 KB
190 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-WE9HLSV2T6&cx=c&gtm=4e64h1157 KB66 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PHV82LT4117 KB64 KB (55%)✓3rd
https://mex.com/assets/js/lib/jquery-3.5.1.min.js88 KB60 KB (68%)✓1st
https://mex.com/assets/js/lib/modernizr.min.js?v=1.013 KB—✓1st
https://mex.com/assets/js/main.js?v=1.0.15 KB—✗1st
https://mex.com/assets/js/lib/underscore.min.js?v=1.0.116 KB—✓1st
https://mex.com/assets/js/search.js?v=1.1.0116 KB—✗1st
https://mex.com/assets/js/home.js?v=1.0.110 KB—✗1st

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
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
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://mex.com/assets/img/logos/mexcom-primary.sv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mex.com/assets/img/icons/icon-mexcom-seo.s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mex.com/assets/img/icons/icon-mexcom-globa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mex.com/assets/img/oversized-icon.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mex.com/assets/img/domain-comparison-table... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mex.com/assets/img/logos/mexcom-white-sing... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mex.com/assets/img/icons/icon-mexcom-unmat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mex.com/assets/img/icons/icon-mexcom-biz-e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mex.com/assets/img/icons/icon-mexcom-no-re... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 163 KB
0 oversized -0 KB
13 legacy format
9 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Execution Cost
925ms total JS execution
REVIEW
925ms total JS execution
Warning::
Unattributable: 343ms CPU time
Info::
https://mex.com/: 198ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-WE9H...: 183ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-PHV...: 149ms CPU time
Info::
https://mex.com/assets/js/lib/modernizr.min.js?v=1...: 53ms CPU time
Warning::
Third-party scripts: 674ms (73% of total)

Main Thread Breakdown

Script Evaluation 41% Other 30% Style & Layout 14% Script Parsing & Compilation 8% Rendering 5%
ScriptTotalScriptingParse/CompileParty
Unattributable343ms85ms0ms3rd
https://mex.com/198ms6ms1ms1st
https://www.googletagmanager.com/gtag/js?id=G-WE9HLSV2T6&cx=c&gtm=4e64h1183ms126ms37ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PHV82LT4149ms113ms27ms3rd
https://mex.com/assets/js/lib/modernizr.min.js?v=1.053ms26ms1ms1st
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
718 KB transferred, 28 requests
PASS
718 KB transferred, 28 requests
Info::
Page weighs 1.2 MB (718 KB transferred)
Info::
28 HTTP requests
Info::
Estimated 0.15 g CO2 per page load
718 KB / 2.4 MB budget
718 KB transferred
28 requests
0.15 g CO2 per page load
JavaScript 422.2 KiB 59%
Images 163.2 KiB 23%
CSS 101.7 KiB 14%
Fonts 19.6 KiB 3%
HTML 9.2 KiB 1%
Other 2.1 KiB 0%
Other 543 B 0%
0 2.4 MB 4.9 MB
Under budget
A
Third-Party Impact
38% third-party, 0 ms blocking
PASS
38% third-party, 0 ms blocking
Info::
Third-party code accounts for 38% of page weight (275.0 KiB of 718.5 KiB)
Info::
Third-party blocking time is low (0 ms)
62%
38%
First-party Third-party
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
2 fonts (20 KB)
PASS
2 fonts (20 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

20 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 2.6 s LCP 3.2 shttps://mex.com/assets/fonts/albert-sans/albert-sans-v1-latin-900.woff2albert-sans-v1-latin-90... https://mex.com/assets/fonts/albert-sans/albert-sans-v1-latin-900.woff2 — 9.8 KiB — 298 ms — font-display: swaphttps://mex.com/assets/fonts/albert-sans/albert-sans-v1-latin-regular.woff2albert-sans-v1-latin-re... https://mex.com/assets/fonts/albert-sans/albert-sans-v1-latin-regular.woff2 — 9.7 KiB — 297 ms — font-display: swap
albert-sans-v1-latin-90... woff2 swap
Size 10 KB
Load time 298 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
albert-sans-v1-latin-re... woff2 swap
Size 10 KB
Load time 297 ms
Start 1.2 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)
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+
Page Weight Inventory
28 resources · 718 KB · 190 KB savings available
PASS
28 resources · 718 KB · 190 KB savings available
Info::
Within 1MB page-weight target
Got: 718 KB
Info::
~190 KB of savings available
Info::
3 third-party resources (38% of weight)
28 resources · 718.5 KiB · 3 third-party Within 1MB page-weight target
JavaScript 59% · 422.2 KiB
Image 23% · 165.3 KiB
CSS 14% · 101.7 KiB
Font 3% · 19.6 KiB
Document 1% · 9.2 KiB
Other 0% · 543 B

~190.2 KiB of savings available

Remove unused JavaScript: 190.2 KiB
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
28 requests over 1984ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.6 s LCP 3.2 shttps://mex.com// https://mex.com/ — 200 — 9.2 KiB — 482 ms — http/1.1https://mex.com/assets/css/bootstrap-grid.min.css/assets/css/bootstrap-grid.min.css https://mex.com/assets/css/bootstrap-grid.min.css — 200 — 50.5 KiB — 319 ms — http/1.1https://mex.com/assets/css/style.css?v=1.1.3/assets/css/style.css?v=1.1.3 https://mex.com/assets/css/style.css?v=1.1.3 — 200 — 51.2 KiB — 476 ms — http/1.1https://mex.com/assets/js/lib/modernizr.min.js?v=1.0/assets/js/lib/modernizr.min.js?v=1... https://mex.com/assets/js/lib/modernizr.min.js?v=1.0 — 200 — 12.7 KiB — 637 ms — http/1.1https://mex.com/assets/img/logos/mexcom-white-single-color.svg/assets/img/logos/mexcom-white-sing... https://mex.com/assets/img/logos/mexcom-white-single-color.svg — 200 — 6.4 KiB — 479 ms — http/1.1https://mex.com/assets/img/logos/mexcom-primary.svg/assets/img/logos/mexcom-primary.sv... https://mex.com/assets/img/logos/mexcom-primary.svg — 200 — 11.2 KiB — 492 ms — http/1.1https://mex.com/assets/img/icons/loader.svg/assets/img/icons/loader.svg https://mex.com/assets/img/icons/loader.svg — 200 — 3.0 KiB — 160 ms — http/1.1https://mex.com/assets/img/icons/icon-mexcom-unmatched.png/assets/img/icons/icon-mexcom-unmat... https://mex.com/assets/img/icons/icon-mexcom-unmatched.png — 200 — 11.1 KiB — 166 ms — http/1.1https://mex.com/assets/img/icons/icon-mexcom-biz-expansion.svg/assets/img/icons/icon-mexcom-biz-e... https://mex.com/assets/img/icons/icon-mexcom-biz-expansion.svg — 200 — 4.2 KiB — 161 ms — http/1.1https://mex.com/assets/js/lib/jquery-3.5.1.min.js/assets/js/lib/jquery-3.5.1.min.js https://mex.com/assets/js/lib/jquery-3.5.1.min.js — 200 — 87.6 KiB — 320 ms — http/1.1https://mex.com/assets/js/main.js?v=1.0.1/assets/js/main.js?v=1.0.1 https://mex.com/assets/js/main.js?v=1.0.1 — 200 — 5.1 KiB — 162 ms — http/1.1https://mex.com/assets/js/lib/underscore.min.js?v=1.0.1/assets/js/lib/underscore.min.js?v=... https://mex.com/assets/js/lib/underscore.min.js?v=1.0.1 — 200 — 16.3 KiB — 329 ms — http/1.1https://mex.com/assets/js/search.js?v=1.1.01/assets/js/search.js?v=1.1.01 https://mex.com/assets/js/search.js?v=1.1.01 — 200 — 16.2 KiB — 171 ms — http/1.1https://www.googletagmanager.com/gtm.js?id=GTM-PHV82LT4www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PHV82LT4 — 200 — 117.4 KiB — 156 ms — h2https://mex.com/assets/js/home.js?v=1.0.1/assets/js/home.js?v=1.0.1 https://mex.com/assets/js/home.js?v=1.0.1 — 200 — 9.8 KiB — 332 ms — http/1.1https://mex.com/assets/fonts/albert-sans/albert-sans-v1-latin-900.woff2/assets/fonts/albert-sans/albert-sa... https://mex.com/assets/fonts/albert-sans/albert-sans-v1-latin-900.woff2 — 200 — 9.8 KiB — 298 ms — http/1.1https://mex.com/assets/fonts/albert-sans/albert-sans-v1-latin-regular.woff2/assets/fonts/albert-sans/albert-sa... https://mex.com/assets/fonts/albert-sans/albert-sans-v1-latin-regular.woff2 — 200 — 9.7 KiB — 297 ms — http/1.1https://mex.com/assets/img/icons/icon-mexcom-seo.svg/assets/img/icons/icon-mexcom-seo.s... https://mex.com/assets/img/icons/icon-mexcom-seo.svg — 200 — 5.8 KiB — 306 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=G-WE9HLSV2T6&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-WE9HLSV2T6&cx=c&gtm=4e64h1 — 200 — 157.1 KiB — 61 ms — h2https://mex.com/assets/img/icons/icon-mexcom-no-restrictions.svg/assets/img/icons/icon-mexcom-no-re... https://mex.com/assets/img/icons/icon-mexcom-no-restrictions.svg — 200 — 7.0 KiB — 162 ms — http/1.1https://mex.com/assets/img/icons/icon-mexcom-global.svg/assets/img/icons/icon-mexcom-globa... https://mex.com/assets/img/icons/icon-mexcom-global.svg — 200 — 9.0 KiB — 161 ms — http/1.1https://mex.com/assets/img/oversized-icon.svg/assets/img/oversized-icon.svg https://mex.com/assets/img/oversized-icon.svg — 200 — 5.2 KiB — 161 ms — http/1.1https://mex.com/assets/img/domain-comparison-table-desktop.png/assets/img/domain-comparison-table... https://mex.com/assets/img/domain-comparison-table-desktop.png — 200 — 49.2 KiB — 328 ms — http/1.1https://region1.google-analytics.com/g/collect?v=2&tid=G-WE9HLSV2T6&gtm=45je64h1v9216916260z89216911364za20gzb9216911364zd9216911364&_p=1776809035403&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=2030195102.1776809036&frm=0&pscdl=noapi&rcb=6&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266400~117384405~117512543&sid=1776809036&sct=1&seg=0&dl=https%3A%2F%2Fmex.com%2F&dt=.MEX.COM%20%7C%20The%20Global%20Domain%20for%20Mexico&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1479region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-WE9HLSV2T6&gtm=45je64h1v9216916260z89216911364za20gzb9216911364zd9216911364&_p=1776809035403&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=2030195102.1776809036&frm=0&pscdl=noapi&rcb=6&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266400~117384405~117512543&sid=1776809036&sct=1&seg=0&dl=https%3A%2F%2Fmex.com%2F&dt=.MEX.COM%20%7C%20The%20Global%20Domain%20for%20Mexico&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1479 — 204 — 543 B — 91 ms — h2https://mex.com/assets/img/domain-comparison-table-mobile.png/assets/img/domain-comparison-table... https://mex.com/assets/img/domain-comparison-table-mobile.png — 200 — 48.2 KiB — 327 ms — http/1.1https://mex.com/assets/img/icons/mexcom-mag-glass-location.svg/assets/img/icons/mexcom-mag-glass-... https://mex.com/assets/img/icons/mexcom-mag-glass-location.svg — 200 — 2.2 KiB — 160 ms — http/1.1https://mex.com/assets/img/icons/baseline-open_in_new-24px.svg/assets/img/icons/baseline-open_in_... https://mex.com/assets/img/icons/baseline-open_in_new-24px.svg — 200 — 795 B — 160 ms — http/1.1https://mex.com/assets/img/favicon-32x32.png?v=3/assets/img/favicon-32x32.png?v=3 https://mex.com/assets/img/favicon-32x32.png?v=3 — 200 — 2.1 KiB — 165 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
73% of JavaScript execution is third-party
First-party Third-party 674ms · 274KB · €7/mo
Unattributable
Other
Costly
Execution 343ms
Transfer 0 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Optional
Execution 183ms
Transfer 157 KB
Unused 42%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 149ms
Transfer 117 KB
Unused 55%
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • Unattributable adds 343ms and costs ~€4/month

73% 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 343ms 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

55% of Google Tag Manager'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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