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https://macys.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
2
REVIEW
3
PASS
10
INFO
2

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

Mobile Desktop
61
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
73
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
88
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
80
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.

3.96 s

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

4.89 s

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

478 ms

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

0.000

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

3.96 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.

5.34 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
10 PASS 3 REVIEW 2 FIX
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 (476.4 KiB of 477.5 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2934ms total JS execution
FIX
2934ms total JS execution
Warning::
https://www.macys.com/public/0070376d64459df8f7c36...: 1156ms CPU time
Warning::
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34D...: 887ms CPU time
Warning::
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34D...: 518ms CPU time
Warning::
Unattributable: 320ms CPU time
Info::
https://www.macys.com/: 53ms CPU time
Warning::
Third-party scripts: 2934ms (100% of total)

Main Thread Breakdown

Script Evaluation 81% Other 11% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d1156ms1023ms21ms3rd
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgB887ms762ms70ms3rd
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?v=8eda77fe-0a8d-061b-9dc8-2119cae85435&t=956736894518ms454ms48ms3rd
Unattributable320ms122ms0ms3rd
https://www.macys.com/53ms7ms1ms3rd
B
JS Bundles
9 scripts, 68 KB unused
REVIEW
9 scripts, 68 KB unused
Warning::
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34D...: 36 KB unused (20%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34D...: 32 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 68 KB
68 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgB180 KB36 KB (20%)✓3rd
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?v=8eda77fe-0a8d-061b-9dc8-2119cae85435&t=956736894155 KB32 KB (21%)✓3rd
https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d66 KB—✓3rd
https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65319_1825202430.js18 KB—✓3rd
https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65257_1825232097.js7 KB—✓3rd
https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/64885_1825202523.js2 KB—✓3rd
https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65226_747628217.js33 KB—✓3rd
blob:https://www.macys.com/9405099c-0994-4d7d-a67c-e2aad277607f0 KB—✓3rd
blob:https://www.macys.com/044219df-2710-494b-9ad3-29f1635613f80 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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

Green Hosting

No green hosting detected

B
HTTP Caching
private, max-age=0, no-cache, must-revalidate
REVIEW
private, max-age=0, no-cache, must-revalidate
Info::
Cache-Control header is set
Got: private, max-age=0, no-cache, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, max-age=0, no-cache, must-revalidate

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age0Cache for 0 seconds
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
478 KB transferred, 18 requests
PASS
478 KB transferred, 18 requests
Info::
Page weighs 1.3 MB (478 KB transferred)
Info::
18 HTTP requests
Info::
Estimated 0.10 g CO2 per page load
478 KB / 2.4 MB budget
478 KB transferred
18 requests
0.10 g CO2 per page load
JavaScript 461.3 KiB 97%
Other 7.3 KiB 2%
HTML 5.6 KiB 1%
Other 3.4 KiB 1%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
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+
Image Optimization
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
18 resources · 478 KB · 68 KB savings available
PASS
18 resources · 478 KB · 68 KB savings available
Info::
Within 1MB page-weight target
Got: 478 KB
Info::
~68 KB of savings available
Warning::
17 third-party resources (100% of weight)
18 resources · 477.5 KiB · 17 third-party Within 1MB page-weight target
JavaScript 97% · 461.3 KiB
Image 1% · 6.2 KiB
Document 1% · 5.6 KiB
Other 1% · 4.5 KiB

~67.7 KiB of savings available

Remove unused JavaScript: 67.7 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
18 requests over 4406ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 4.0 s LCP 4.9 shttps://macys.com// https://macys.com/ — 301 — 1.1 KiB — 181 ms — http/1.1https://www.macys.com/www.macys.com/ https://www.macys.com/ — 200 — 5.2 KiB — 367 ms — h2https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?v=8eda77fe-0a8d-061b-9dc8-2119cae85435&t=956736894www.macys.com/YnlSPp/I-e/SLG/t2io5A... https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?v=8eda77fe-0a8d-061b-9dc8-2119cae85435&t=956736894 — 200 — 154.9 KiB — 62 ms — h2https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793dwww.macys.com/public/0070376d64459d... https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d — 200 — 66.3 KiB — 163 ms — h2https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgBwww.macys.com/YnlSPp/I-e/SLG/t2io5A... https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgB — 200 — 179.9 KiB — 65 ms — h2https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgBwww.macys.com/YnlSPp/I-e/SLG/t2io5A... https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgB — 201 — 1.2 KiB — 364 ms — h2https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65319_1825202430.jswww.macys.com/public/0070376d64459d... https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65319_1825202430.js — 200 — 18.5 KiB — 283 ms — h2https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65257_1825232097.jswww.macys.com/public/0070376d64459d... https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65257_1825232097.js — 200 — 6.6 KiB — 230 ms — h2https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/64885_1825202523.jswww.macys.com/public/0070376d64459d... https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/64885_1825202523.js — 200 — 2.1 KiB — 276 ms — h2https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65226_747628217.jswww.macys.com/public/0070376d64459d... https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/e/65226_747628217.js — 200 — 33.0 KiB — 297 ms — h2https://www.macys.com/favicon.icowww.macys.com/favicon.ico https://www.macys.com/favicon.ico — 200 — 6.2 KiB — 182 ms — h2blob:https://www.macys.com/9405099c-0994-4d7d-a67c-e2aad277607fwww.macys.com/9405099c-0994-4d7d-a6... blob:https://www.macys.com/9405099c-0994-4d7d-a67c-e2aad277607f — -1 — 0 B — 0 ms — blob:https://www.macys.com/044219df-2710-494b-9ad3-29f1635613f8www.macys.com/044219df-2710-494b-9a... blob:https://www.macys.com/044219df-2710-494b-9ad3-29f1635613f8 — -1 — 0 B — 0 ms — https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgBwww.macys.com/YnlSPp/I-e/SLG/t2io5A... https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgB — 201 — 1.3 KiB — 275 ms — h2https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?t=956736894www.macys.com/YnlSPp/I-e/SLG/t2io5A... https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?t=956736894 — 200 — 931 B — 78 ms — h2https://www.macys.com/www.macys.com/ https://www.macys.com/ — 403 — 379 B — 171 ms — h2https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/collect?t=1776293677434&st=3532&s=S2ySldHMSrw7Q1oO&ss=2&c=620ab7064b920c001680793d&r=m4Uq8Qo5Xq1wW5JR&d=0&u=https%3A%2F%2Fwww.macys.com%2F&v=1701637501&p=1&bv=9&rh=27c6f5ff949ed990ca95fad8b0ca36fe&pi=874&pl=1184&pwl=1184&ple=1184&psd=164&ppu=0&psl=40&pfu=191&phe=11&pue=-1&pbc=10&pnu=-1&pnc=-1&pnr=-1&fsp=0&sp=0&pp=0&ah=0&sm=1&tr=1www.macys.com/public/0070376d64459d... https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/collect?t=1776293677434&st=3532&s=S2ySldHMSrw7Q1oO&ss=2&c=620ab7064b920c001680793d&r=m4Uq8Qo5Xq1wW5JR&d=0&u=https%3A%2F%2Fwww.macys.com%2F&v=1701637501&p=1&bv=9&rh=27c6f5ff949ed990ca95fad8b0ca36fe&pi=874&pl=1184&pwl=1184&ple=1184&psd=164&ppu=0&psl=40&pfu=191&phe=11&pue=-1&pbc=10&pnu=-1&pnc=-1&pnr=-1&fsp=0&sp=0&pp=0&ah=0&sm=1&tr=1 — -1 — 0 B — 2 ms — https://www.macys.com/favicon.icowww.macys.com/favicon.ico https://www.macys.com/favicon.ico — 200 — 0 B — 2 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 2934ms · 223KB · $39/mo
www.macys.com
Other
Costly
Execution 1156ms
Transfer 66 KB
Monthly Cost $15/mo
www.macys.com
Other
Costly
Execution 887ms
Transfer 1 KB
Unused 20%
Monthly Cost $12/mo
www.macys.com
Other
Costly
Execution 518ms
Transfer 155 KB
Unused 21%
Monthly Cost $7/mo
Unattributable
Other
Costly
Execution 320ms
Transfer 0 KB
Monthly Cost $4/mo
www.macys.com
Other
Optional
Execution 53ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.macys.com adds 1156ms and costs ~$15/month
  • www.macys.com adds 887ms and costs ~$12/month
  • www.macys.com adds 518ms and costs ~$7/month
  • Unattributable adds 320ms 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.macys.com takes 1156ms 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.macys.com takes 887ms 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.macys.com takes 518ms 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 320ms 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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