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https://macys.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
95
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.

1.07 s

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

1.27 s

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

10 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.

1.07 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.

1.27 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
15
8 PASS 4 REVIEW 1 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 (465.7 KiB of 466.8 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
B
JS Execution Cost
675ms total JS execution
REVIEW
675ms total JS execution
Warning::
https://www.macys.com/public/0070376d64459df8f7c36...: 274ms CPU time
Info::
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34D...: 182ms CPU time
Info::
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34D...: 127ms CPU time
Info::
Unattributable: 92ms CPU time
Warning::
Third-party scripts: 675ms (100% of total)

Main Thread Breakdown

Script Evaluation 81% Other 11% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d274ms244ms7ms3rd
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/w3a34DOYOp3JQD1JiG/DUgiAQ/Ens/IUVlFSHgB182ms159ms10ms3rd
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?v=4155fcc6-4cfd-610c-85c7-ed9e32fc5435&t=958690019127ms113ms12ms3rd
Unattributable92ms40ms0ms3rd
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 (21%)
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/IUVlFSHgB170 KB36 KB (21%)✓3rd
https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?v=4155fcc6-4cfd-610c-85c7-ed9e32fc5435&t=958690019155 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/9ddcb402-28d7-43b0-9c88-033ce718c90d0 KB—✓3rd
blob:https://www.macys.com/4a806e12-899d-4f97-be10-5b8701d1a5ac0 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
467 KB transferred, 18 requests
PASS
467 KB transferred, 18 requests
Info::
Page weighs 1.3 MB (467 KB transferred)
Info::
18 HTTP requests
Info::
Estimated 0.10 g CO2 per page load
467 KB / 2.4 MB budget
467 KB transferred
18 requests
0.10 g CO2 per page load
JavaScript 450.8 KiB 97%
Other 7.3 KiB 2%
HTML 5.5 KiB 1%
Other 3.2 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 · 467 KB · 68 KB savings available
PASS
18 resources · 467 KB · 68 KB savings available
Info::
Within 1MB page-weight target
Got: 467 KB
Info::
~68 KB of savings available
Warning::
17 third-party resources (100% of weight)
18 resources · 466.8 KiB · 17 third-party Within 1MB page-weight target
JavaScript 97% · 450.8 KiB
Image 1% · 6.1 KiB
Document 1% · 5.5 KiB
Other 1% · 4.4 KiB

~67.7 KiB of savings available

Remove unused JavaScript: 67.7 KiB
Network Waterfall
18 requests over 4586ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.1 s LCP 1.3 shttps://macys.com// https://macys.com/ — 301 — 1.1 KiB — 246 ms — http/1.1https://www.macys.com/www.macys.com/ https://www.macys.com/ — 200 — 5.1 KiB — 497 ms — h2https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?v=4155fcc6-4cfd-610c-85c7-ed9e32fc5435&t=958690019www.macys.com/YnlSPp/I-e/SLG/t2io5A... https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?v=4155fcc6-4cfd-610c-85c7-ed9e32fc5435&t=958690019 — 200 — 154.8 KiB — 95 ms — h2https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793dwww.macys.com/public/0070376d64459d... https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d — 200 — 66.2 KiB — 232 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 — 169.9 KiB — 93 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 — 276 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 — 18.4 KiB — 140 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 — 6.5 KiB — 140 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 — 152 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 — 32.9 KiB — 142 ms — h2https://www.macys.com/favicon.icowww.macys.com/favicon.ico https://www.macys.com/favicon.ico — 200 — 6.1 KiB — 139 ms — h2blob:https://www.macys.com/9ddcb402-28d7-43b0-9c88-033ce718c90dwww.macys.com/9ddcb402-28d7-43b0-9c... blob:https://www.macys.com/9ddcb402-28d7-43b0-9c88-033ce718c90d — -1 — 0 B — 0 ms — blob:https://www.macys.com/4a806e12-899d-4f97-be10-5b8701d1a5acwww.macys.com/4a806e12-899d-4f97-be... blob:https://www.macys.com/4a806e12-899d-4f97-be10-5b8701d1a5ac — -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 — 1.2 KiB — 502 ms — h2https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?t=958690019www.macys.com/YnlSPp/I-e/SLG/t2io5A... https://www.macys.com/YnlSPp/I-e/SLG/t2io5A/kza34DOYOp3J/ADwoAQ/dlg/2TnNnblwNAg?t=958690019 — 200 — 860 B — 242 ms — h2https://www.macys.com/www.macys.com/ https://www.macys.com/ — 403 — 379 B — 235 ms — h2https://www.macys.com/public/0070376d64459df8f7c3620ab7064b920c001680793d/collect?t=1776293693630&st=3498&s=YeFAu7FTHEkes4Db&ss=2&c=620ab7064b920c001680793d&r=eX1XlD3pVFHY780t&d=0&u=https%3A%2F%2Fwww.macys.com%2F&v=1701637501&p=1&bv=9&rh=27c6f5ff949ed990ca95fad8b0ca36fe&pi=1101&pl=1259&pwl=1260&ple=1259&psd=233&ppu=0&psl=52&pfu=251&phe=9&pue=-1&pbc=8&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=1776293693630&st=3498&s=YeFAu7FTHEkes4Db&ss=2&c=620ab7064b920c001680793d&r=eX1XlD3pVFHY780t&d=0&u=https%3A%2F%2Fwww.macys.com%2F&v=1701637501&p=1&bv=9&rh=27c6f5ff949ed990ca95fad8b0ca36fe&pi=1101&pl=1259&pwl=1260&ple=1259&psd=233&ppu=0&psl=52&pfu=251&phe=9&pue=-1&pbc=8&pnu=-1&pnc=-1&pnr=-1&fsp=0&sp=0&pp=0&ah=0&sm=1&tr=1 — -1 — 0 B — 1 ms — https://www.macys.com/favicon.icowww.macys.com/favicon.ico https://www.macys.com/favicon.ico — 200 — 0 B — 1 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 675ms · 222KB · $9/mo
www.macys.com
Other
Costly
Execution 274ms
Transfer 66 KB
Monthly Cost $4/mo
www.macys.com
Other
Optional
Execution 182ms
Transfer 1 KB
Unused 21%
Monthly Cost $2/mo
www.macys.com
Other
Optional
Execution 127ms
Transfer 155 KB
Unused 21%
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 92ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.macys.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

www.macys.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

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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