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https://stevemadden.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
47
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

1.13 s

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

2.58 s

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

744 ms

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

0.073

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

4.77 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.

13.21 s

Page Load Progression

1.4 s
2.8 s
4.2 s
5.6 s
7.0 s
8.4 s
9.8 s
11.2 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
10.5 MB transferred, 621 requests
FIX
10.5 MB transferred, 621 requests
Critical::
Page weighs 25.4 MB (10.5 MB transferred)
Warning::
JavaScript is 4.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 4.6 MB
Warning::
Images are 3.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.2 MB
Info::
Fonts are 838 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 838 KB
Warning::
621 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.2 g CO2 per page load
10.5 MB / 2.4 MB budget
10.5 MB transferred
621 requests
2.2 g CO2 per page load
JavaScript 4.6 MiB 44%
Images 3.2 MiB 31%
Other 1.3 MiB 12%
Fonts 837.5 KiB 8%
Other 247.3 KiB 2%
HTML 170.8 KiB 2%
CSS 106.1 KiB 1%
Other 30.8 KiB 0%
Other 11.8 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (10.5 MiB of 10.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
10711ms total JS execution
FIX
10711ms total JS execution
Warning::
https://www.redditstatic.com/ads/pixel.js?pixel_id...: 4134ms CPU time
Warning::
https://www.stevemadden.com/: 1786ms CPU time
Warning::
Unattributable: 1047ms CPU time
Warning::
https://www.stevemadden.com/cdn/wpm/b0e8c7c7aw41bd...: 929ms CPU time
Warning::
https://sgtm.stevemadden.com/gtm.js?id=GTM-MPLJCX2: 542ms CPU time
Warning::
Third-party scripts: 10711ms (100% of total)

Main Thread Breakdown

Script Evaluation 68% Other 12% Style & Layout 11% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.redditstatic.com/ads/pixel.js?pixel_id=a2_ilsofmugd5j94134ms4076ms1ms3rd
https://www.stevemadden.com/1786ms169ms37ms3rd
Unattributable1047ms91ms0ms3rd
https://www.stevemadden.com/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js929ms638ms6ms3rd
https://sgtm.stevemadden.com/gtm.js?id=GTM-MPLJCX2542ms459ms27ms3rd
https://vice-prod.sdiapi.com/vice_loader/stevemadden/stevemadden439ms349ms8ms3rd
https://staticw2.yotpo.com/Z1ia318TQD3H8cgES4O27MG5V4gPgT9PRiUZPs9P/widget.js?shop=stevemadden.myshopify.com&v2enforce=true276ms110ms9ms3rd
https://sgtm.stevemadden.com/gtag/js?id=DC-9201747&cx=c&gtm=4e6461&sign=c6b5b76de8e045899a9a166920c9da87e5428e061e7adc4123bd2e97ef367ba7_20260408172ms140ms8ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js116ms111ms2ms3rd
https://www.stevemadden.com/cdn/shop/t/1716/assets/jquery.min.js?v=8324501383853434791755524685114ms102ms2ms3rd

Showing top 10 of 24 scripts

F
JS Bundles
Action
297 scripts, 1.5 MB unused
FIX
297 scripts, 1.5 MB unused
Warning::
https://cdnapisec.kaltura.com/p/2527131/embedPlayk...: 277 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.luckylabs.io/prd/store-locator/org/ind...: 108 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.luckylabs.io/prd/lucky-local/org/built...: 96 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.squarecdn.com/square-marketplace.js: 81 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://staticw2.yotpo.com/Z1ia318TQD3H8cgES4O27MG...: 72 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.5 MB
1515 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdnapisec.kaltura.com/p/2527131/embedPlaykitJs/uiconf_id/43953791409 KB277 KB (68%)✓3rd
https://cdn.luckylabs.io/prd/store-locator/org/index.js157 KB108 KB (69%)✓3rd
https://cdn.luckylabs.io/prd/lucky-local/org/built-sources/index.js176 KB96 KB (55%)✓3rd
https://js.squarecdn.com/square-marketplace.js138 KB81 KB (59%)✓3rd
https://staticw2.yotpo.com/Z1ia318TQD3H8cgES4O27MG5V4gPgT9PRiUZPs9P/widget.js?shop=stevemadden.myshopify.com&v2enforce=true106 KB72 KB (68%)✓3rd
https://sgtm.stevemadden.com/gtag/js?id=G-ZFX8CW65MJ&cx=c&gtm=4e6461&sign=c6b5b76de8e045899a9a166920c9da87e5428e061e7adc4123bd2e97ef367ba7_20260408158 KB62 KB (39%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-YX1WM4PD60&cx=c&gtm=4e6461&sign=c6b5b76de8e045899a9a166920c9da87e5428e061e7adc4123bd2e97ef367ba7_20260408143 KB60 KB (42%)✓3rd
https://sgtm.stevemadden.com/gtag/js?id=DC-9201747&cx=c&gtm=4e6461&sign=c6b5b76de8e045899a9a166920c9da87e5428e061e7adc4123bd2e97ef367ba7_20260408128 KB59 KB (46%)✓3rd
https://sgtm.stevemadden.com/gtag/js?id=AW-1058467247&cx=c&gtm=4e6461&sign=c6b5b76de8e045899a9a166920c9da87e5428e061e7adc4123bd2e97ef367ba7_20260408145 KB49 KB (34%)✓3rd
https://sgtm.stevemadden.com/gtm.js?id=GTM-MPLJCX2201 KB48 KB (24%)✓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

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, no-store

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
no-store—Never cache this response
C
Image Optimization
Action
76 images, 0 KB saveable
REVIEW
76 images, 0 KB saveable
Warning::
https://images.contentstack.io/v3/assets/blt563c80... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.contentstack.io/v3/assets/blt563c80... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/2170/8465/files/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
76 images 3.2 MB
0 oversized -0 KB
52 legacy format
4 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

Performance issues directly impact user engagement and conversion rates.

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

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
13 fonts (838 KB)
PASS
13 fonts (838 KB)
Info::
13 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

13

838 KB total

Render-blocking

0

of 13

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.1 s LCP 2.6 shttps://use.typekit.net/af/46da36/00000000000000003b9acaf6/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/46da36/00000000000000003b9acaf6/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 26.4 KiB — 0 ms — font-display: swaphttps://www.dolcevita.com/cdn/shop/files/arimo-regular-webfont.woff2?v=9302334437808075133arimo-regular-webfont.w... https://www.dolcevita.com/cdn/shop/files/arimo-regular-webfont.woff2?v=9302334437808075133 — 19.0 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/c4767b/00000000000000003b9acb20/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3l https://use.typekit.net/af/c4767b/00000000000000003b9acb20/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3 — 24.4 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/6d4bb2/00000000000000003b9acafc/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3l https://use.typekit.net/af/6d4bb2/00000000000000003b9acafc/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3 — 26.0 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/027dd4/00000000000000003b9acafa/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3l https://use.typekit.net/af/027dd4/00000000000000003b9acafa/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3 — 26.3 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/be1794/00000000000000003b9acb45/27/l?subset_id=2&fvd=n7&v=3l https://use.typekit.net/af/be1794/00000000000000003b9acb45/27/l?subset_id=2&fvd=n7&v=3 — 18.6 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/aa5b59/00000000000000003b9acaf7/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i4&v=3l https://use.typekit.net/af/aa5b59/00000000000000003b9acaf7/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i4&v=3 — 27.6 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/1e205b/00000000000000003b9acb24/27/l?subset_id=2&fvd=n9&v=3l https://use.typekit.net/af/1e205b/00000000000000003b9acb24/27/l?subset_id=2&fvd=n9&v=3 — 17.3 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/f2b2eb/00000000000000003b9acb1a/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/f2b2eb/00000000000000003b9acb1a/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 25.0 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/2170/8465/files/AcuminVariableConcept.otf?v=1772048764AcuminVariableConcept.otf https://cdn.shopify.com/s/files/1/2170/8465/files/AcuminVariableConcept.otf?v=1772048764 — 495.9 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/shop-assets/static_uploads/shoplift/GTStandard-MRegular.woff2GTStandard-MRegular.woff2 https://cdn.shopify.com/shop-assets/static_uploads/shoplift/GTStandard-MRegular.woff2 — 63.1 KiB — 0 ms — font-display: swaphttps://staticw2.yotpo.com/web-fonts/opensans/v34/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.woff2open-sans-v34-vietnames... https://staticw2.yotpo.com/web-fonts/opensans/v34/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.woff2 — 55.5 KiB — 0 ms — font-display: swaphttps://staticw2.yotpo.com/assets/yotpo-widget-font.woff?version=2025-04-01_13-42-39yotpo-widget-font.woff https://staticw2.yotpo.com/assets/yotpo-widget-font.woff?version=2025-04-01_13-42-39 — 12.4 KiB — 0 ms — font-display: swap
l woff2 swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
arimo-regular-webfont.w... woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 24 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 28 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 17 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 25 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
AcuminVariableConcept.otf otf swap
Size 496 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
GTStandard-MRegular.woff2 woff2 swap
Size 63 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
open-sans-v34-vietnames... woff2 swap
Size 55 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
yotpo-widget-font.woff woff swap
Size 12 KB
Load time 0 ms
Start 0 ms
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 ~400 KB and ~800 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
621 requests over 0ms
INFO

Performance analysis not available for this result.

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 10711ms · 1956KB · €57/mo
www.redditstatic.com
Other
Costly
Execution 4134ms
Transfer 19 KB
Monthly Cost €22/mo
www.stevemadden.com
Other
Costly
Execution 1786ms
Transfer 139 KB
Monthly Cost €9/mo
Unattributable
Other
Costly
Execution 1047ms
Transfer 0 KB
Monthly Cost €6/mo
www.stevemadden.com
Other
Costly
Execution 929ms
Transfer 61 KB
Unused 37%
Monthly Cost €5/mo
sgtm.stevemadden.com
Other
Costly
Execution 542ms
Transfer 201 KB
Unused 24%
Monthly Cost €3/mo
vice-prod.sdiapi.com
Other
Costly
Execution 439ms
Transfer 42 KB
Monthly Cost €2/mo
staticw2.yotpo.com
Other
Costly
Execution 276ms
Transfer 106 KB
Unused 68%
Monthly Cost €1/mo
sgtm.stevemadden.com
Other
Optional
Execution 172ms
Transfer 128 KB
Unused 46%
Monthly Cost €1/mo
Microsoft Clarity
Session Replay
Optional
Execution 116ms
Transfer 26 KB
Monthly Cost €1/mo
www.stevemadden.com
Other
Optional
Execution 114ms
Transfer 30 KB
Monthly Cost €1/mo
cdn.shopify.com
Other
Optional
Execution 107ms
Transfer 85 KB
Unused 49%
Monthly Cost €1/mo
assets.gorgias.chat
Other
Optional
Execution 104ms
Transfer 93 KB
Unused 49%
Monthly Cost €1/mo
cdnapisec.kaltura.com
Other
Optional
Execution 102ms
Transfer 409 KB
Unused 68%
Monthly Cost €1/mo
cdn.shopify.com
Other
Optional
Execution 94ms
Transfer 1 KB
Unused 52%
Monthly Cost €0/mo
cdn.luckylabs.io
Other
Optional
Execution 91ms
Transfer 176 KB
Unused 55%
Monthly Cost €0/mo
www.stevemadden.com
Other
Optional
Execution 88ms
Transfer 1 KB
Monthly Cost €0/mo
www.stevemadden.com
Other
Optional
Execution 85ms
Transfer 15 KB
Monthly Cost €0/mo
cdn.taboola.com
Other
Optional
Execution 85ms
Transfer 30 KB
Monthly Cost €0/mo
tags.pw.adn.cloud
Other
Optional
Execution 85ms
Transfer 43 KB
Unused 58%
Monthly Cost €0/mo
unpkg
CDN
Optional
Execution 80ms
Transfer 3 KB
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 70ms
Transfer 143 KB
Unused 42%
Monthly Cost €0/mo
www.stevemadden.com
Other
Optional
Execution 58ms
Transfer 28 KB
Monthly Cost €0/mo
sgtm.stevemadden.com
Other
Optional
Execution 56ms
Transfer 158 KB
Unused 39%
Monthly Cost €0/mo
beacon.riskified.com
Other
Optional
Execution 51ms
Transfer 17 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.redditstatic.com adds 4134ms and costs ~€22/month
  • www.stevemadden.com adds 1786ms and costs ~€9/month
  • Unattributable adds 1047ms and costs ~€6/month
  • www.stevemadden.com adds 929ms and costs ~€5/month
  • sgtm.stevemadden.com adds 542ms and costs ~€3/month
  • vice-prod.sdiapi.com adds 439ms and costs ~€2/month
  • staticw2.yotpo.com adds 276ms and costs ~€1/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.redditstatic.com takes 4134ms 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.stevemadden.com takes 1786ms 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 1047ms 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.stevemadden.com takes 929ms 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

sgtm.stevemadden.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

vice-prod.sdiapi.com takes 439ms 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

staticw2.yotpo.com takes 276ms 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

68% of staticw2.yotpo.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

68% of cdnapisec.kaltura.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 cdn.shopify.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

55% of cdn.luckylabs.io'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

58% of tags.pw.adn.cloud'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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