Skip to content
https://www.ebay.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
5
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
25
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
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.

5.31 s

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

24.21 s

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

2.59 s

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

0.103

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

9.73 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.

24.88 s

Page Load Progression

435 ms
870 ms
1.3 s
1.7 s
2.2 s
2.6 s
3.0 s
3.5 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
3.0 MB transferred, 179 requests
FIX
3.0 MB transferred, 179 requests
Warning::
Page weighs 10.6 MB (3.0 MB transferred)
Warning::
JavaScript is 1.9 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.9 MB
Warning::
179 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.63 g CO2 per page load
3.0 MB / 2.4 MB budget
3.0 MB transferred
179 requests
0.63 g CO2 per page load
JavaScript 1.9 MiB 64%
Images 512.8 KiB 17%
Other 242.6 KiB 8%
HTML 170.5 KiB 6%
CSS 110.7 KiB 4%
Fonts 51.3 KiB 2%
Other 10.1 KiB 0%
Other 5.4 KiB 0%
Other 1.4 KiB 0%
Other 326 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

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
76% third-party, 0 ms blocking
FIX
76% third-party, 0 ms blocking
Warning::
Third-party code accounts for 76% of page weight (2.3 MiB of 3.0 MiB)
Info::
Third-party blocking time is low (0 ms)
24%
76%
First-party Third-party
F
JS Execution Cost
Action
9671ms total JS execution
FIX
9671ms total JS execution
Warning::
Unattributable: 1757ms CPU time
Warning::
https://www.ebay.com/: 1746ms CPU time
Warning::
https://www.ebay.com/ifh/ifh-vendor6745c0450bef4bd...: 1245ms CPU time
Warning::
https://ir.ebaystatic.com/cr/v/c1/globalheader_wid...: 578ms CPU time
Warning::
https://ir.ebaystatic.com/rs/c/mweb-gh-ImW4WXaP.js: 514ms CPU time
Warning::
Third-party scripts: 6147ms (64% of total)

Main Thread Breakdown

Script Evaluation 55% Other 20% Script Parsing & Compilation 11% Style & Layout 8% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
Unattributable1757ms239ms0ms3rd
https://www.ebay.com/1746ms1075ms166ms1st
https://www.ebay.com/ifh/ifh-vendor6745c0450bef4bd655ad.js1245ms1082ms124ms1st
https://ir.ebaystatic.com/cr/v/c1/globalheader_widget_platform__v2-dbe28938b2023.js578ms244ms197ms3rd
https://ir.ebaystatic.com/rs/c/mweb-gh-ImW4WXaP.js514ms109ms75ms3rd
https://www.ebay.com/buyer-preferences/shipping-address?entryPageId=4624852483ms225ms54ms1st
https://www.googletagmanager.com/gtag/js?id=AW-1070599711&cx=c&gtm=4e6411h1473ms409ms56ms3rd
https://ir.ebaystatic.com/rs/c/discoveryplatformweb/_Byl6u2YB.js400ms12ms5ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-1005566788&cx=c&gtm=4e6411h1327ms270ms52ms3rd
https://www.googletagmanager.com/gtag/js?id=DC-13341218303ms251ms49ms3rd

Showing top 10 of 26 scripts

F
JS Bundles
Action
76 scripts, 709 KB unused
FIX
76 scripts, 709 KB unused
Warning::
https://ir.ebaystatic.com/rs/c/discoveryplatformwe...: 189 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ebay.com/ifh/ifh-vendor6745c0450bef4bd...: 136 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ir.ebaystatic.com/rs/c/buyerprefs/buyer-pr...: 64 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-107...: 55 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-100...: 55 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 709 KB
709 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ir.ebaystatic.com/rs/c/discoveryplatformweb/_Byl6u2YB.js264 KB189 KB (72%)✓3rd
https://www.ebay.com/ifh/ifh-vendor6745c0450bef4bd655ad.js246 KB136 KB (55%)✓1st
https://ir.ebaystatic.com/rs/c/buyerprefs/buyer-preferences.shipping-address-BafmDCEN.js118 KB64 KB (55%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-1070599711&cx=c&gtm=4e6411h1147 KB55 KB (37%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-1005566788&cx=c&gtm=4e6411h1135 KB55 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-13341218130 KB52 KB (40%)✓3rd
https://connect.facebook.net/en_US/fbevents.js95 KB33 KB (35%)✓3rd
https://www.ebay.com/ifh/ifh72ce1bf332834fe517a2.js76 KB33 KB (44%)✓1st
https://ir.ebaystatic.com/rs/c/buyerprefs/jsx-runtime-BEJwbcy9.js42 KB26 KB (62%)✓3rd
https://ir.ebaystatic.com/cr/v/c01/jquery/jquery-3.7.0.min.js31 KB23 KB (76%)✓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
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.

B
Image Optimization
45 images, 0 KB saveable
REVIEW
45 images, 0 KB saveable
Warning::
https://ir.ebaystatic.com/cr/v/c1/1x1.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
45 images 513 KB
0 oversized -0 KB
20 legacy format
1 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

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
4 fonts (51 KB)
PASS
4 fonts (51 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

51 KB total

Render-blocking

0

of 4

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 FCP 5.3 s LCP 24.2 shttps://ir.ebaystatic.com/cr/v/c1/market-sans/v2.0/MarketSans-Regular-WebS.woff2MarketSans-Regular-WebS... https://ir.ebaystatic.com/cr/v/c1/market-sans/v2.0/MarketSans-Regular-WebS.woff2 — 25.1 KiB — 0 ms — font-display: swaphttps://ir.ebaystatic.com/cr/v/c1/market-sans/v2.0/MarketSans-Bold-WebS.woff2MarketSans-Bold-WebS.woff2 https://ir.ebaystatic.com/cr/v/c1/market-sans/v2.0/MarketSans-Bold-WebS.woff2 — 26.2 KiB — 0 ms — font-display: swaphttps://ir.ebaystatic.com/cr/v/c1/market-sans/v2.0/MarketSans-Regular-WebS.woff2MarketSans-Regular-WebS... https://ir.ebaystatic.com/cr/v/c1/market-sans/v2.0/MarketSans-Regular-WebS.woff2 — 0 B — 0 ms — font-display: swaphttps://ir.ebaystatic.com/cr/v/c1/market-sans/v2.0/MarketSans-Bold-WebS.woff2MarketSans-Bold-WebS.woff2 https://ir.ebaystatic.com/cr/v/c1/market-sans/v2.0/MarketSans-Bold-WebS.woff2 — 0 B — 0 ms — font-display: swap
MarketSans-Regular-WebS... woff2 swap
Size 25 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
MarketSans-Bold-WebS.woff2 woff2 swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
MarketSans-Regular-WebS... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
MarketSans-Bold-WebS.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
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
7 hints, 0 missing preconnects
PASS
7 hints, 0 missing preconnects
Info::
Page uses 7 resource hint(s)

Current Resource Hints

preconnect
2
preload
1
dns-prefetch
4
prefetch
—

7 resource hints configured

Network Waterfall
179 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
64% of JavaScript execution is third-party
First-party Third-party 6147ms · 1236KB · $35/mo
Unattributable
Other
Costly
Execution 1757ms
Transfer 0 KB
Monthly Cost $10/mo
ir.ebaystatic.com
Other
Costly
Execution 578ms
Transfer 0 KB
Monthly Cost $3/mo
ir.ebaystatic.com
Other
Costly
Execution 514ms
Transfer 0 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 473ms
Transfer 147 KB
Unused 37%
Monthly Cost $3/mo
ir.ebaystatic.com
Other
Costly
Execution 400ms
Transfer 264 KB
Unused 72%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 327ms
Transfer 135 KB
Unused 40%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 303ms
Transfer 130 KB
Unused 40%
Monthly Cost $2/mo
ir.ebaystatic.com
Other
Costly
Execution 274ms
Transfer 59 KB
Unused 38%
Monthly Cost $2/mo
ir.ebaystatic.com
Other
Costly
Execution 211ms
Transfer 0 KB
Monthly Cost $1/mo
Facebook Pixel
Advertising
Costly
Execution 204ms
Transfer 95 KB
Unused 35%
Monthly Cost $1/mo
sc-static.net
Other
Optional
Execution 154ms
Transfer 25 KB
Monthly Cost $1/mo
Facebook Pixel
Advertising
Optional
Execution 138ms
Transfer 42 KB
Monthly Cost $1/mo
ir.ebaystatic.com
Other
Optional
Execution 137ms
Transfer 112 KB
Monthly Cost $1/mo
s.pinimg.com
Other
Optional
Execution 109ms
Transfer 28 KB
Monthly Cost $1/mo
ir.ebaystatic.com
Other
Optional
Execution 106ms
Transfer 0 KB
Monthly Cost $1/mo
mkttag.ebay.com
Other
Optional
Execution 89ms
Transfer 19 KB
Monthly Cost $1/mo
dynamic.criteo.com
Other
Optional
Execution 78ms
Transfer 25 KB
Monthly Cost $0/mo
ir.ebaystatic.com
Other
Optional
Execution 63ms
Transfer 74 KB
Monthly Cost $0/mo
ir.ebaystatic.com
Other
Optional
Execution 62ms
Transfer 31 KB
Unused 72%
Monthly Cost $0/mo
www.redditstatic.com
Other
Optional
Execution 62ms
Transfer 19 KB
Monthly Cost $0/mo
ir.ebaystatic.com
Other
Optional
Execution 54ms
Transfer 0 KB
Monthly Cost $0/mo
ir.ebaystatic.com
Other
Optional
Execution 52ms
Transfer 31 KB
Unused 76%
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • Unattributable adds 1757ms and costs ~$10/month
  • ir.ebaystatic.com adds 578ms and costs ~$3/month
  • ir.ebaystatic.com adds 514ms and costs ~$3/month
  • Google Tag Manager adds 473ms and costs ~$3/month
  • ir.ebaystatic.com adds 400ms and costs ~$2/month
  • Google Tag Manager adds 327ms and costs ~$2/month
  • Google Tag Manager adds 303ms and costs ~$2/month
  • ir.ebaystatic.com adds 274ms and costs ~$2/month
  • ir.ebaystatic.com adds 211ms and costs ~$1/month
  • Facebook Pixel adds 204ms and costs ~$1/month

64% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 1757ms 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

ir.ebaystatic.com takes 578ms 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

ir.ebaystatic.com takes 514ms 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

Google Tag Manager takes 473ms 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

ir.ebaystatic.com takes 400ms 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

72% of ir.ebaystatic.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

Google Tag Manager takes 327ms 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

Google Tag Manager takes 303ms 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

ir.ebaystatic.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

ir.ebaystatic.com takes 211ms 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

Facebook Pixel takes 204ms 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

72% of ir.ebaystatic.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

76% of ir.ebaystatic.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

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.

Send Feedback