Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
579 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
0 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 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.
4.26 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.
0 ms
Page Load Progression
FPage Weight BudgetAction3.5 MB transferred, 188 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction3697ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.overstock.com/ygCSE6ve/hsMa9_J/XJp0ivM/5p/baiJtLzrctGwwmJ1/DQdKdDY/FiNWJg9h/IDIB | 708ms | 647ms | 46ms | 3rd |
| Unattributable | 621ms | 88ms | 0ms | 3rd |
| https://www.overstock.com/ygCSE6ve/hsMa9_J/XJp0ivM/5p/fNiJtLYXh7/S2dNdDY/Pgl6WShq/SHgPAg?v=d76c09df-39c1-0448-b19a-5ac5e7dc0214 | 488ms | 455ms | 18ms | 3rd |
| https://www.overstock.com/ | 402ms | 81ms | 15ms | 3rd |
| https://www.overstock.com/interactions/gtm.js?id=GTM-KKD5CDX2 | 328ms | 281ms | 33ms | 3rd |
| https://www.overstock.com/ostk/_next/static/chunks/0-kdcyyxfu6dv.js?dpl=dpl_GAjgh4LA9YkAJxc2U2omssNPBZZD | 246ms | 208ms | 12ms | 3rd |
| https://www.overstock.com/interactions/gtag/js?id=G-SJXPYFJ435&cx=c>m=4e64k0&sign=2ecd2e3ea6310f25496d12f4c04ea5422938f9735c8925911f1433974607a9c1_20260422 | 183ms | 142ms | 19ms | 3rd |
| https://www.overstock.com/ygCSE6ve/hsMa9_J/XJp0ivM/5p/baiJ/Eg49dDY/fkATDSc1/TUAq | 140ms | 99ms | 14ms | 3rd |
| https://cdn.evgnet.com/beacon/c556855555573h9jz3n3n3p091552376/overstock/scripts/evergage.min.js | 104ms | 80ms | 14ms | 3rd |
| https://scripts.clarity.ms/0.8.59/clarity.js | 89ms | 77ms | 4ms | 3rd |
Showing top 10 of 16 scripts
DPage Weight InventoryAction188 resources · 3.5 MB · 0 KB savings availableFIX
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 188 resources | 3.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization89 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font LoadingNo web fonts (system fonts)PASS
A+JS Bundles55 scripts, 0 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://g.3gl.net/jp/13269/latest/InitialLoadScript.js | 23 KB | — | ✓ | 3rd |
| https://www.overstock.com/ygCSE6ve/hsMa9_J/XJp0ivM/5p/baiJtLzrctGwwmJ1/DQdKdDY/FiNWJg9h/IDIB | 183 KB | — | ✓ | 3rd |
| https://www.overstock.com/ostk/_next/static/chunks/0qxyeid5~vb3z.js?dpl=dpl_GAjgh4LA9YkAJxc2U2omssNPBZZD | 14 KB | — | ✓ | 3rd |
| https://www.overstock.com/ostk/_next/static/chunks/0nx1ekq7vixna.js?dpl=dpl_GAjgh4LA9YkAJxc2U2omssNPBZZD | 16 KB | — | ✓ | 3rd |
| https://www.overstock.com/ostk/_next/static/chunks/11k52l7jvov~m.js?dpl=dpl_GAjgh4LA9YkAJxc2U2omssNPBZZD | 20 KB | — | ✓ | 3rd |
| https://www.overstock.com/ostk/_next/static/chunks/0-kdcyyxfu6dv.js?dpl=dpl_GAjgh4LA9YkAJxc2U2omssNPBZZD | 75 KB | — | ✓ | 3rd |
| https://www.overstock.com/ostk/_next/static/chunks/0t12lwhpraczj.js?dpl=dpl_GAjgh4LA9YkAJxc2U2omssNPBZZD | 32 KB | — | ✓ | 3rd |
| https://ds-aksb-a.akamaihd.net/aksb.min.js | 5 KB | — | ✓ | 3rd |
| https://www.overstock.com/ostk/_next/static/chunks/turbopack-03.e7fea48wgt.js?dpl=dpl_GAjgh4LA9YkAJxc2U2omssNPBZZD | 9 KB | — | ✓ | 3rd |
| https://www.overstock.com/ostk/_next/static/chunks/0u9oi3x.tltkd.js?dpl=dpl_GAjgh4LA9YkAJxc2U2omssNPBZZD | 11 KB | — | ✓ | 3rd |
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall188 requests over 8196msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.overstock.com www.overstock.com | Other | 708ms | 1 KB | — | $4/mo | Costly |
Unattributable Unattributable | Other | 621ms | 0 KB | — | $4/mo | Costly |
www.overstock.com www.overstock.com | Other | 488ms | 142 KB | — | $3/mo | Costly |
www.overstock.com www.overstock.com | Other | 402ms | 62 KB | — | $2/mo | Costly |
www.overstock.com www.overstock.com | Other | 328ms | 183 KB | — | $2/mo | Costly |
www.overstock.com www.overstock.com | Other | 246ms | 75 KB | — | $1/mo | Costly |
www.overstock.com www.overstock.com | Other | 183ms | 153 KB | — | $1/mo | Optional |
www.overstock.com www.overstock.com | Other | 140ms | 0 KB | — | $1/mo | Optional |
cdn.evgnet.com cdn.evgnet.com | Other | 104ms | 49 KB | — | $1/mo | Optional |
Microsoft Clarity scripts.clarity.ms | Session Replay | 89ms | 26 KB | — | $1/mo | Optional |
dynamic.criteo.com dynamic.criteo.com | Other | 85ms | 25 KB | — | $0/mo | Optional |
cdn.taboola.com cdn.taboola.com | Other | 66ms | 30 KB | — | $0/mo | Optional |
www.overstock.com www.overstock.com | Other | 64ms | 9 KB | — | $0/mo | Optional |
g.3gl.net g.3gl.net | Other | 61ms | 23 KB | — | $0/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 58ms | 97 KB | — | $0/mo | Optional |
api.consentjs.datagrail.io api.consentjs.datagrail.io | Other | 55ms | 34 KB | — | $0/mo | Optional |
These scripts may cost more than they're worth
- www.overstock.com adds 708ms and costs ~$4/month
- Unattributable adds 621ms and costs ~$4/month
- www.overstock.com adds 488ms and costs ~$3/month
- www.overstock.com adds 402ms and costs ~$2/month
- www.overstock.com adds 328ms and costs ~$2/month
- www.overstock.com adds 246ms and costs ~$1/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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.overstock.com takes 708ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 621ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.overstock.com takes 488ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.overstock.com takes 402ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.overstock.com takes 328ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.overstock.com takes 246ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev