Performance
· 27 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.
4.76 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
17.57 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.35 s
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.
7.32 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.
17.88 s
Page Load Progression
FPage Weight BudgetAction4.0 MB transferred, 346 requestsFIX
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
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
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
FJS Execution CostAction6621ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1841ms | 162ms | 0ms | 1st |
| https://oak-clothing-co.myshopify.com/ | 1127ms | 148ms | 34ms | 1st |
| https://form-assets.mailchimp.com/snippet/account/200702322?site=c274b5d2fe8f5f4f220e49ed7 | 718ms | 420ms | 226ms | 3rd |
| https://oak-clothing-co.myshopify.com/cdn/wpm/b05c62d7ewbe538af9pdeb4fec1me339d55am.js | 649ms | 513ms | 29ms | 1st |
| https://cdn-sf.vitals.app/assets/js/bundle-e532b59a6849458fabfb5e39a21a7c2c.js | 564ms | 374ms | 57ms | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 358ms | 300ms | 55ms | 3rd |
| https://connect.facebook.net/signals/config/2293188614340623?v=2.9.423&r=stable&domain=oak-clothing-co.myshopify.com&im=1&hme=766752a074f0cb0756dd3275a46fdecbcfe3de1ab8f573546734b619e44d384f&ex_m=118%2C241%2C171%2C27%2C82%2C83%2C162%2C78%2C77%2C11%2C181%2C102%2C20%2C153%2C141%2C46%2C85%2C90%2C149%2C176%2C183%2C8%2C4%2C5%2C7%2C6%2C3%2C103%2C115%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C163%2C87%2C126%2C22%2C24%2C51%2C47%2C49%2C48%2C95%2C104%2C108%2C124%2C160%2C164%2C53%2C125%2C29%2C26%2C133%2C79%2C43%2C166%2C165%2C167%2C157%2C155%2C30%2C42%2C66%2C123%2C178%2C80%2C21%2C128%2C93%2C76%2C23%2C97%2C98%2C130%2C96%2C151%2C150%2C154%2C109%2C177%2C180%2C41%2C56%2C127%2C54%2C161%2C72%2C185%2C110%2C184%2C210%2C255%2C84%2C274%2C273%2C272%2C14%2C25%2C28%2C40%2C62%2C117%2C68%2C10%2C73%2C111%2C112%2C113%2C119%2C144%2C38%2C36%2C146%2C147%2C148%2C143%2C142%2C172%2C86%2C175%2C173%2C174%2C57%2C69%2C67%2C137%2C19%2C179%2C52%2C324%2C325%2C326%2C323%2C340%2C362%2C248%2C237%2C70%2C238%2C236%2C365%2C356%2C59%2C249%2C121%2C145%2C92%2C135%2C61%2C134%2C140%2C139%2C65%2C74%2C168%2C88%2C89%2C129%2C44%2C39%2C60%2C63%2C114%2C182%2C1%2C138%2C16%2C136%2C12%2C2%2C64%2C105%2C15%2C75%2C71%2C132%2C101%2C100%2C187%2C188%2C106%2C107%2C9%2C116%2C186%2C58%2C158%2C99%2C91%2C81%2C131%2C120%2C169%2C50%2C159%2C0%2C94%2C152%2C156%2C170%2C45%2C122%2C13%2C189 | 353ms | 294ms | 58ms | 3rd |
| https://oak-clothing-co.myshopify.com/cdn/shop/t/28/assets/theme.min.js?v=126014031971537727391700213147 | 285ms | 135ms | 0ms | 1st |
| https://cdn.one.store/javascript/dist/1.0/jcr-widget-app.4562ee97.js | 249ms | 209ms | 35ms | 3rd |
| https://oak-clothing-co.myshopify.com/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.11.0.min.js | 203ms | 149ms | 12ms | 1st |
Showing top 10 of 13 scripts
DJS BundlesAction212 scripts, 336 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn-sf.vitals.app/assets/js/bundle-e532b59a6849458fabfb5e39a21a7c2c.js | 162 KB | 86 KB (53%) | ✓ | 3rd |
| https://form-assets.mailchimp.com/snippet/account/200702322?site=c274b5d2fe8f5f4f220e49ed7 | 139 KB | 85 KB (61%) | ✓ | 3rd |
| https://connect.facebook.net/signals/config/2293188614340623?v=2.9.423&r=stable&domain=oak-clothing-co.myshopify.com&im=1&hme=766752a074f0cb0756dd3275a46fdecbcfe3de1ab8f573546734b619e44d384f&ex_m=118%2C241%2C171%2C27%2C82%2C83%2C162%2C78%2C77%2C11%2C181%2C102%2C20%2C153%2C141%2C46%2C85%2C90%2C149%2C176%2C183%2C8%2C4%2C5%2C7%2C6%2C3%2C103%2C115%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C163%2C87%2C126%2C22%2C24%2C51%2C47%2C49%2C48%2C95%2C104%2C108%2C124%2C160%2C164%2C53%2C125%2C29%2C26%2C133%2C79%2C43%2C166%2C165%2C167%2C157%2C155%2C30%2C42%2C66%2C123%2C178%2C80%2C21%2C128%2C93%2C76%2C23%2C97%2C98%2C130%2C96%2C151%2C150%2C154%2C109%2C177%2C180%2C41%2C56%2C127%2C54%2C161%2C72%2C185%2C110%2C184%2C210%2C255%2C84%2C274%2C273%2C272%2C14%2C25%2C28%2C40%2C62%2C117%2C68%2C10%2C73%2C111%2C112%2C113%2C119%2C144%2C38%2C36%2C146%2C147%2C148%2C143%2C142%2C172%2C86%2C175%2C173%2C174%2C57%2C69%2C67%2C137%2C19%2C179%2C52%2C324%2C325%2C326%2C323%2C340%2C362%2C248%2C237%2C70%2C238%2C236%2C365%2C356%2C59%2C249%2C121%2C145%2C92%2C135%2C61%2C134%2C140%2C139%2C65%2C74%2C168%2C88%2C89%2C129%2C44%2C39%2C60%2C63%2C114%2C182%2C1%2C138%2C16%2C136%2C12%2C2%2C64%2C105%2C15%2C75%2C71%2C132%2C101%2C100%2C187%2C188%2C106%2C107%2C9%2C116%2C186%2C58%2C158%2C99%2C91%2C81%2C131%2C120%2C169%2C50%2C159%2C0%2C94%2C152%2C156%2C170%2C45%2C122%2C13%2C189 | 157 KB | 45 KB (29%) | ✓ | 3rd |
| https://cdn.one.store/javascript/dist/1.0/jcr-widget-app.4562ee97.js | 81 KB | 45 KB (55%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 112 KB | 38 KB (34%) | ✓ | 3rd |
| https://oak-clothing-co.myshopify.com/cdn/wpm/b05c62d7ewbe538af9pdeb4fec1me339d55am.js | 83 KB | 37 KB (45%) | ✓ | 1st |
| https://oak-clothing-co.myshopify.com/cdn/shopifycloud/checkout-web/assets/c1/164ad2e3.CXOJDbat.js | 185 KB | — | ✓ | 1st |
| https://oak-clothing-co.myshopify.com/cdn/shopifycloud/checkout-web/assets/c1/ca0c3e72.DBrAdBBv.js | 1 KB | — | ✓ | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/loader.init-shop-cart-sync.en.esm.js | 1 KB | — | ✓ | 3rd |
| https://oak-clothing-co.myshopify.com/cdn/shop/t/28/assets/engine-fade-slider.min.js?v=97864358890402062401700213147 | 2 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
CPage Weight InventoryAction346 resources · 4.0 MB · 336 KB savings availableREVIEW
~335.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 346 resources | 4.0 MiB | ||||||
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
AThird-Party Impact25% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization34 images, 0 KB saveablePASS
A+Font Loading3 fonts (60 KB)PASS
Web fonts
3
60 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints166 hints, 0 missing preconnectsPASS
Current Resource Hints
166 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Document CompressionDocument response uses brotliPASS
A+Asset CompressionAll 1 asset host use brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability1 Server-Timing entries advertisedPASS
AServer Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
Network Waterfall346 requests over 7669msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
form-assets.mailchimp.com form-assets.mailchimp.com | Other | 718ms | 139 KB | 61% | $4/mo | Costly |
cdn-sf.vitals.app cdn-sf.vitals.app | Other | 564ms | 162 KB | 53% | $3/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 358ms | 112 KB | 34% | $2/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 353ms | 157 KB | 29% | $2/mo | Costly |
cdn.one.store cdn.one.store | Other | 249ms | 81 KB | 55% | $1/mo | Costly |
cdn.shopify.com cdn.shopify.com | Other | 52ms | 14 KB | — | $0/mo | Optional |
These scripts may cost more than they're worth
- form-assets.mailchimp.com adds 718ms and costs ~$4/month
- cdn-sf.vitals.app adds 564ms and costs ~$3/month
- Facebook Pixel adds 358ms and costs ~$2/month
- Facebook Pixel adds 353ms and costs ~$2/month
- cdn.one.store adds 249ms and costs ~$1/month
form-assets.mailchimp.com takes 718ms 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
61% of form-assets.mailchimp.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
cdn-sf.vitals.app takes 564ms 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
53% of cdn-sf.vitals.app's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Facebook Pixel takes 358ms 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
Facebook Pixel takes 353ms 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
cdn.one.store takes 249ms 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
55% of cdn.one.store's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Image Optimization54 images, 812 KB total, 553 KB wastedINFO
Image Optimization Audit
Total Images
54
Total Size
812 KB
Oversized
16
Wasted
553 KB