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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
3
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
34
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

4.08 s

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

8.95 s

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

2.02 s

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

0.024

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

6.30 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.

15.35 s

Page Load Progression

630 ms
1.3 s
1.9 s
2.5 s
3.1 s
3.8 s
4.4 s
5.0 s
Checks
14
7 PASS 2 REVIEW 3 FIX
D
Page Weight Budget
Action
2.1 MB transferred, 160 requests
FIX
2.1 MB transferred, 160 requests
Info::
Page weighs 5.0 MB (2.1 MB transferred)
Warning::
JavaScript is 857 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 857 KB
Warning::
160 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.44 g CO2 per page load
2.1 MB / 2.4 MB budget
2.1 MB transferred
160 requests
0.44 g CO2 per page load
JavaScript 856.5 KiB 40%
Images 658.1 KiB 30%
Other 347.7 KiB 16%
Fonts 165.7 KiB 8%
HTML 95.5 KiB 4%
CSS 31.9 KiB 1%
Other 7.7 KiB 0%
Other 2.2 KiB 0%
Other 1.9 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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
95% third-party, 0 ms blocking
FIX
95% third-party, 0 ms blocking
Warning::
Third-party code accounts for 95% of page weight (2.0 MiB of 2.1 MiB)
Info::
Third-party blocking time is low (0 ms)
95%
First-party Third-party
F
JS Execution Cost
Action
12914ms total JS execution
FIX
12914ms total JS execution
Warning::
https://cdn.shopify.com/shopifycloud/world/brochur...: 5848ms CPU time
Warning::
https://www.shopify.com/: 1809ms CPU time
Warning::
Unattributable: 1548ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TZ2...: 1517ms CPU time
Warning::
https://cdn.shopify.com/shopifycloud/world/brochur...: 811ms CPU time
Warning::
Third-party scripts: 11105ms (86% of total)

Main Thread Breakdown

Script Evaluation 59% Other 25% Style & Layout 10%
ScriptTotalScriptingParse/CompileParty
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/react-dom-Dm400Lyn.js5848ms4784ms1ms3rd
https://www.shopify.com/1809ms37ms41ms1st
Unattributable1548ms354ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TZ26LP8&dl=dataLayer1517ms1418ms56ms3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/route-DwapDj1B.js811ms49ms2ms3rd
https://www.googletagmanager.com/gtag/js?id=G-W6NECZNE63&cx=c&gtm=4e6411645ms557ms39ms3rd
https://connect.facebook.net/signals/config/1904241839800487?v=2.9.291&r=stable&domain=www.shopify.com&hme=295b1b33901e14aeab879c0b58f907ef4d5f44fdd19814310771af911c5f6ac8&ex_m=102%2C198%2C147%2C22%2C70%2C71%2C139%2C66%2C65%2C11%2C155%2C88%2C16%2C132%2C124%2C37%2C73%2C76%2C130%2C152%2C157%2C8%2C4%2C5%2C7%2C6%2C3%2C89%2C99%2C158%2C163%2C212%2C60%2C179%2C180%2C53%2C267%2C30%2C72%2C224%2C223%2C222%2C23%2C32%2C101%2C59%2C10%2C61%2C95%2C96%2C97%2C103%2C127%2C31%2C29%2C129%2C126%2C125%2C148%2C74%2C151%2C149%2C150%2C48%2C58%2C120%2C15%2C154%2C43%2C254%2C255%2C253%2C26%2C27%2C28%2C46%2C140%2C75%2C110%2C18%2C20%2C42%2C38%2C40%2C39%2C81%2C90%2C94%2C108%2C138%2C141%2C44%2C109%2C24%2C21%2C116%2C67%2C35%2C143%2C142%2C144%2C135%2C133%2C25%2C34%2C57%2C107%2C153%2C68%2C17%2C145%2C112%2C79%2C64%2C19%2C83%2C84%2C113%2C82%2C33%2C284%2C205%2C194%2C195%2C193%2C287%2C279%2C50%2C206%2C105%2C128%2C78%2C118%2C52%2C45%2C47%2C111%2C117%2C123%2C56%2C62%2C51%2C54%2C98%2C156%2C1%2C121%2C14%2C119%2C12%2C2%2C55%2C91%2C63%2C115%2C87%2C86%2C159%2C160%2C92%2C93%2C9%2C122%2C100%2C49%2C136%2C85%2C77%2C69%2C114%2C104%2C41%2C137%2C0%2C80%2C131%2C134%2C146%2C36%2C106%2C13%2C161%2C221%2C220%2C215%2C217%2C218%2C219%2C216%2C204%2C214%2C186%2C183%2C184%2C178%2C182%2C185%2C181%2C176%2C307%2C269%2C189%2C208%2C177%2C175%2C227%2C199%2C169%2C170%2C165%2C171%2C168%2C166%2C167%2C164%2C162%2C173%2C174%2C172%2C256%2C306%2C187247ms226ms13ms3rd
https://connect.facebook.net/en_US/fbevents.js167ms132ms33ms3rd
https://snap.licdn.com/li.lms-analytics/insight.min.js132ms68ms38ms3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/chunk-AO6B54DI-Cr92Q91N.js111ms94ms0ms3rd

Showing top 10 of 11 scripts

B
Image Optimization
61 images, 0 KB saveable
REVIEW
61 images, 0 KB saveable
Info::
All images are well-optimized
61 images 658 KB
0 oversized -0 KB
46 legacy format
0 missing dimensions CLS risk
C
JS Bundles
Action
63 scripts, 232 KB unused
REVIEW
63 scripts, 232 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-W6NE...: 60 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TZ2...: 55 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.shopify.com/shopifycloud/world/brochur...: 38 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://connect.facebook.net/en_US/fbevents.js: 32 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.shopify.com/shopifycloud/world/brochur...: 25 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 232 KB
232 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-W6NECZNE63&cx=c&gtm=4e6411147 KB60 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TZ26LP8&dl=dataLayer166 KB55 KB (33%)✓3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/utils-BdUxjvQA.js43 KB38 KB (88%)✓3rd
https://connect.facebook.net/en_US/fbevents.js95 KB32 KB (34%)✓3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/chunk-JZWAC4HX-CgPBot6T.js35 KB25 KB (71%)✓3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/route-DwapDj1B.js70 KB22 KB (32%)✓3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/useTranslation-BaBJrjZB.js2 KB—✓3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/Close-CHt6mo8p.js1 KB—✓3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/jsx-runtime-qixoEAOq.js1 KB—✓3rd
https://cdn.shopify.com/shopifycloud/world/brochure/production-homepage/assets/constants-CnCHR7n7.js1 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

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

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 (166 KB)
PASS
4 fonts (166 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

166 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 4.1 s LCP 9.0 shttps://cdn.shopify.com/b/shopify-brochure2-assets/5949cd393a8375a896fd0a9b74307666.woff25949cd393a8375a896fd0a9... https://cdn.shopify.com/b/shopify-brochure2-assets/5949cd393a8375a896fd0a9b74307666.woff2 — 66.7 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/b/shopify-brochure2-assets/8e7a81acb91d51d6051bfb7f97e8ecaa.woff28e7a81acb91d51d6051bfb7... https://cdn.shopify.com/b/shopify-brochure2-assets/8e7a81acb91d51d6051bfb7f97e8ecaa.woff2 — 34.4 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/b/shopify-brochure2-assets/5ed4b67d15b44e848aaae29d2e30ec03.woff25ed4b67d15b44e848aaae29... https://cdn.shopify.com/b/shopify-brochure2-assets/5ed4b67d15b44e848aaae29d2e30ec03.woff2 — 31.5 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/b/shopify-brochure2-assets/85640034fdc1068cdb17d5e74ab9876d.woff285640034fdc1068cdb17d5e... https://cdn.shopify.com/b/shopify-brochure2-assets/85640034fdc1068cdb17d5e74ab9876d.woff2 — 33.0 KiB — 0 ms — font-display: swap
5949cd393a8375a896fd0a9... woff2 swap
Size 67 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
8e7a81acb91d51d6051bfb7... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
5ed4b67d15b44e848aaae29... woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
85640034fdc1068cdb17d5e... woff2 swap
Size 33 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
8 hints, 0 missing preconnects
PASS
8 hints, 0 missing preconnects
Info::
Page uses 8 resource hint(s)

Current Resource Hints

preconnect
3
preload
5
dns-prefetch
—
prefetch
—

8 resource hints configured

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

A+
HTTP Caching
max-age=900 (15 minutes)
PASS
max-age=900 (15 minutes)
Info::
Cache-Control header is set
Got: max-age=900, stale-while-revalidate=86400
Info::
Effective TTL: 15 minutes (max-age=900)
Info::
Last-Modified header present
Cache-Control

max-age=900, stale-while-revalidate=86400

DirectiveValueMeaning
max-age900Cache for 15 minutes
stale-while-revalidate86400Serve stale for 1 day while fetching fresh
Effective TTL: 900 seconds
Network Waterfall
160 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
86% of JavaScript execution is third-party
First-party Third-party 11105ms · 608KB · €59/mo
cdn.shopify.com
Other
Costly
Execution 5848ms
Transfer 40 KB
Monthly Cost €31/mo
Unattributable
Other
Costly
Execution 1548ms
Transfer 0 KB
Monthly Cost €8/mo
Google Tag Manager
Tag Manager
Costly
Execution 1517ms
Transfer 166 KB
Unused 33%
Monthly Cost €8/mo
cdn.shopify.com
Other
Costly
Execution 811ms
Transfer 70 KB
Unused 32%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 645ms
Transfer 147 KB
Unused 41%
Monthly Cost €3/mo
Facebook Pixel
Advertising
Costly
Execution 247ms
Transfer 17 KB
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 167ms
Transfer 95 KB
Unused 34%
Monthly Cost €1/mo
LinkedIn Insight
Advertising
Optional
Execution 132ms
Transfer 19 KB
Monthly Cost €1/mo
cdn.shopify.com
Other
Optional
Execution 111ms
Transfer 18 KB
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 79ms
Transfer 37 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • cdn.shopify.com adds 5848ms and costs ~€31/month
  • Unattributable adds 1548ms and costs ~€8/month
  • Google Tag Manager adds 1517ms and costs ~€8/month
  • cdn.shopify.com adds 811ms and costs ~€4/month
  • Google Tag Manager adds 645ms and costs ~€3/month
  • Facebook Pixel adds 247ms and costs ~€1/month

86% 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

cdn.shopify.com takes 5848ms 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 1548ms 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 1517ms 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

cdn.shopify.com takes 811ms 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 645ms 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 247ms 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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