Performance
· 17 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.
3.58 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.63 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.95 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.069
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.23 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.
24.26 s
Page Load Progression
FPage Weight BudgetAction8.3 MB transferred, 109 requestsFIX
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction6449ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://stores.fun/ | 2282ms | 48ms | 18ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N6K5P45 | 886ms | 780ms | 79ms | 3rd |
| Unattributable | 829ms | 67ms | 0ms | 3rd |
| https://stores.fun/_next/static/chunks/8566-1715ab84d4598d9c.js | 419ms | 352ms | 17ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KQK7MFB3SE&cx=c>m=4e64k0 | 336ms | 291ms | 40ms | 3rd |
| https://connect.facebook.net/signals/config/1464493587850793?v=2.9.303&r=stable&domain=stores.fun&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168%2C228%2C227%2C222%2C224%2C225%2C226%2C223%2C211%2C221%2C193%2C190%2C191%2C185%2C189%2C192%2C188%2C183%2C316%2C196%2C215%2C184%2C182%2C235%2C206%2C176%2C177%2C172%2C178%2C175%2C173%2C174%2C171%2C169%2C180%2C181%2C179%2C265%2C315%2C194%2C238%2C239%2C244%2C241%2C243%2C242%2C240%2C237%2C252%2C248%2C249%2C247%2C253%2C250%2C246%2C251%2C245 | 216ms | 184ms | 23ms | 3rd |
| https://d2nsnh8zt1bpls.cloudfront.net/sdk/4308067269370604370/events.js | 206ms | 163ms | 42ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-11175740559&cx=c>m=4e64k0 | 183ms | 138ms | 44ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-649646477&cx=c>m=4e64k0 | 170ms | 139ms | 31ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-1005403186&cx=c>m=4e64k0 | 165ms | 135ms | 30ms | 3rd |
Showing top 10 of 16 scripts
FJS BundlesAction40 scripts, 613 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/destination?id=AW-649646477&cx=c>m=4e64k0 | 144 KB | 69 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-663378120&cx=c>m=4e64k0 | 145 KB | 69 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-11175740559&cx=c>m=4e64k0 | 144 KB | 69 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-1005403186&cx=c>m=4e64k0 | 145 KB | 68 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-969999375&cx=c>m=4e64k0 | 139 KB | 67 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KQK7MFB3SE&cx=c>m=4e64k0 | 170 KB | 60 KB (35%) | ✓ | 3rd |
| https://d2nsnh8zt1bpls.cloudfront.net/sdk/4308067269370604370/events.js | 145 KB | 55 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N6K5P45 | 194 KB | 47 KB (24%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 34 KB (35%) | ✓ | 3rd |
| https://connect.facebook.net/signals/config/1464493587850793?v=2.9.303&r=stable&domain=stores.fun&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168%2C228%2C227%2C222%2C224%2C225%2C226%2C223%2C211%2C221%2C193%2C190%2C191%2C185%2C189%2C192%2C188%2C183%2C316%2C196%2C215%2C184%2C182%2C235%2C206%2C176%2C177%2C172%2C178%2C175%2C173%2C174%2C171%2C169%2C180%2C181%2C179%2C265%2C315%2C194%2C238%2C239%2C244%2C241%2C243%2C242%2C240%2C237%2C252%2C248%2C249%2C247%2C253%2C250%2C246%2C251%2C245 | 97 KB | 26 KB (27%) | ✓ | 3rd |
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
FPage Weight InventoryAction109 resources · 8.3 MB · 613 KB savings availableFIX
~613.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 109 resources | 8.3 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction29 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
Performance issues directly impact user engagement and conversion rates.
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
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 Loading4 fonts (6043 KB)PASS
Web fonts
4
6043 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~3021 KB and ~6042 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints9 hints, 0 missing preconnectsPASS
Current Resource Hints
9 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall109 requests over 5050msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
stores.fun stores.fun | Other | 2282ms | 23 KB | — | ¥5883/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 886ms | 194 KB | 24% | ¥2284/mo | Costly |
Unattributable Unattributable | Other | 829ms | 0 KB | — | ¥2137/mo | Costly |
stores.fun stores.fun | Other | 419ms | 59 KB | 39% | ¥1081/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 336ms | 170 KB | 35% | ¥865/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 216ms | 97 KB | 27% | ¥556/mo | Costly |
d2nsnh8zt1bpls.cloudfront.net d2nsnh8zt1bpls.cloudfront.net | Other | 206ms | 145 KB | 38% | ¥531/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 183ms | 144 KB | 48% | ¥472/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 170ms | 144 KB | 48% | ¥439/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 165ms | 145 KB | 47% | ¥427/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 161ms | 145 KB | 48% | ¥414/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 157ms | 139 KB | 48% | ¥404/mo | Costly |
stores.fun stores.fun | Other | 146ms | 63 KB | 41% | ¥376/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 118ms | 97 KB | 35% | ¥305/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 116ms | 45 KB | — | ¥298/mo | Costly |
Twitter/X Pixel static.ads-twitter.com | Advertising | 59ms | 13 KB | — | ¥153/mo | Costly |
These scripts may cost more than they're worth
- stores.fun adds 2282ms and costs ~¥5883/month
- Google Tag Manager adds 886ms and costs ~¥2284/month
- Unattributable adds 829ms and costs ~¥2137/month
- stores.fun adds 419ms and costs ~¥1081/month
- Google Tag Manager adds 336ms and costs ~¥865/month
- Facebook Pixel adds 216ms and costs ~¥556/month
- d2nsnh8zt1bpls.cloudfront.net adds 206ms and costs ~¥531/month
- Google Tag Manager adds 183ms and costs ~¥472/month
- Google Tag Manager adds 170ms and costs ~¥439/month
- Google Tag Manager adds 165ms and costs ~¥427/month
- Google Tag Manager adds 161ms and costs ~¥414/month
- Google Tag Manager adds 157ms and costs ~¥404/month
- stores.fun adds 146ms and costs ~¥376/month
- Facebook Pixel adds 118ms and costs ~¥305/month
- Facebook Pixel adds 116ms and costs ~¥298/month
- Twitter/X Pixel adds 59ms and costs ~¥153/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
stores.fun takes 2282ms 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
Google Tag Manager takes 886ms 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 829ms 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
stores.fun takes 419ms 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
Google Tag Manager takes 336ms 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 216ms 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
d2nsnh8zt1bpls.cloudfront.net takes 206ms 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
Google Tag Manager takes 183ms 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
Google Tag Manager takes 170ms 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
Google Tag Manager takes 165ms 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
Google Tag Manager takes 161ms 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
Google Tag Manager takes 157ms 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
stores.fun takes 146ms 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 118ms 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 116ms 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
Twitter/X Pixel takes 59ms 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