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.
28.51 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
32.54 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.02 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
28.51 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.
32.67 s
Page Load Progression
FPage Weight BudgetAction4.6 MB transferred, 75 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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction10445ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://prod.hackster-cdn.online/assets/bundles/client_bundle.73c93d7f2ea47dc836b9.js | 4935ms | 4441ms | 130ms | 3rd |
| https://prod.hackster-cdn.online/assets/bundles/vendors.7ffd3d2946a3b4fa58ea.js | 2345ms | 674ms | 1203ms | 3rd |
| Unattributable | 743ms | 48ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-51VMKPL3HV&cx=c>m=4e64k1 | 431ms | 358ms | 71ms | 3rd |
| https://unpkg.com/survey-core/survey.core.min.js | 425ms | 228ms | 196ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KR3BZMN | 326ms | 191ms | 52ms | 3rd |
| https://prod.hackster-cdn.online/assets/bundles/commons.6b27832902e39e760829.js | 298ms | 10ms | 286ms | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 173ms | 127ms | 45ms | 3rd |
| https://prod.hackster-cdn.online/assets/application-9b6a7fad579cdec3a9e3c733cdcdcb742ff96ff321fcb7b81a21ad56d3fe01ce.js | 163ms | 88ms | 50ms | 3rd |
| https://connect.facebook.net/signals/config/1055054847899682?v=2.9.303&r=stable&domain=www.hackster.io&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 | 160ms | 133ms | 27ms | 3rd |
Showing top 10 of 15 scripts
FJS BundlesAction15 scripts, 2.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://prod.hackster-cdn.online/assets/bundles/vendors.7ffd3d2946a3b4fa58ea.js | 2688 KB | 1656 KB (62%) | ✓ | 3rd |
| https://prod.hackster-cdn.online/assets/bundles/commons.6b27832902e39e760829.js | 396 KB | 220 KB (56%) | ✓ | 3rd |
| https://prod.hackster-cdn.online/assets/bundles/client_bundle.73c93d7f2ea47dc836b9.js | 183 KB | 107 KB (59%) | ✓ | 3rd |
| https://prod.hackster-cdn.online/assets/application-9b6a7fad579cdec3a9e3c733cdcdcb742ff96ff321fcb7b81a21ad56d3fe01ce.js | 98 KB | 70 KB (72%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-51VMKPL3HV&cx=c>m=4e64k1 | 176 KB | 69 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KR3BZMN | 135 KB | 61 KB (45%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 34 KB (35%) | ✓ | 3rd |
| https://unpkg.com/survey-js-ui@2.5.21/survey-js-ui.min.js | 69 KB | — | ✓ | 3rd |
| https://prod.hackster-cdn.online/assets/bundles/analytics.d66a8f8a2750102a1a11.js | 33 KB | — | ✓ | 3rd |
| blob:https://www.hackster.io/ab6aca4d-eb09-49cc-936a-c696d67d0bb1 | -0 KB | — | ✓ | 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 InventoryAction75 resources · 4.6 MB · 2.2 MB savings availableFIX
~2.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 75 resources | 4.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction9 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
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 (144 KB)PASS
Web fonts
4
144 KB total
Render-blocking
0
of 4
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 HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall75 requests over 4182msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
prod.hackster-cdn.online prod.hackster-cdn.online | Other | 4935ms | 183 KB | 59% | €61/mo | Costly |
prod.hackster-cdn.online prod.hackster-cdn.online | Other | 2345ms | 2688 KB | 62% | €29/mo | Costly |
Unattributable Unattributable | Other | 743ms | 0 KB | — | €9/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 431ms | 176 KB | 39% | €5/mo | Costly |
unpkg unpkg.com | CDN | 425ms | 0 KB | — | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 326ms | 135 KB | 45% | €4/mo | Costly |
prod.hackster-cdn.online prod.hackster-cdn.online | Other | 298ms | 396 KB | 56% | €4/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 173ms | 97 KB | 35% | €2/mo | Optional |
prod.hackster-cdn.online prod.hackster-cdn.online | Other | 163ms | 98 KB | 72% | €2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 160ms | 45 KB | — | €2/mo | Optional |
prod.hackster-cdn.online prod.hackster-cdn.online | Other | 125ms | 33 KB | — | €2/mo | Optional |
www.hackster.io www.hackster.io | Other | 115ms | 25 KB | — | €1/mo | Optional |
unpkg unpkg.com | CDN | 72ms | 0 KB | — | €1/mo | Optional |
LinkedIn Insight snap.licdn.com | Advertising | 71ms | 19 KB | — | €1/mo | Optional |
prod.hackster-cdn.online prod.hackster-cdn.online | Other | 63ms | 91 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- prod.hackster-cdn.online adds 4935ms and costs ~€61/month
- prod.hackster-cdn.online adds 2345ms and costs ~€29/month
- Unattributable adds 743ms and costs ~€9/month
- Google Tag Manager adds 431ms and costs ~€5/month
- unpkg adds 425ms and costs ~€5/month
- Google Tag Manager adds 326ms and costs ~€4/month
- prod.hackster-cdn.online adds 298ms and costs ~€4/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
prod.hackster-cdn.online takes 4935ms 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
59% of prod.hackster-cdn.online'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
prod.hackster-cdn.online takes 2345ms 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
62% of prod.hackster-cdn.online'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
Unattributable takes 743ms 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 431ms 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
unpkg takes 425ms 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 326ms 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
prod.hackster-cdn.online takes 298ms 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
56% of prod.hackster-cdn.online'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
72% of prod.hackster-cdn.online'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