Skip to content
https://vitejs.dev

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
2
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
41
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

3.24 s

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

11.37 s

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

1.68 s

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

0.001

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

3.89 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.

11.58 s

Page Load Progression

474 ms
949 ms
1.4 s
1.9 s
2.4 s
2.8 s
3.3 s
3.8 s
Checks
14
6 PASS 4 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.0 MiB of 2.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
11494ms total JS execution
FIX
11494ms total JS execution
Warning::
https://vite.dev/assets/index.md.DHMIRVbV.lean.js: 7841ms CPU time
Warning::
Unattributable: 1846ms CPU time
Warning::
https://vite.dev/: 1479ms CPU time
Info::
https://vite.dev/assets/chunks/client.CPtIGuYZ.js: 200ms CPU time
Info::
https://vite.dev/assets/style.BaItNzON.css: 72ms CPU time
Warning::
Third-party scripts: 11494ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Other 31% Style & Layout 8% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://vite.dev/assets/index.md.DHMIRVbV.lean.js7841ms5351ms1ms3rd
Unattributable1846ms679ms0ms3rd
https://vite.dev/1479ms54ms21ms3rd
https://vite.dev/assets/chunks/client.CPtIGuYZ.js200ms84ms0ms3rd
https://vite.dev/assets/style.BaItNzON.css72ms0ms0ms3rd
https://vite.dev/assets/chunks/FooterNav.Gx_p0gCh.js57ms40ms0ms3rd
C
Page Weight Budget
Action
2.0 MB transferred, 101 requests
REVIEW
2.0 MB transferred, 101 requests
Info::
Page weighs 3.5 MB (2.0 MB transferred)
Warning::
Images are 1.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.2 MB
Warning::
101 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.42 g CO2 per page load
2.0 MB / 2.4 MB budget
2.0 MB transferred
101 requests
0.42 g CO2 per page load
Images 1.2 MiB 61%
Other 386.4 KiB 19%
Fonts 143.8 KiB 7%
JavaScript 136.0 KiB 7%
Other 88.8 KiB 4%
CSS 43.0 KiB 2%
HTML 12.7 KiB 1%
0 2.4 MB 4.9 MB
Approaching limit

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

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.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

C
Image Optimization
Action
65 images, 0 KB saveable
REVIEW
65 images, 0 KB saveable
Warning::
https://vite.dev/trusted-by/openai.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://vite.dev/trusted-by/linear.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://vite.dev/trusted-by/wiz.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://vite.dev/trusted-by/clickup.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://vite.dev/assets/vite-by-voidzero.D7bblMgo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://vite.dev/trusted-by/shopify.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://vite.dev/trusted-by/stripe.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
65 images 1.2 MB
0 oversized -0 KB
37 legacy format
7 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public,max-age=0,must-revalidate
REVIEW
public,max-age=0,must-revalidate
Info::
Cache-Control header is set
Got: public,max-age=0,must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public,max-age=0,must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
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
3 fonts (144 KB)
PASS
3 fonts (144 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

144 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.2 s LCP 11.4 shttps://vite.dev/assets/KHTekaMono-Regular.CiZ9ZkmZ.woff2KHTekaMono-Regular.CiZ9... https://vite.dev/assets/KHTekaMono-Regular.CiZ9ZkmZ.woff2 — 40.1 KiB — 0 ms — font-display: swaphttps://vite.dev/assets/APK-Protocol-Medium.C7Mq9oGh.woff2APK-Protocol-Medium.C7M... https://vite.dev/assets/APK-Protocol-Medium.C7Mq9oGh.woff2 — 37.4 KiB — 0 ms — font-display: swaphttps://vite.dev/assets/inter-roman-latin.Di8DUHzh.woff2inter-roman-latin.Di8DU... https://vite.dev/assets/inter-roman-latin.Di8DUHzh.woff2 — 66.3 KiB — 0 ms — font-display: swap
KHTekaMono-Regular.CiZ9... woff2 swap
Size 40 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
APK-Protocol-Medium.C7M... woff2 swap
Size 37 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
inter-roman-latin.Di8DU... woff2 swap
Size 66 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+
JS Bundles
21 scripts, 0 KB unused
PASS
21 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://vite.dev/assets/app.DzB975AE.js19 KB—✓3rd
https://vite.dev/assets/chunks/plugin-vue_export-helper.B_ZXV7eh.js0 KB—✓3rd
https://vite.dev/assets/chunks/preload-helper.pnuWuzJ7.js1 KB—✓3rd
https://vite.dev/assets/chunks/client.CPtIGuYZ.js9 KB—✓3rd
https://vite.dev/assets/chunks/sponsor.Df-zTICa.js3 KB—✓3rd
https://vite.dev/assets/chunks/FooterNav.Gx_p0gCh.js8 KB—✓3rd
https://vite.dev/assets/chunks/footer-background.W66WtmBO.js0 KB—✓3rd
https://vite.dev/assets/chunks/src.DZwODowt.js10 KB—✓3rd
https://vite.dev/assets/chunks/runtime-core.esm-bundler.C2c7YwqG.js26 KB—✓3rd
https://vite.dev/assets/chunks/runtime-dom.esm-bundler.C6f8mce1.js5 KB—✓3rd
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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
1
preload
1
dns-prefetch
—
prefetch
—

2 resource hints configured

Network Waterfall
101 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
100% of JavaScript execution is third-party
First-party Third-party 11494ms · 111KB · $153/mo
vite.dev
Other
Costly
Execution 7841ms
Transfer 38 KB
Monthly Cost $104/mo
Unattributable
Other
Costly
Execution 1846ms
Transfer 0 KB
Monthly Cost $25/mo
vite.dev
Other
Costly
Execution 1479ms
Transfer 13 KB
Monthly Cost $20/mo
vite.dev
Other
Optional
Execution 200ms
Transfer 9 KB
Monthly Cost $3/mo
vite.dev
Other
Optional
Execution 72ms
Transfer 43 KB
Monthly Cost $1/mo
vite.dev
Other
Optional
Execution 57ms
Transfer 8 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • vite.dev adds 7841ms and costs ~$104/month
  • Unattributable adds 1846ms and costs ~$25/month
  • vite.dev adds 1479ms and costs ~$20/month

100% 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

vite.dev takes 7841ms 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 1846ms 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

vite.dev takes 1479ms 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.

Send Feedback