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https://vitejs.dev

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
3
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
90
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.

811 ms

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

1.23 s

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

206 ms

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.

1.06 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.

1.72 s

Page Load Progression

531 ms
1.1 s
1.6 s
2.1 s
2.7 s
3.2 s
3.7 s
4.2 s
Checks
14
6 PASS 3 REVIEW 3 FIX
D
Page Weight Budget
Action
2.1 MB transferred, 108 requests
FIX
2.1 MB transferred, 108 requests
Info::
Page weighs 3.6 MB (2.1 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::
108 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.43 g CO2 per page load
2.1 MB / 2.4 MB budget
2.1 MB transferred
108 requests
0.43 g CO2 per page load
Images 1.2 MiB 59%
Other 386.4 KiB 18%
Fonts 184.0 KiB 9%
JavaScript 135.9 KiB 6%
Other 97.7 KiB 5%
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

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 (2.1 MiB of 2.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2437ms total JS execution
FIX
2437ms total JS execution
Warning::
https://vite.dev/assets/index.md.DHMIRVbV.lean.js: 1411ms CPU time
Warning::
Unattributable: 495ms CPU time
Warning::
https://vite.dev/: 457ms CPU time
Info::
https://vite.dev/assets/chunks/client.CPtIGuYZ.js: 74ms CPU time
Warning::
Third-party scripts: 2437ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 29% Style & Layout 13% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://vite.dev/assets/index.md.DHMIRVbV.lean.js1411ms1003ms2ms3rd
Unattributable495ms191ms0ms3rd
https://vite.dev/457ms18ms8ms3rd
https://vite.dev/assets/chunks/client.CPtIGuYZ.js74ms26ms0ms3rd
C
Image Optimization
Action
68 images, 0 KB saveable
REVIEW
68 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/stripe.svg 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/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/linear.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/trusted-by/wiz.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://vite.dev/assets/vite-light.t8GCa_VF.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
68 images 1.2 MB
0 oversized -0 KB
38 legacy format
8 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

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
4 fonts (184 KB)
PASS
4 fonts (184 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

184 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 500 ms 1.0 s FCP 811 ms LCP 1.2 shttps://vite.dev/assets/KHTekaMono-Medium.CxAWoJPq.woff2KHTekaMono-Medium.CxAWo... https://vite.dev/assets/KHTekaMono-Medium.CxAWoJPq.woff2 — 40.2 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: 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/KHTekaMono-Regular.CiZ9ZkmZ.woff2KHTekaMono-Regular.CiZ9... https://vite.dev/assets/KHTekaMono-Regular.CiZ9ZkmZ.woff2 — 40.1 KiB — 0 ms — font-display: swap
KHTekaMono-Medium.CxAWo... woff2 swap
Size 40 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
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
KHTekaMono-Regular.CiZ9... woff2 swap
Size 40 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
23 scripts, 0 KB unused
PASS
23 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://vite.dev/assets/app.DzB975AE.js18 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.js10 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
108 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 2437ms · 60KB · $32/mo
vite.dev
Other
Costly
Execution 1411ms
Transfer 38 KB
Monthly Cost $19/mo
Unattributable
Other
Costly
Execution 495ms
Transfer 0 KB
Monthly Cost $7/mo
vite.dev
Other
Costly
Execution 457ms
Transfer 13 KB
Monthly Cost $6/mo
vite.dev
Other
Optional
Execution 74ms
Transfer 10 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • vite.dev adds 1411ms and costs ~$19/month
  • Unattributable adds 495ms and costs ~$7/month
  • vite.dev adds 457ms and costs ~$6/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 1411ms 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 495ms 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 457ms 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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