Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

100

Best Practices

100

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.71 s

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

3.77 s

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

66 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.

4.23 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.

3.88 s

Page Load Progression

454 ms

907 ms

1.4 s

1.8 s

2.3 s

2.7 s

3.2 s

3.6 s

Checks

17 PASS 5 REVIEW 1 FIX

JS Execution Cost

Action

3096ms total JS execution

FIX

3096ms total JS execution

https://qevon.vercel.app/assets/index-BwntUfI_.js: 1671ms CPU time

https://qevon.vercel.app/assets/react-vendor-CVwF7...: 687ms CPU time

https://qevon.vercel.app/: 534ms CPU time

Unattributable: 204ms CPU time

Main Thread Breakdown

Other 51% Script Evaluation 29% Style & Layout 14% Rendering 4%

Script	Total	Scripting	Parse/Compile	Party
https://qevon.vercel.app/assets/index-BwntUfI_.js	1671ms	376ms	1ms	1st
https://qevon.vercel.app/assets/react-vendor-CVwF7shJ.js	687ms	502ms	0ms	1st
https://qevon.vercel.app/	534ms	10ms	2ms	1st
Unattributable	204ms	5ms	0ms	1st

JS Bundles

4 scripts, 82 KB unused

REVIEW

4 scripts, 82 KB unused

https://qevon.vercel.app/assets/react-vendor-CVwF7...: 47 KB unused (53%)

Consider code splitting or tree shaking to reduce unused code.

https://qevon.vercel.app/assets/index-BwntUfI_.js: 34 KB unused (49%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 82 KB

82 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://qevon.vercel.app/assets/react-vendor-CVwF7shJ.js	89 KB	47 KB (53%)	✓	1st
https://qevon.vercel.app/assets/index-BwntUfI_.js	70 KB	34 KB (49%)	✓	1st
https://qevon.vercel.app/assets/rolldown-runtime-DF2fYuay.js	1 KB	—	✓	1st
https://qevon.vercel.app/_vercel/insights/script.js	2 KB	—	✓	1st

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

HTTP/3 (QUIC)

HTTP/3 not advertised

REVIEW

HTTP/3 not advertised

HTTP/3 (QUIC) is not advertised

HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.

Server-Timing Observability

No Server-Timing header found

REVIEW

No Server-Timing header found

Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

HTTP Caching

public, max-age=0, must-revalidate

REVIEW

public, max-age=0, must-revalidate

Cache-Control header is set

Got: public, max-age=0, must-revalidate

ETag present — enables conditional (304) responses

Last-Modified header present

Cache-Control

public, max-age=0, must-revalidate

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

A+

Page Weight Budget

523 KB transferred, 17 requests

PASS

523 KB transferred, 17 requests

Page weighs 936 KB (523 KB transferred)

17 HTTP requests

Estimated 0.11 g CO2 per page load

523 KB transferred

17 requests

0.11 g CO2 per page load

Images 240.5 KiB 46%

JavaScript 162.6 KiB 31%

Fonts 103.4 KiB 20%

HTML 8.5 KiB 2%

CSS 7.5 KiB 1%

Other 710 B 0%

Other 175 B 0%

0 2.4 MB 4.9 MB

Under budget

Third-Party Impact

20% third-party, 0 ms blocking

PASS

20% third-party, 0 ms blocking

Third-party code accounts for 20% of page weight (105.1 KiB of 523.5 KiB)

Third-party blocking time is low (0 ms)

80%

20%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Image Optimization

4 images, 0 KB saveable

PASS

4 images, 0 KB saveable

All images are well-optimized

4 images 240 KB

0 oversized -0 KB

1 legacy format

0 missing dimensions CLS risk

A+

Font Loading

4 fonts (103 KB)

PASS

4 fonts (103 KB)

4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

103 KB total

Render-blocking

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

V8mQoQDjQSkFtoMM3T6r8E7... woff2 swap

Size 13 KB

Load time 51 ms

Start 328 ms

Risk FOUT — text flashes from fallback to web font

NGSwv5HMAFg6IuGlBNMjxLs... woff2 swap

Size 44 KB

Load time 111 ms

Start 328 ms

Risk FOUT — text flashes from fallback to web font

NGShv5HMAFg6IuGlBNMjxLs... woff2 swap

Size 23 KB

Load time 109 ms

Start 329 ms

Risk FOUT — text flashes from fallback to web font

xn7gYHE41ni1AdIRggexSvf... woff2 swap

Size 24 KB

Load time 107 ms

Start 329 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

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

2 hints, 0 missing preconnects

PASS

2 hints, 0 missing preconnects

Page uses 2 resource hint(s)

Current Resource Hints

preconnect

preload

—

dns-prefetch

—

prefetch

—

2 resource hints configured

A+

Document Compression

Document response uses brotli

PASS

Document response uses brotli

Main HTML response uses brotli (Content-Encoding: br)

Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Main HTML Cache-Control

Main HTML max-age=0 (≤ 5min) is appropriate

PASS

Main HTML max-age=0 (≤ 5min) is appropriate

Got: public, max-age=0, must-revalidate

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

Compressed response missing `Vary` header

The page is served with `Content-Encoding: br` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.

Both `ETag` and `Last-Modified` present -- efficient revalidation supported

The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).

A+

Page Weight Inventory

17 resources · 523 KB · 82 KB savings available

PASS

17 resources · 523 KB · 82 KB savings available

Within 1MB page-weight target

Got: 523 KB

~82 KB of savings available

5 third-party resources (20% of weight)

17 resources · 523.5 KiB · 5 third-party Within 1MB page-weight target

Image 46% · 241.2 KiB

JavaScript 31% · 162.6 KiB

Font 20% · 103.4 KiB

Document 2% · 8.5 KiB

CSS 1% · 7.5 KiB

Other 0% · 175 B

~81.7 KiB of savings available

Remove unused JavaScript: 81.7 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

17 resources			523.5 KiB

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

A+

JavaScript Blocking

No render-blocking JS or document.write usage detected

PASS

No render-blocking JS or document.write usage detected

No JavaScript blocking issues detected

A+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

Asset Compression

No text asset hosts to measure

INFO

No text asset hosts to measure

No third-party or subdomain host served enough text assets to measure

Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.

Network Waterfall

17 requests over 641ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

4 images, 240 KB total, 224 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

240 KB

Oversized

Wasted

224 KB

4 missing dimensions

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.