Performance

· 27 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

100

Accessibility

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.

1.37 s

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

11.91 s

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

244 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.

2.57 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.

12.81 s

Page Load Progression

375 ms

750 ms

1.1 s

1.5 s

1.9 s

2.2 s

2.6 s

3.0 s

Checks

16 PASS 5 REVIEW 2 FIX

Page Weight Budget

Action

4.2 MB transferred, 28 requests

FIX

4.2 MB transferred, 28 requests

Page weighs 5.2 MB (4.2 MB transferred)

Images are 3.8 MB — compress or use modern formats

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

Got: 3.8 MB

28 HTTP requests

Estimated 0.88 g CO2 per page load

4.2 MB transferred

28 requests

0.88 g CO2 per page load

Images 3.8 MiB 90%

JavaScript 320.0 KiB 7%

HTML 50.3 KiB 1%

CSS 29.4 KiB 1%

Other 8.9 KiB 0%

Other 867 B 0%

0 2.4 MB 4.9 MB

Over budget

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

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: private, no-cache, no-store, max-age=0, must-revalidate

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

private, no-cache, no-store, max-age=0, must-revalidate

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

Image Optimization

4 images, 0 KB saveable

REVIEW

4 images, 0 KB saveable

All images are well-optimized

4 images 3.8 MB

0 oversized -0 KB

4 legacy format

0 missing dimensions CLS risk

JS Execution Cost

Action

1895ms total JS execution

REVIEW

1895ms total JS execution

https://seedaud.io/: 753ms CPU time

https://seedaud.io/_next/static/chunks/1255-32f0b2...: 531ms CPU time

Unattributable: 329ms CPU time

https://seedaud.io/_next/static/chunks/4924-dc64fd...: 121ms CPU time

https://accounts.google.com/gsi/client: 95ms CPU time

Third-party scripts: 95ms (5% of total)

Main Thread Breakdown

Script Evaluation 39% Style & Layout 23% Other 22% Script Parsing & Compilation 9% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://seedaud.io/	753ms	30ms	40ms	1st
https://seedaud.io/_next/static/chunks/1255-32f0b2a4c4d3a714.js	531ms	494ms	29ms	1st
Unattributable	329ms	9ms	0ms	1st
https://seedaud.io/_next/static/chunks/4924-dc64fd92a9d76251.js	121ms	116ms	3ms	1st
https://accounts.google.com/gsi/client	95ms	50ms	45ms	3rd
https://seedaud.io/_next/static/chunks/4bd1b696-f785427dddbba9fb.js	65ms	19ms	24ms	1st

JS Bundles

17 scripts, 93 KB unused

REVIEW

17 scripts, 93 KB unused

https://accounts.google.com/gsi/client: 72 KB unused (75%)

Consider code splitting or tree shaking to reduce unused code.

https://seedaud.io/_next/static/chunks/1255-32f0b2...: 20 KB unused (45%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 93 KB

93 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://accounts.google.com/gsi/client	97 KB	72 KB (75%)	✓	3rd
https://seedaud.io/_next/static/chunks/1255-32f0b2a4c4d3a714.js	46 KB	20 KB (45%)	✓	1st
https://seedaud.io/_next/static/chunks/4924-dc64fd92a9d76251.js	4 KB	—	✓	1st
https://seedaud.io/_next/static/chunks/5889-3802aac086dc2541.js	9 KB	—	✓	1st
https://seedaud.io/_next/static/chunks/6091-6bdfcd8c31001171.js	13 KB	—	✓	1st
https://seedaud.io/_next/static/chunks/4707-840002ee52637aa6.js	6 KB	—	✓	1st
https://seedaud.io/_next/static/chunks/1356-e0431919f9b272a7.js	6 KB	—	✓	1st
https://seedaud.io/_next/static/chunks/6199-69bf43d3f1b562f8.js	3 KB	—	✓	1st
https://seedaud.io/_next/static/chunks/webpack-5c044839b60d7a79.js	2 KB	—	✓	1st
https://seedaud.io/_next/static/chunks/main-app-d7ecdd8ea1b11d21.js	1 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

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.

Page Weight Inventory

Action

28 resources · 4.2 MB · 93 KB savings available

REVIEW

28 resources · 4.2 MB · 93 KB savings available

Page weight 4.2 MB exceeds 1 MB target by 3.2 MB

Got: 4.2 MB Expected: ≤ 1 MB

~93 KB of savings available

2 third-party resources (2% of weight)

3 resources over 200KB

28 resources · 4.2 MiB · 2 third-party 3.2 MiB over 1MB target

Image 91% · 3.8 MiB

JavaScript 7% · 320.0 KiB

Document 1% · 50.3 KiB

CSS 1% · 29.4 KiB

Other 0% · 867 B

~92.5 KiB of savings available

Remove unused JavaScript: 92.5 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

28 resources			4.2 MiB

A+

Third-Party Impact

2% third-party, 0 ms blocking

PASS

2% third-party, 0 ms blocking

Third-party code accounts for 2% of page weight (97.3 KiB of 4.2 MiB)

Third-party blocking time is low (0 ms)

98%

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+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

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+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

HTTP/3 (QUIC) is supported

First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.

A+

Compression Algorithm

Main response uses brotli

PASS

Main 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 uses no-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: private, no-cache, no-store, max-age=0, must-revalidate

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch

The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).

No `ETag` or `Last-Modified` -- conditional GET not supported

Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.

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

JavaScript Blocking

1 JS blocking issue(s) detected

PASS

1 JS blocking issue(s) detected

1 render-blocking <script src> tag(s) without async/defer

Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.

A+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall

28 requests over 1547ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

5% of JavaScript execution is third-party

First-party Third-party 95ms · 97KB · kr76/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
accounts.google.com accounts.google.com	Other	95ms	97 KB	75%	kr76/mo	Costly

accounts.google.com

Other

Costly

Execution 95ms

Transfer 97 KB

Unused 75%

Monthly Cost kr76/mo

These scripts may cost more than they're worth

accounts.google.com adds 95ms and costs ~kr76/month

accounts.google.com takes 95ms 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

75% of accounts.google.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

Real-User Performance (CrUX)

Field metrics from the Chrome User Experience Report

INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-06-12 — 2026-07-09)

LCP (p75)

2447 ms

77% good

INP (p75)

96 ms

84% good

CLS (p75)

0.000

99% good

FCP (p75)

2322 ms

TTFB (p75)

1603 ms

This origin passes Core Web Vitals assessment

Image Optimization

41 images, 1101 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

1101 KB

4 missing dimensions 1 missing lazy loading

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

Browse & Analyze

Learn

Performance

Page Load Progression

Green Hosting

These scripts may cost more than they're worth

Chrome User Experience (CrUX)

Image Optimization Audit