https://develop-corporate-site.quiet-sunset-55b2.workers.dev

Performance

· 21 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

SEO

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

839 ms

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

1.04 s

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

0 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.

875 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.04 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

11 PASS 7 REVIEW 1 FIX

Page Weight Budget

Action

2.7 MB transferred, 16 requests

FIX

2.7 MB transferred, 16 requests

Page weighs 3.4 MB (2.7 MB transferred)

Images are 2.4 MB — compress or use modern formats

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

Got: 2.4 MB

16 HTTP requests

Estimated 0.56 g CO2 per page load

2.7 MB transferred

16 requests

0.56 g CO2 per page load

Images 2.4 MiB 92%

JavaScript 131.4 KiB 5%

Fonts 74.0 KiB 3%

CSS 19.3 KiB 1%

HTML 1.4 KiB 0%

Other 539 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

Image Optimization

9 images, 0 KB saveable

REVIEW

9 images, 0 KB saveable

https://develop-corporate-site.quiet-sunset-55b2.w... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

9 images 2.4 MB

0 oversized -0 KB

2 legacy format

2 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

Performance issues directly impact user engagement and conversion rates.

JS Execution Cost

600ms total JS execution

REVIEW

600ms total JS execution

https://develop-corporate-site.quiet-sunset-55b2.w...: 414ms CPU time

https://develop-corporate-site.quiet-sunset-55b2.w...: 107ms CPU time

Unattributable: 79ms CPU time

Main Thread Breakdown

Other 46% Style & Layout 32% Rendering 12% Script Evaluation 10%

Script	Total	Scripting	Parse/Compile	Party
https://develop-corporate-site.quiet-sunset-55b2.workers.dev/	414ms	1ms	0ms	1st
https://develop-corporate-site.quiet-sunset-55b2.workers.dev/assets/index-BAvvfShy.js	107ms	48ms	0ms	1st
Unattributable	79ms	8ms	0ms	1st

JS Bundles

1 scripts, 56 KB unused

REVIEW

1 scripts, 56 KB unused

https://develop-corporate-site.quiet-sunset-55b2.w...: 56 KB unused (43%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 56 KB

56 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://develop-corporate-site.quiet-sunset-55b2.workers.dev/assets/index-BAvvfShy.js	131 KB	56 KB (43%)	✓	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

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

16 resources · 2.7 MB · 56 KB savings available

REVIEW

16 resources · 2.7 MB · 56 KB savings available

Page weight 2.7 MB exceeds 1 MB target by 1.7 MB

Got: 2.7 MB Expected: ≤ 1 MB

~56 KB of savings available

4 third-party resources (3% of weight)

4 resources over 200KB

16 resources · 2.7 MiB · 4 third-party 1.7 MiB over 1MB target

Image 92% · 2.4 MiB

JavaScript 5% · 131.4 KiB

Font 3% · 74.0 KiB

CSS 1% · 19.3 KiB

Document 0% · 1.4 KiB

~55.9 KiB of savings available

Remove unused JavaScript: 55.9 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

16 resources			2.7 MiB

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

No ETag or Last-Modified header

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

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+

Third-Party Impact

3% third-party, 0 ms blocking

PASS

3% third-party, 0 ms blocking

Third-party code accounts for 3% of page weight (76.1 KiB of 2.7 MiB)

Third-party blocking time is low (0 ms)

97%

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

2 fonts (74 KB)

PASS

2 fonts (74 KB)

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

Web fonts

74 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

LDIoaomQNQcsA88c7O9yZ4K... woff2 swap

Size 27 KB

Load time 30 ms

Start 533 ms

Risk FOUT — text flashes from fallback to web font

UcC73FwrK3iLTeHuS_nVMrM... woff2 swap

Size 47 KB

Load time 47 ms

Start 534 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

No optimization needed

PASS

No optimization needed

No resource hint issues

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 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.

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.

Network Waterfall

16 requests over 687ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

18 images, 233 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

233 KB

18 missing dimensions 2 missing lazy loading

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