Performance

· 22 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.

548 ms

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

548 ms

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.

0.055

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

548 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.

548 ms

Page Load Progression

407 ms

815 ms

1.2 s

1.6 s

2.0 s

2.4 s

2.9 s

3.3 s

Checks

14 PASS 5 REVIEW

Page Weight Budget

1.5 MB transferred, 17 requests

REVIEW

1.5 MB transferred, 17 requests

Page weighs 4.6 MB (1.5 MB transferred)

Images are 1.4 MB — compress or use modern formats

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

Got: 1.4 MB

17 HTTP requests

Estimated 0.32 g CO2 per page load

1.5 MB transferred

17 requests

0.32 g CO2 per page load

Images 1.4 MiB 93%

JavaScript 89.9 KiB 6%

CSS 12.8 KiB 1%

Other 10.2 KiB 1%

Other 1.9 KiB 0%

HTML 1.7 KiB 0%

Other 1.2 KiB 0%

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

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

17 resources · 1.5 MB · 38 KB savings available

REVIEW

17 resources · 1.5 MB · 38 KB savings available

Page weight 1.5 MB exceeds 1 MB target by 560 KB

Got: 1.5 MB Expected: ≤ 1 MB

1 third-party resources (0% of weight)

1 resources over 200KB

17 resources · 1.5 MiB · 1 third-party 559.9 KiB over 1MB target

Image 93% · 1.4 MiB

JavaScript 6% · 89.9 KiB

CSS 1% · 12.8 KiB

Other 1% · 11.4 KiB

Document 0% · 1.7 KiB

~38.2 KiB of savings available

Remove unused JavaScript: 38.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

17 resources			1.5 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

ETag present — enables conditional (304) responses

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

0% third-party, 0 ms blocking

PASS

0% third-party, 0 ms blocking

Third-party code accounts for 0% of page weight (2.4 KiB of 1.5 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

Image Optimization

2 images, 0 KB saveable

PASS

2 images, 0 KB saveable

All images are well-optimized

2 images 1.4 MB

0 oversized -0 KB

2 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

372ms total JS execution

PASS

372ms total JS execution

https://brank.live/: 130ms CPU time

Unattributable: 121ms CPU time

https://brank.live/assets/index-wrqo8EA9.js: 121ms CPU time

Main Thread Breakdown

Other 43% Style & Layout 25% Script Evaluation 24% Rendering 8%

Script	Total	Scripting	Parse/Compile	Party
https://brank.live/	130ms	1ms	0ms	1st
Unattributable	121ms	2ms	0ms	1st
https://brank.live/assets/index-wrqo8EA9.js	121ms	87ms	0ms	1st

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+

JS Bundles

1 scripts, 38 KB unused

PASS

1 scripts, 38 KB unused

https://brank.live/assets/index-wrqo8EA9.js: 38 KB unused (43%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 38 KB

38 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://brank.live/assets/index-wrqo8EA9.js	90 KB	38 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

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+

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.

`ETag` present -- conditional GET supported

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 946ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

2 images, 1463 KB total, 1456 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

1463 KB

Oversized

Wasted

1456 KB

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.