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

SEO

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

3.38 s

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

9.50 s

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

87 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.

4.74 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.

9.51 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

12 PASS 9 REVIEW 2 FIX

Third-Party Impact

Action

92% third-party, 0 ms blocking

FIX

92% third-party, 0 ms blocking

Third-party code accounts for 92% of page weight (1.7 MiB of 1.8 MiB)

Third-party blocking time is low (0 ms)

92%

First-party Third-party

Page Weight Inventory

Action

13 resources · 1.8 MB · 62 KB savings available

FIX

13 resources · 1.8 MB · 62 KB savings available

Page weight 1.8 MB exceeds 1 MB target by 861 KB

Got: 1.8 MB Expected: ≤ 1 MB

~62 KB of savings available

9 third-party resources (92% of weight)

3 resources over 200KB

13 resources · 1.8 MiB · 9 third-party 861.2 KiB over 1MB target

Image 87% · 1.6 MiB

JavaScript 7% · 138.4 KiB

Font 5% · 84.9 KiB

CSS 1% · 14.7 KiB

Document 0% · 1.1 KiB

~62.4 KiB of savings available

Remove unused JavaScript: 62.4 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

13 resources			1.8 MiB

Page Weight Budget

Action

1.8 MB transferred, 13 requests

REVIEW

1.8 MB transferred, 13 requests

Page weighs 2.2 MB (1.8 MB transferred)

Images are 1.6 MB — compress or use modern formats

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

Got: 1.6 MB

13 HTTP requests

Estimated 0.39 g CO2 per page load

1.8 MB transferred

13 requests

0.39 g CO2 per page load

Images 1.6 MiB 87%

JavaScript 138.4 KiB 7%

Fonts 84.9 KiB 5%

CSS 14.7 KiB 1%

HTML 1.1 KiB 0%

Other 475 B 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

Image Optimization

6 images, 0 KB saveable

REVIEW

6 images, 0 KB saveable

https://vibe.filesafe.space/1777369715927353913/at... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

6 images 1.6 MB

0 oversized -0 KB

6 legacy format

1 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

JS Execution Cost

709ms total JS execution

REVIEW

709ms total JS execution

https://zayyancoaching.com/assets/index-BlqRubUf.j...: 365ms CPU time

Unattributable: 230ms CPU time

https://zayyancoaching.com/: 114ms CPU time

Main Thread Breakdown

Style & Layout 35% Other 34% Script Evaluation 26%

Script	Total	Scripting	Parse/Compile	Party
https://zayyancoaching.com/assets/index-BlqRubUf.js	365ms	149ms	3ms	1st
Unattributable	230ms	5ms	0ms	1st
https://zayyancoaching.com/	114ms	29ms	0ms	1st

JS Bundles

1 scripts, 62 KB unused

REVIEW

1 scripts, 62 KB unused

https://zayyancoaching.com/assets/index-BlqRubUf.j...: 62 KB unused (45%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 62 KB

62 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://zayyancoaching.com/assets/index-BlqRubUf.js	138 KB	62 KB (45%)	✓	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

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.

Document Compression

Document response uses gzip; brotli would be ~20% smaller

REVIEW

Document response uses gzip; brotli would be ~20% smaller

Main HTML response uses gzip (brotli would be ~20% smaller)

All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.

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

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

REVIEW

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

Cache-Control header is set

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

Last-Modified header present

Cache-Control

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

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first
must-revalidate	—	Must recheck with server after expiry
max-age	0	Cache for 0 seconds

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 (85 KB)

PASS

2 fonts (85 KB)

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

Web fonts

85 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

nuFiD-vYSZviVYUb_rj3ij_... woff2 swap

Size 38 KB

Load time 42 ms

Start 1.1 s

Risk FOUT — text flashes from fallback to web font

UcC73FwrK3iLTeHuS_nVMrM... woff2 swap

Size 47 KB

Load time 49 ms

Start 1.1 s

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+

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-cache -- safe revalidate-on-request policy

PASS

Main HTML uses no-cache -- safe revalidate-on-request policy

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

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: gzip` 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.

`Last-Modified` present -- timestamp-based conditional GET supported

Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.

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

13 requests over 2069ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

8 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

0 KB

Oversized

8 missing dimensions 6 missing lazy loading

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