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

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.

2.10 s

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

2.57 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.

2.10 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.

2.61 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

15 PASS 3 REVIEW 1 FIX

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: no-store, must-revalidate

No ETag or Last-Modified header

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

Cache-Control

no-store, must-revalidate

Directive	Value	Meaning
no-store	—	Never cache this response
must-revalidate	—	Must recheck with server after expiry

Page Weight Budget

Action

1.9 MB transferred, 105 requests

REVIEW

1.9 MB transferred, 105 requests

Page weighs 2.8 MB (1.9 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

105 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.41 g CO2 per page load

1.9 MB transferred

105 requests

0.41 g CO2 per page load

Images 1.6 MiB 81%

JavaScript 257.7 KiB 13%

Other 57.4 KiB 3%

HTML 40.1 KiB 2%

CSS 25.6 KiB 1%

Fonts 2.7 KiB 0%

Other 2.4 KiB 0%

Other 0 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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

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

105 resources · 1.9 MB · 22 KB savings available

REVIEW

105 resources · 1.9 MB · 22 KB savings available

Page weight 1.9 MB exceeds 1 MB target by 969 KB

Got: 1.9 MB Expected: ≤ 1 MB

3 third-party resources (0% of weight)

105 resources · 1.9 MiB · 3 third-party 969.2 KiB over 1MB target

Image 84% · 1.6 MiB

JavaScript 13% · 257.7 KiB

Document 2% · 40.1 KiB

CSS 1% · 25.6 KiB

Font 0% · 2.7 KiB

Other 0% · 2.4 KiB

~21.7 KiB of savings available

Remove unused JavaScript: 21.7 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

105 resources			1.9 MiB

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 (4.1 KiB of 1.9 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

43 images, 0 KB saveable

PASS

43 images, 0 KB saveable

https://musicvideoai.pro/imgs/musicvideoai/1.webp is missing width/height — may cause layout shift