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.

813 ms

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

1.18 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.

1.05 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.

1.18 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

10 PASS 6 REVIEW 2 FIX

Page Weight Budget

Action

11.1 MB transferred, 150 requests

FIX

11.1 MB transferred, 150 requests

Page weighs 13.5 MB (11.1 MB transferred)

Images are 1.1 MB — compress or use modern formats

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

Got: 1.1 MB

150 HTTP requests — consider bundling or reducing

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

Estimated 2.3 g CO2 per page load

11.1 MB transferred

150 requests

2.3 g CO2 per page load

Other 9.4 MiB 84%

Images 1.1 MiB 10%

JavaScript 450.9 KiB 4%

HTML 73.5 KiB 1%

CSS 57.8 KiB 1%

Fonts 53.5 KiB 0%

Other 2.0 KiB 0%

Other 1.8 KiB 0%

Other 849 B 0%

Other 0 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

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

HTTP Caching

Action

No cache headers

FIX

No cache headers

No Cache-Control header found

Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

ETag present — enables conditional (304) responses

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

Image Optimization

53 images, 0 KB saveable

REVIEW

53 images, 0 KB saveable

All images are well-optimized

53 images 1.1 MB

0 oversized -0 KB

4 legacy format

0 missing dimensions CLS risk

JS Execution Cost

955ms total JS execution

REVIEW

955ms total JS execution

https://astrowealth.store/: 631ms CPU time

Unattributable: 228ms CPU time

https://scripts.clarity.ms/0.8.62/clarity.js: 96ms CPU time

Third-party scripts: 324ms (34% of total)

Main Thread Breakdown

Style & Layout 33% Other 32% Script Evaluation 20% Parse HTML & CSS 8% Rendering 5%

Script	Total	Scripting	Parse/Compile	Party
https://astrowealth.store/	631ms	28ms	1ms	1st
Unattributable	228ms	2ms	0ms	3rd
https://scripts.clarity.ms/0.8.62/clarity.js	96ms	85ms	1ms	3rd

Compression Algorithm

Action

Main response served uncompressed

REVIEW

Main response served uncompressed

Main HTML response has no Content-Encoding (uncompressed)

The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.

Main HTML Cache-Control

No Cache-Control header on main HTML response

REVIEW

No Cache-Control header on main HTML response

Main HTML response has no Cache-Control header

Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.

Page Weight Inventory

Action

150 resources · 11.1 MB · 37 KB savings available

REVIEW

150 resources · 11.1 MB · 37 KB savings available

Page weight 11.1 MB exceeds 1 MB target by 10.1 MB

Got: 11.1 MB Expected: ≤ 1 MB

37 third-party resources (4% of weight)

1 resources over 200KB

150 resources · 11.1 MiB · 37 third-party 10.1 MiB over 1MB target

Media 84% · 9.4 MiB

Image 10% · 1.1 MiB

JavaScript 4% · 450.9 KiB

Document 1% · 73.5 KiB

CSS 1% · 57.8 KiB

Font 0% · 53.5 KiB

Other 0% · 2.6 KiB

~36.6 KiB of savings available

Remove unused JavaScript: 36.6 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

150 resources			11.1 MiB

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Third-Party Impact

4% third-party, 0 ms blocking

PASS

4% third-party, 0 ms blocking

Third-party code accounts for 4% of page weight (435.8 KiB of 11.1 MiB)

Third-party blocking time is low (0 ms)

96%

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

7 fonts (54 KB)

PASS

7 fonts (54 KB)

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

Web fonts

54 KB total

Render-blocking

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

poppins_n4.0ba78fa5af9b... woff2 swap

Size 10 KB

Load time 109 ms

Start 766 ms