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

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.

2.46 s

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

15.82 s

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

794 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.

5.37 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.

16.15 s

Page Load Progression

588 ms

1.2 s

1.8 s

2.4 s

2.9 s

3.5 s

4.1 s

4.7 s

Checks

10 PASS 8 REVIEW 5 FIX

Page Weight Budget

Action

20.3 MB transferred, 52 requests

FIX

20.3 MB transferred, 52 requests

Page weighs 21.9 MB (20.3 MB transferred)

Images are 19.8 MB — compress or use modern formats

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

Got: 19.8 MB

52 HTTP requests

Estimated 4.3 g CO2 per page load

20.3 MB transferred

52 requests

4.3 g CO2 per page load

Images 19.8 MiB 98%

JavaScript 343.4 KiB 2%

Other 40.1 KiB 0%

Fonts 26.8 KiB 0%

HTML 20.2 KiB 0%

CSS 14.2 KiB 0%

Other 13.5 KiB 0%

Other 6.2 KiB 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

Third-Party Impact

Action

98% third-party, 0 ms blocking

FIX

98% third-party, 0 ms blocking

Third-party code accounts for 98% of page weight (19.9 MiB of 20.3 MiB)

Third-party blocking time is low (0 ms)

98%

First-party Third-party

JS Execution Cost

Action

7751ms total JS execution

FIX

7751ms total JS execution

https://wealth-os.online/welcome: 3289ms CPU time

https://wealth-os.online/_next/static/chunks/1255-...: 1593ms CPU time

Unattributable: 1029ms CPU time

https://wealth-os.online/_next/static/chunks/4bd1b...: 884ms CPU time

https://static.rocket.new/rocket-web.js?_cfg=https...: 386ms CPU time

Third-party scripts: 386ms (5% of total)

Main Thread Breakdown

Other 35% Script Evaluation 32% Style & Layout 18% Rendering 9% Script Parsing & Compilation 4%

Script	Total	Scripting	Parse/Compile	Party
https://wealth-os.online/welcome	3289ms	11ms	9ms	1st
https://wealth-os.online/_next/static/chunks/1255-e9d6d8fa2063ff23.js	1593ms	1463ms	50ms	1st
Unattributable	1029ms	24ms	0ms	1st
https://wealth-os.online/_next/static/chunks/4bd1b696-16dcc2bec6e1bff8.js	884ms	356ms	31ms	1st
https://static.rocket.new/rocket-web.js?_cfg=https%3A%2F%2Fwealthos2508back.builtwithrocket.new&_be=https%3A%2F%2Fappanalytics.rocket.new&_v=0.1.20	386ms	272ms	1ms	3rd
https://wealth-os.online/_next/static/chunks/6962-09ddab6e9e5dc247.js	273ms	213ms	59ms	1st
https://wealth-os.online/_next/static/chunks/9280-1506feca95eb9ee5.js	234ms	133ms	100ms	1st
https://wealth-os.online/_next/static/chunks/app/welcome/page-6e5630660d61b64a.js	64ms	14ms	43ms	1st

Page Weight Inventory

Action

52 resources · 20.3 MB · 109 KB savings available

FIX

52 resources · 20.3 MB · 109 KB savings available

Page weight 20.3 MB exceeds 1 MB target by 19.3 MB

Got: 20.3 MB Expected: ≤ 1 MB

~109 KB of savings available

21 third-party resources (98% of weight)

10 resources over 200KB

52 resources · 20.3 MiB · 21 third-party 19.3 MiB over 1MB target

Image 98% · 19.8 MiB

JavaScript 2% · 343.4 KiB

Document 0% · 65.2 KiB

Font 0% · 26.8 KiB

CSS 0% · 14.2 KiB

Other 0% · 13.8 KiB

~109.4 KiB of savings available

Remove unused JavaScript: 109.4 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

52 resources			20.3 MiB

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.

No Cache-Control header

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

Image Optimization

12 images, 0 KB saveable

REVIEW

12 images, 0 KB saveable

All images are well-optimized

12 images 19.8 MB

0 oversized -0 KB

10 legacy format

0 missing dimensions CLS risk

JS Bundles

17 scripts, 109 KB unused

REVIEW

17 scripts, 109 KB unused

https://wealth-os.online/_next/static/chunks/9280-...: 70 KB unused (93%)

Consider code splitting or tree shaking to reduce unused code.

https://wealth-os.online/_next/static/chunks/6962-...: 40 KB unused (80%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 109 KB

109 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://wealth-os.online/_next/static/chunks/9280-1506feca95eb9ee5.js	75 KB	70 KB (93%)	✓	1st
https://wealth-os.online/_next/static/chunks/6962-09ddab6e9e5dc247.js	50 KB	40 KB (80%)	✓	1st
https://wealth-os.online/_next/static/chunks/8720-5f65033c1639b71d.js	9 KB	—	✓	1st
https://wealth-os.online/_next/static/chunks/9541-207a4201a87b0191.js	18 KB	—	✓	1st
https://wealth-os.online/_next/static/chunks/main-app-1736bf81b6ae43e6.js	1 KB	—	✓	1st
https://wealth-os.online/_next/static/chunks/44530001-4c43e402a41c8493.js	13 KB	—	✓	1st
https://wealth-os.online/_next/static/chunks/6801-5759e2c0740d76b3.js	4 KB	—	✓	1st
https://wealth-os.online/_next/static/chunks/4bd1b696-16dcc2bec6e1bff8.js	51 KB	—	✓	1st
https://static.rocket.new/rocket-web.js?_cfg=https%3A%2F%2Fwealthos2508back.builtwithrocket.new&_be=https%3A%2F%2Fappanalytics.rocket.new&_v=0.1.20	25 KB	—	✓	3rd
https://wealth-os.online/_next/static/chunks/1255-e9d6d8fa2063ff23.js	42 KB	—	✓	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

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.

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.

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.

JavaScript Blocking

2 JS blocking issue(s) detected

REVIEW

2 JS blocking issue(s) detected

1 render-blocking <script src> tag(s) without async/defer

Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.

Total JS execution time is 7.8 s -- over the 3.5s budget

Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

1 fonts (27 KB)

PASS

1 fonts (27 KB)

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

Web fonts

27 KB total

Render-blocking

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

636a5ac981f94f8b-s.p.woff2 woff2 swap

Size 27 KB

Load time 195 ms

Start 177 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

Resource Hints

14 hints, 0 missing preconnects

PASS

14 hints, 0 missing preconnects

1 font preload(s) missing `crossorigin` -- font will be downloaded twice

Fonts are always fetched as crossorigin=anonymous; a preload without the attribute creates a different cache key, so the browser refetches when the actual font request happens. Sample: /_next/static/media/636a5ac981f94f8b-s.p.woff2. Add `crossorigin` (or `crossorigin="anonymous"`) to each preload.

Page uses 14 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

—

prefetch

—

14 resource hints configured

Why this matters

Performance issues directly impact user engagement and conversion rates.

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+

Server Response Intelligence

1 server-response signal(s) detected

PASS

1 server-response signal(s) detected

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.

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+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

Network Waterfall

52 requests over 2599ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

5% of JavaScript execution is third-party

First-party Third-party 386ms · 25KB · €7/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
static.rocket.new static.rocket.new	Other	386ms	25 KB	—	€7/mo	Costly

static.rocket.new

Other

Costly

Execution 386ms

Transfer 25 KB

Monthly Cost €7/mo

These scripts may cost more than they're worth

static.rocket.new adds 386ms and costs ~€7/month

static.rocket.new takes 386ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

Image Optimization

10 images, 10972 KB total, 10845 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

10972 KB

Oversized

Wasted

10845 KB

6 missing dimensions 9 missing lazy loading

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