https://risk-score-1.preview.emergentagent.com

Performance

· 20 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.

348 ms

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

1.40 s

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

134 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.

1.36 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.

1.40 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

13 PASS 4 REVIEW 2 FIX

JS Bundles

Action

3 scripts, 330 KB unused

FIX

3 scripts, 330 KB unused

https://risk-score-1.preview.emergentagent.com/nod...: 330 KB unused (39%)

Consider code splitting or tree shaking to reduce unused code.

https://risk-score-1.preview.emergentagent.com/nod...: unminified — 266 KB could be saved

Total unused JavaScript: 330 KB

330 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://risk-score-1.preview.emergentagent.com/node_modules/expo-router/entry.bundle?platform=web&dev=true&hot=false&lazy=true&transform.routerRoot=app	845 KB	330 KB (39%)	✗	1st
https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447	11 KB	—	✓	3rd
https://risk-score-1.preview.emergentagent.com/cdn-cgi/challenge-platform/h/g/scripts/jsd/825e783f7fae/main.js?	10 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

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, no-cache, must-revalidate

No ETag or Last-Modified header

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

Cache-Control

no-store, no-cache, must-revalidate

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

Page Weight Budget

1.1 MB transferred, 12 requests

REVIEW

1.1 MB transferred, 12 requests

Page weighs 5.2 MB (1.1 MB transferred)

JavaScript is 867 KB — consider code splitting or lazy loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Got: 867 KB

Fonts are 206 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 206 KB

12 HTTP requests

Estimated 0.22 g CO2 per page load

1.1 MB transferred

12 requests

0.22 g CO2 per page load

JavaScript 866.6 KiB 79%

Fonts 206.3 KiB 19%

HTML 10.2 KiB 1%

Other 8.3 KiB 1%

Other 1.4 KiB 0%

Other 1.2 KiB 0%

0 2.4 MB 4.9 MB

Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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

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

REVIEW

Main 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.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Third-Party Impact

1% third-party, 0 ms blocking

PASS

1% third-party, 0 ms blocking

Third-party code accounts for 1% of page weight (11.4 KiB of 1.1 MiB)

Third-party blocking time is low (0 ms)

99%

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+

Image Optimization

No images on this page

PASS

No images on this page

0 images 0 KB

0 oversized -0 KB

0 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

418ms total JS execution

PASS

418ms total JS execution

https://risk-score-1.preview.emergentagent.com/nod...: 359ms CPU time

https://risk-score-1.preview.emergentagent.com/cdn...: 58ms CPU time

Main Thread Breakdown

Script Evaluation 64% Script Parsing & Compilation 20% Other 9% Style & Layout 5%

Script	Total	Scripting	Parse/Compile	Party
https://risk-score-1.preview.emergentagent.com/node_modules/expo-router/entry.bundle?platform=web&dev=true&hot=false&lazy=true&transform.routerRoot=app	359ms	252ms	101ms	1st
https://risk-score-1.preview.emergentagent.com/cdn-cgi/challenge-platform/scripts/jsd/main.js	58ms	56ms	1ms	1st

A+

Font Loading

1 fonts (206 KB)

PASS

1 fonts (206 KB)

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

Web fonts

206 KB total

Render-blocking

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

Ionicons.ttf ttf swap

Size 206 KB

Load time 221 ms

Start 1.8 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

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)

Fixing the unchecked items could save ~165 KB and ~330 ms

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-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: no-store, no-cache, must-revalidate

A+

Server-Timing Observability

4 Server-Timing entries advertised

PASS

4 Server-Timing entries advertised

Server-Timing header advertises 4 timing entries

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.

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+

Page Weight Inventory

12 resources · 1.1 MB · 330 KB savings available

PASS

12 resources · 1.1 MB · 330 KB savings available

Page weight 1.1 MB exceeds 1 MB target by 70 KB

Got: 1.1 MB Expected: ≤ 1 MB

~330 KB of savings available

1 third-party resources (1% of weight)

2 resources over 200KB

12 resources · 1.1 MiB · 1 third-party 70.0 KiB over 1MB target

JavaScript 79% · 866.6 KiB

Font 19% · 206.3 KiB

Document 1% · 10.2 KiB

Image 1% · 7.9 KiB

Other 0% · 3.0 KiB

~329.8 KiB of savings available

Remove unused JavaScript: 329.8 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

12 resources			1.1 MiB

Network Waterfall

12 requests over 1981ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

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

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Learn

Performance

Page Load Progression

Green Hosting

Font loading timeline

Optimization checklist