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.

694 ms

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

1.05 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.

965 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.05 s

Page Load Progression

461 ms

922 ms

1.4 s

1.8 s

2.3 s

2.8 s

3.2 s

3.7 s

Checks

13 PASS 6 REVIEW

JS Bundles

7 scripts, 67 KB unused

REVIEW

7 scripts, 67 KB unused

https://agentlucidity.com/assets/index-DXbTkFVp.js: 67 KB unused (50%)

Consider code splitting or tree shaking to reduce unused code.

https://agentlucidity.com/airo-video-slots.js: unminified — 3 KB could be saved

Total unused JavaScript: 67 KB

67 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://agentlucidity.com/assets/index-DXbTkFVp.js	134 KB	67 KB (50%)	✓	1st
https://agentlucidity.com/airo-video-slots.js	6 KB	—	✗	1st
https://agentlucidity.com/airo-logo-orientation.js	2 KB	—	✓	1st
https://agentlucidity.com/assets/query-BF8rksmY.js	12 KB	—	✓	1st
https://agentlucidity.com/assets/react-vendor-DWYk_N8Y.js	2 KB	—	✓	1st
https://agentlucidity.com/assets/radix-ui-DvL_1yzp.js	0 KB	—	✓	1st
https://agentlucidity.com/analytics.js	0 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/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

REVIEW

no-cache

Cache-Control header is set

Got: no-cache

ETag present — enables conditional (304) responses

Cache-Control

no-cache

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first

A+

Page Weight Budget

279 KB transferred, 18 requests

PASS

279 KB transferred, 18 requests

Page weighs 725 KB (279 KB transferred)

18 HTTP requests

Estimated 0.06 g CO2 per page load

279 KB transferred

18 requests

0.06 g CO2 per page load

JavaScript 156.2 KiB 56%

Fonts 78.0 KiB 28%

Images 17.8 KiB 6%

CSS 11.6 KiB 4%

Other 9.8 KiB 4%

HTML 5.5 KiB 2%

Other 580 B 0%

0 2.4 MB 4.9 MB

Under budget

Third-Party Impact

38% third-party, 0 ms blocking

PASS

38% third-party, 0 ms blocking

Third-party code accounts for 38% of page weight (106.5 KiB of 279.5 KiB)

Third-party blocking time is low (0 ms)

62%

38%

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

2 images, 0 KB saveable

PASS

2 images, 0 KB saveable

https://agentlucidity.com/airo-assets/images/logo/... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

2 images 18 KB

0 oversized -0 KB

0 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

A+

JS Execution Cost

67ms total JS execution

PASS

67ms total JS execution

https://agentlucidity.com/assets/index-DXbTkFVp.js: 67ms CPU time

Main Thread Breakdown

Script Evaluation 41% Other 34% Style & Layout 17% Rendering 4%

Script	Total	Scripting	Parse/Compile	Party
https://agentlucidity.com/assets/index-DXbTkFVp.js	67ms	59ms	0ms	1st

A+

Font Loading

2 fonts (78 KB)

PASS

2 fonts (78 KB)

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

Web fonts

78 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

UcC73FwrK3iLTeHuS_nVMrM... woff2 swap

Size 47 KB

Load time 63 ms

Start 1.0 s

Risk FOUT — text flashes from fallback to web font

tDbv2o-flEEny0FZhsfKu5W... woff2 swap

Size 31 KB

Load time 53 ms

Start 1.0 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

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: Origin

The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).

`ETag` present -- conditional GET supported

A+

Page Weight Inventory

18 resources · 279 KB · 67 KB savings available

PASS

18 resources · 279 KB · 67 KB savings available

Within 1MB page-weight target

Got: 279 KB

~67 KB of savings available

5 third-party resources (38% of weight)

18 resources · 279.5 KiB · 5 third-party Within 1MB page-weight target

JavaScript 56% · 156.2 KiB

Font 28% · 78.0 KiB

Image 10% · 27.2 KiB

CSS 4% · 11.6 KiB

Document 2% · 5.9 KiB

Other 0% · 580 B

~67.0 KiB of savings available

Remove unused JavaScript: 67.0 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

18 resources			279.5 KiB

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

18 requests over 1371ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

1 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

0 KB

Oversized

1 missing dimensions

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