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Performance

· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
6
PASS
13
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

332 ms

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

372 ms

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.

498 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.

372 ms

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
21
13 PASS 6 REVIEW
B
JS Bundles
4 scripts, 0 KB unused
REVIEW
4 scripts, 0 KB unused
Warning::
https://celebrai-ai-event.hatchable.site/__hatchab...: unminified — 3 KB could be saved
Warning::
https://celebrai-ai-event.hatchable.site/core.js?v...: unminified — 3 KB could be saved
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://celebrai-ai-event.hatchable.site/__hatchable/config.js?v=217 KB—✗1st
https://celebrai-ai-event.hatchable.site/__hatchable/badge.js?v=21&b=11 KB—✓1st
https://celebrai-ai-event.hatchable.site/core.js?v=0e596051593e13 KB—✗1st
https://celebrai-ai-event.hatchable.site/app.js?v=e8c2d5b7c20e8 KB—✓1st
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
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.
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
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.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
no-cache, private
REVIEW
no-cache, private
Info::
Cache-Control header is set
Got: no-cache, private
Info::
ETag present — enables conditional (304) responses
Cache-Control

no-cache, private

DirectiveValueMeaning
no-cache—Cache but always revalidate first
private—Only browser cache, not CDN/proxy
A+
Page Weight Budget
38 KB transferred, 8 requests
PASS
38 KB transferred, 8 requests
Info::
Page weighs 107 KB (38 KB transferred)
Info::
8 HTTP requests
Info::
Estimated 0.01 g CO2 per page load
38 KB / 2.4 MB budget
38 KB transferred
8 requests
0.01 g CO2 per page load
JavaScript 29.3 KiB 76%
HTML 5.1 KiB 13%
CSS 3.5 KiB 9%
Other 508 B 1%
Images 0 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Image Optimization
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Style & Layout 44% Other 35% Script Evaluation 10% Rendering 4% Script Parsing & Compilation 3% Parse HTML & CSS 3%
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
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
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache, private
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
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).
Info::
`ETag` present -- conditional GET supported
A+
Page Weight Inventory
8 resources · 38 KB · 0 KB savings available
PASS
8 resources · 38 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 38 KB
Info::
1 third-party resources (0% of weight)
8 resources · 38.4 KiB · 1 third-party Within 1MB page-weight target
JavaScript 76% · 29.3 KiB
Document 13% · 5.1 KiB
CSS 9% · 3.5 KiB
Other 1% · 508 B
Image 0% · 0 B
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
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
8 requests over 730ms
INFO
0 ms 200 ms 400 ms 600 ms FCP 332 ms LCP 372 mshttps://celebrai-ai-event.hatchable.site/?utm_source=chatgpt.com/?utm_source=chatgpt.com https://celebrai-ai-event.hatchable.site/?utm_source=chatgpt.com — 200 — 5.1 KiB — 311 ms — http/1.1https://celebrai-ai-event.hatchable.site/__hatchable/config.js?v=21/__hatchable/config.js?v=21 https://celebrai-ai-event.hatchable.site/__hatchable/config.js?v=21 — 200 — 7.3 KiB — 111 ms — http/1.1https://celebrai-ai-event.hatchable.site/__hatchable/badge.js?v=21&b=1/__hatchable/badge.js?v=21&b=1 https://celebrai-ai-event.hatchable.site/__hatchable/badge.js?v=21&b=1 — 200 — 1.4 KiB — 114 ms — http/1.1https://celebrai-ai-event.hatchable.site/style.css?v=a944c5b77251/style.css?v=a944c5b77251 https://celebrai-ai-event.hatchable.site/style.css?v=a944c5b77251 — 200 — 3.5 KiB — 211 ms — http/1.1https://celebrai-ai-event.hatchable.site/core.js?v=0e596051593e/core.js?v=0e596051593e https://celebrai-ai-event.hatchable.site/core.js?v=0e596051593e — 200 — 13.0 KiB — 103 ms — http/1.1https://celebrai-ai-event.hatchable.site/app.js?v=e8c2d5b7c20e/app.js?v=e8c2d5b7c20e https://celebrai-ai-event.hatchable.site/app.js?v=e8c2d5b7c20e — 200 — 7.6 KiB — 182 ms — http/1.1data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ…data:image/svg+xml;base64,PHN2ZyB4b... data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ… — 200 — 0 B — 0 ms — datahttps://celebrai-ai-event.hatchable.site/favicon.ico/favicon.ico https://celebrai-ai-event.hatchable.site/favicon.ico — 404 — 508 B — 100 ms — http/1.1
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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