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Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
2
REVIEW
0
PASS
21
INFO
3

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

Mobile Desktop
86
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.
77
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.

2.69 s

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

3.19 s

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

98 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.

4.62 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.

3.19 s

Page Load Progression

591 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.5 s
4.1 s
4.7 s
Checks
26
21 PASS 2 FIX
D
JS Execution Cost
Action
3093ms total JS execution
FIX
3093ms total JS execution
Warning::
https://nu11cyber.com/assets/index-CAzBENM6.js: 1939ms CPU time
Warning::
https://nu11cyber.com/: 436ms CPU time
Warning::
https://nu11cyber.com/cdn-cgi/challenge-platform/s...: 307ms CPU time
Warning::
Unattributable: 281ms CPU time
Info::
https://unpkg.com/react@18/umd/react.production.mi...: 130ms CPU time
Info::
Third-party scripts: 130ms (4% of total)

Main Thread Breakdown

Other 61% Script Evaluation 24% Style & Layout 10%
ScriptTotalScriptingParse/CompileParty
https://nu11cyber.com/assets/index-CAzBENM6.js1939ms210ms1ms1st
https://nu11cyber.com/436ms71ms24ms1st
https://nu11cyber.com/cdn-cgi/challenge-platform/scripts/jsd/main.js307ms292ms2ms1st
Unattributable281ms21ms0ms1st
https://unpkg.com/react@18/umd/react.production.min.js130ms126ms2ms3rd
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store

DirectiveValueMeaning
no-store—Never cache this response
A+
Page Weight Budget
199 KB transferred, 21 requests
PASS
199 KB transferred, 21 requests
Info::
Page weighs 415 KB (199 KB transferred)
Info::
21 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
199 KB / 2.4 MB budget
199 KB transferred
21 requests
0.04 g CO2 per page load
JavaScript 97.7 KiB 49%
Images 49.1 KiB 25%
Other 28.2 KiB 14%
CSS 13.1 KiB 7%
Other 6.7 KiB 3%
HTML 2.5 KiB 1%
Other 1.8 KiB 1%
0 2.4 MB 4.9 MB
Under budget
A
Third-Party Impact
30% third-party, 0 ms blocking
PASS
30% third-party, 0 ms blocking
Info::
Third-party code accounts for 30% of page weight (58.9 KiB of 198.9 KiB)
Info::
Third-party blocking time is low (0 ms)
70%
30%
First-party Third-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 49 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
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+
JS Bundles
5 scripts, 0 KB unused
PASS
5 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://nu11cyber.com/assets/index-CAzBENM6.js29 KB—✓1st
https://unpkg.com/react-dom@18.3.1/umd/react-dom.production.min.js42 KB—✓3rd
https://unpkg.com/react@18.3.1/umd/react.production.min.js5 KB—✓3rd
https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a1177817227644711 KB—✓3rd
https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/1eec422858ff/main.js?11 KB—✓1st
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+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Compression Algorithm
Main response uses brotli
PASS
Main response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
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::
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
21 resources · 199 KB · 0 KB savings available
PASS
21 resources · 199 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 199 KB
Info::
5 third-party resources (30% of weight)
21 resources · 198.9 KiB · 5 third-party Within 1MB page-weight target
JavaScript 49% · 97.7 KiB
Image 38% · 75.3 KiB
CSS 7% · 13.1 KiB
Other 5% · 10.4 KiB
Document 1% · 2.5 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
2 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.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
21 requests over 1665ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.7 s LCP 3.2 shttps://nu11cyber.com// https://nu11cyber.com/ — 200 — 2.5 KiB — 187 ms — h2https://nu11cyber.com/cdn-cgi/speculation/cdn-cgi/speculation https://nu11cyber.com/cdn-cgi/speculation — 200 — 1.1 KiB — 12 ms — h2https://unpkg.com/react@18/umd/react.production.min.jsunpkg.com/react@18/umd/react.produc... https://unpkg.com/react@18/umd/react.production.min.js — 302 — 271 B — 195 ms — h3https://unpkg.com/react-dom@18/umd/react-dom.production.min.jsunpkg.com/react-dom@18/umd/react-do... https://unpkg.com/react-dom@18/umd/react-dom.production.min.js — 302 — 314 B — 138 ms — h3https://nu11cyber.com/assets/index-CAzBENM6.js/assets/index-CAzBENM6.js https://nu11cyber.com/assets/index-CAzBENM6.js — 200 — 28.7 KiB — 614 ms — h2https://nu11cyber.com/assets/style-DdtoMpod.css/assets/style-DdtoMpod.css https://nu11cyber.com/assets/style-DdtoMpod.css — 200 — 13.1 KiB — 658 ms — h2https://unpkg.com/react-dom@18.3.1/umd/react-dom.production.min.jsunpkg.com/react-dom@18.3.1/umd/reac... https://unpkg.com/react-dom@18.3.1/umd/react-dom.production.min.js — 200 — 42.3 KiB — 77 ms — h3https://unpkg.com/react@18.3.1/umd/react.production.min.jsunpkg.com/react@18.3.1/umd/react.pr... https://unpkg.com/react@18.3.1/umd/react.production.min.js — 200 — 4.6 KiB — 27 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447 — 200 — 11.4 KiB — 31 ms — h2https://nu11cyber.com/cdn-cgi/challenge-platform/scripts/jsd/main.js/cdn-cgi/challenge-platform/scripts... https://nu11cyber.com/cdn-cgi/challenge-platform/scripts/jsd/main.js — 302 — 259 B — 66 ms — h3https://nu11cyber.com/nu11-logo-transparent.png/nu11-logo-transparent.png https://nu11cyber.com/nu11-logo-transparent.png — 200 — 49.1 KiB — 762 ms — h3https://nu11cyber.com/cdn-cgi/rum?/cdn-cgi/rum? https://nu11cyber.com/cdn-cgi/rum? — 204 — 1.2 KiB — 9 ms — h3https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/1eec422858ff/main.js?/cdn-cgi/challenge-platform/h/b/scr... https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/1eec422858ff/main.js? — 200 — 10.7 KiB — 14 ms — h3https://nu11cyber.com/n1Cy/v1/auth/refresh/n1Cy/v1/auth/refresh https://nu11cyber.com/n1Cy/v1/auth/refresh — 401 — 1.0 KiB — 189 ms — h3https://nu11cyber.com/nu11-favicon.png/nu11-favicon.png https://nu11cyber.com/nu11-favicon.png — 200 — 26.3 KiB — 632 ms — h3https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/1eec422858ff/0.8761219337898501:1779949289:Z0Zv4gj75N0q-oEGnsSVjiY1mytzbDluAdHslOn_4Bk/a02b74bceabc0c60/cdn-cgi/challenge-platform/h/b/jsd... https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/1eec422858ff/0.8761219337898501:1779949289:Z0Zv4gj75N0q-oEGnsSVjiY1mytzbDluAdHslOn_4Bk/a02b74bceabc0c60 — 200 — 624 B — 15 ms — h3https://nu11cyber.com/n1Cy/v1/members/n1Cy/v1/members https://nu11cyber.com/n1Cy/v1/members — 200 — 1.1 KiB — 256 ms — h3https://nu11cyber.com/n1Cy/v1/research/n1Cy/v1/research https://nu11cyber.com/n1Cy/v1/research — 200 — 1.4 KiB — 252 ms — h3https://nu11cyber.com/n1Cy/v1/announcements/n1Cy/v1/announcements https://nu11cyber.com/n1Cy/v1/announcements — 200 — 1.0 KiB — 192 ms — h3https://nu11cyber.com/n1Cy/v1/bookmarks/n1Cy/v1/bookmarks https://nu11cyber.com/n1Cy/v1/bookmarks — 401 — 1.1 KiB — 199 ms — h3https://nu11cyber.com/n1Cy/v1/auth/refresh/n1Cy/v1/auth/refresh https://nu11cyber.com/n1Cy/v1/auth/refresh — 401 — 1.0 KiB — 174 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
4% of JavaScript execution is third-party
First-party Third-party 130ms · 0KB · ¥16/mo
unpkg
CDN
Optional
Execution 130ms
Transfer 0 KB
Monthly Cost ¥16/mo

How third-party costs are calculated

Image Optimization
2 images, 97 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

97 KB

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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