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Performance

· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
94
GRADE
A
FIX
1
REVIEW
1
PASS
17
INFO
2

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

Mobile Desktop
92
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.
73
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.

881 ms

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

1.57 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.

0.050

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.34 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.

1.57 s

Page Load Progression

599 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.6 s
4.2 s
4.8 s
Checks
21
17 PASS 1 REVIEW 1 FIX
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
B
JS Execution Cost
508ms total JS execution
REVIEW
508ms total JS execution
Warning::
https://nu11cyber.com/assets/index-BLLxKUmE.js: 269ms CPU time
Info::
Unattributable: 86ms CPU time
Info::
https://nu11cyber.com/: 84ms CPU time
Info::
https://nu11cyber.com/cdn-cgi/challenge-platform/s...: 70ms CPU time

Main Thread Breakdown

Other 47% Script Evaluation 33% Style & Layout 12% Garbage Collection 3% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://nu11cyber.com/assets/index-BLLxKUmE.js269ms65ms0ms1st
Unattributable86ms6ms0ms1st
https://nu11cyber.com/84ms8ms0ms1st
https://nu11cyber.com/cdn-cgi/challenge-platform/scripts/jsd/main.js70ms65ms0ms1st
A+
Page Weight Budget
334 KB transferred, 29 requests
PASS
334 KB transferred, 29 requests
Info::
Page weighs 553 KB (334 KB transferred)
Info::
29 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
334 KB / 2.4 MB budget
334 KB transferred
29 requests
0.07 g CO2 per page load
Other 151.4 KiB 45%
JavaScript 99.0 KiB 30%
Images 56.4 KiB 17%
CSS 15.1 KiB 5%
HTML 5.0 KiB 2%
Other 4.3 KiB 1%
Other 1.4 KiB 0%
Other 1.1 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
20% third-party, 0 ms blocking
PASS
20% third-party, 0 ms blocking
Info::
Third-party code accounts for 20% of page weight (66.0 KiB of 333.9 KiB)
Info::
Third-party blocking time is low (0 ms)
80%
20%
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
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 56 KB
0 oversized -0 KB
3 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
6 scripts, 0 KB unused
PASS
6 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://unpkg.com/react@18.3.1/umd/react.production.min.js5 KB—✓3rd
https://unpkg.com/react-dom@18.3.1/umd/react-dom.production.min.js42 KB—✓3rd
https://nu11cyber.com/assets/index-BLLxKUmE.js30 KB—✓1st
https://images.dmca.com/Badges/DMCABadgeHelper.min.js0 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?10 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
29 resources · 334 KB · 0 KB savings available
PASS
29 resources · 334 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 334 KB
Info::
8 third-party resources (20% of weight)
29 resources · 333.9 KiB · 8 third-party Within 1MB page-weight target
Image 62% · 206.5 KiB
JavaScript 30% · 99.0 KiB
CSS 5% · 15.1 KiB
Other 2% · 8.2 KiB
Document 2% · 5.0 KiB
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
29 requests over 2477ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 881 ms LCP 1.6 shttps://nu11cyber.com// https://nu11cyber.com/ — 200 — 5.0 KiB — 256 ms — h3https://nu11cyber.com/cdn-cgi/speculation/cdn-cgi/speculation https://nu11cyber.com/cdn-cgi/speculation — 200 — 669 B — 24 ms — h3https://nu11cyber.com/print.css/print.css https://nu11cyber.com/print.css — 200 — 2.0 KiB — 226 ms — h3https://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 — 307 B — 170 ms — h3https://nu11cyber.com/manifest.json/manifest.json https://nu11cyber.com/manifest.json — 200 — 1.4 KiB — 314 ms — h2https://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 — 48 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 — 278 B — 191 ms — h3https://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 — 84 ms — h3https://nu11cyber.com/assets/index-BLLxKUmE.js/assets/index-BLLxKUmE.js https://nu11cyber.com/assets/index-BLLxKUmE.js — 200 — 30.4 KiB — 468 ms — h2https://images.dmca.com/Badges/DMCABadgeHelper.min.jsimages.dmca.com/Badges/DMCABadgeHel... https://images.dmca.com/Badges/DMCABadgeHelper.min.js — -1 — 0 B — 96 ms — https://nu11cyber.com/assets/style-CblivHvO.css/assets/style-CblivHvO.css https://nu11cyber.com/assets/style-CblivHvO.css — 200 — 13.1 KiB — 278 ms — h2https://beavercheck.com/badge?url=https%3A%2F%2Fnu11cyber.combeavercheck.com/badge?url=https%3A%... https://beavercheck.com/badge?url=https%3A%2F%2Fnu11cyber.com — 200 — 1.3 KiB — 68 ms — h2https://images.dmca.com/Badges/dmca_protected_8_120.png?ID=61bc9d91-68a2-4ea3-9c0d-2ecad6b5f54bimages.dmca.com/Badges/dmca_protect... https://images.dmca.com/Badges/dmca_protected_8_120.png?ID=61bc9d91-68a2-4ea3-9c0d-2ecad6b5f54b — 200 — 5.8 KiB — 88 ms — h2https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447 — 200 — 11.4 KiB — 71 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 — 142 B — 77 ms — h2https://nu11cyber.com/nu11-logo-transparent.png/nu11-logo-transparent.png https://nu11cyber.com/nu11-logo-transparent.png — 200 — 49.4 KiB — 635 ms — h2https://nu11cyber.com/cdn-cgi/rum?/cdn-cgi/rum? https://nu11cyber.com/cdn-cgi/rum? — 204 — 366 B — 21 ms — h2https://nu11cyber.com/n1Cy/v1/auth/refresh/n1Cy/v1/auth/refresh https://nu11cyber.com/n1Cy/v1/auth/refresh — 401 — 1.1 KiB — 243 ms — h2https://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 — 10.3 KiB — 21 ms — h2https://nu11cyber.com/nu11-favicon.png/nu11-favicon.png https://nu11cyber.com/nu11-favicon.png — 200 — 26.0 KiB — 446 ms — h2https://nu11cyber.com/nu11-logo-transparent.png/nu11-logo-transparent.png https://nu11cyber.com/nu11-logo-transparent.png — 200 — 49.3 KiB — 749 ms — h2https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/1eec422858ff/0.7195359896902148:1779962830:rJziFGQ9VRWTnrqIyIopK3tDLLk3SqumhQ0CLh3SvrI/a02cbc9ff9d5468e/cdn-cgi/challenge-platform/h/b/jsd... https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/1eec422858ff/0.7195359896902148:1779962830:rJziFGQ9VRWTnrqIyIopK3tDLLk3SqumhQ0CLh3SvrI/a02cbc9ff9d5468e — 200 — 776 B — 38 ms — h2https://nu11cyber.com/n1Cy/v1/members/n1Cy/v1/members https://nu11cyber.com/n1Cy/v1/members — 200 — 1.1 KiB — 258 ms — h2https://nu11cyber.com/n1Cy/v1/research/n1Cy/v1/research https://nu11cyber.com/n1Cy/v1/research — 200 — 369 B — 272 ms — h2https://nu11cyber.com/n1Cy/v1/announcements/n1Cy/v1/announcements https://nu11cyber.com/n1Cy/v1/announcements — 200 — 320 B — 260 ms — h2https://nu11cyber.com/n1Cy/v1/bookmarks/n1Cy/v1/bookmarks https://nu11cyber.com/n1Cy/v1/bookmarks — 401 — 385 B — 248 ms — h2https://nu11cyber.com/favicon.ico/favicon.ico https://nu11cyber.com/favicon.ico — 200 — 25.3 KiB — 411 ms — h2https://nu11cyber.com/n1Cy/v1/auth/refresh/n1Cy/v1/auth/refresh https://nu11cyber.com/n1Cy/v1/auth/refresh — 401 — 1.1 KiB — 231 ms — h2https://nu11cyber.com/nu11-logo-transparent.png/nu11-logo-transparent.png https://nu11cyber.com/nu11-logo-transparent.png — 200 — 49.4 KiB — 241 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
1 images, 25 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

1

Total Size

25 KB

1 missing dimensions
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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