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Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
94
GRADE
A
FIX
2
REVIEW
1
PASS
20
INFO
3

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

Mobile Desktop
79
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.

2.78 s

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

3.40 s

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

54 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.142

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

4.49 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.

3.57 s

Page Load Progression

756 ms
1.5 s
2.3 s
3.0 s
3.8 s
4.5 s
5.3 s
6.0 s
Checks
26
20 PASS 1 REVIEW 2 FIX
F
JS Execution Cost
Action
4393ms total JS execution
FIX
4393ms total JS execution
Warning::
https://nu11cyber.com/assets/index-BLLxKUmE.js: 3106ms CPU time
Warning::
https://nu11cyber.com/: 476ms CPU time
Warning::
Unattributable: 373ms CPU time
Warning::
https://nu11cyber.com/cdn-cgi/challenge-platform/s...: 325ms CPU time
Info::
https://unpkg.com/react@18/umd/react.production.mi...: 112ms CPU time
Info::
Third-party scripts: 112ms (3% of total)

Main Thread Breakdown

Other 67% Script Evaluation 20% Style & Layout 9%
ScriptTotalScriptingParse/CompileParty
https://nu11cyber.com/assets/index-BLLxKUmE.js3106ms324ms1ms1st
https://nu11cyber.com/476ms51ms2ms1st
Unattributable373ms30ms0ms1st
https://nu11cyber.com/cdn-cgi/challenge-platform/scripts/jsd/main.js325ms308ms3ms1st
https://unpkg.com/react@18/umd/react.production.min.js112ms109ms1ms3rd
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
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 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.
Warning::
Total JS execution time is 4.4 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A+
Page Weight Budget
340 KB transferred, 29 requests
PASS
340 KB transferred, 29 requests
Info::
Page weighs 554 KB (340 KB transferred)
Info::
29 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
340 KB / 2.4 MB budget
340 KB transferred
29 requests
0.07 g CO2 per page load
Other 154.0 KiB 45%
JavaScript 99.5 KiB 29%
Images 56.7 KiB 17%
CSS 15.2 KiB 4%
Other 7.0 KiB 2%
HTML 5.1 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
19% third-party, 0 ms blocking
PASS
19% third-party, 0 ms blocking
Info::
Third-party code accounts for 19% of page weight (66.0 KiB of 339.9 KiB)
Info::
Third-party blocking time is low (0 ms)
81%
19%
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 57 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?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
29 resources · 340 KB · 0 KB savings available
PASS
29 resources · 340 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 340 KB
Info::
8 third-party resources (19% of weight)
29 resources · 339.9 KiB · 8 third-party Within 1MB page-weight target
Image 61% · 208.8 KiB
JavaScript 29% · 99.5 KiB
CSS 4% · 15.2 KiB
Other 3% · 11.4 KiB
Document 1% · 5.1 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+
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
29 requests over 3733ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.8 s LCP 3.4 shttps://nu11cyber.com// https://nu11cyber.com/ — 200 — 5.1 KiB — 674 ms — h2https://nu11cyber.com/cdn-cgi/speculation/cdn-cgi/speculation https://nu11cyber.com/cdn-cgi/speculation — 200 — 1.1 KiB — 20 ms — h2https://nu11cyber.com/print.css/print.css https://nu11cyber.com/print.css — 200 — 1.2 KiB — 623 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 — 307 B — 182 ms — h3https://nu11cyber.com/manifest.json/manifest.json https://nu11cyber.com/manifest.json — 200 — 1.4 KiB — 271 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 — 35 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 — 157 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 — 76 ms — h3https://nu11cyber.com/assets/index-BLLxKUmE.js/assets/index-BLLxKUmE.js https://nu11cyber.com/assets/index-BLLxKUmE.js — 200 — 30.3 KiB — 915 ms — h3https://nu11cyber.com/assets/style-QBX_CkpW.css/assets/style-QBX_CkpW.css https://nu11cyber.com/assets/style-QBX_CkpW.css — 200 — 13.9 KiB — 914 ms — h3https://images.dmca.com/Badges/DMCABadgeHelper.min.jsimages.dmca.com/Badges/DMCABadgeHel... https://images.dmca.com/Badges/DMCABadgeHelper.min.js — -1 — 0 B — 120 ms — https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447 — 200 — 11.4 KiB — 93 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 — 97 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 — 98 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 — 223 B — 47 ms — h3https://nu11cyber.com/nu11-logo-transparent.png/nu11-logo-transparent.png https://nu11cyber.com/nu11-logo-transparent.png — 200 — 49.6 KiB — 1.0 s — h3https://nu11cyber.com/cdn-cgi/rum?/cdn-cgi/rum? https://nu11cyber.com/cdn-cgi/rum? — 204 — 542 B — 24 ms — h3https://nu11cyber.com/n1Cy/v1/auth/refresh/n1Cy/v1/auth/refresh https://nu11cyber.com/n1Cy/v1/auth/refresh — 401 — 1.1 KiB — 229 ms — h3https://nu11cyber.com/nu11-favicon.png/nu11-favicon.png https://nu11cyber.com/nu11-favicon.png — 200 — 26.8 KiB — 879 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 — 10.9 KiB — 23 ms — h3https://nu11cyber.com/nu11-logo-transparent.png/nu11-logo-transparent.png https://nu11cyber.com/nu11-logo-transparent.png — 200 — 49.6 KiB — 1.2 s — h3https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/1eec422858ff/0.7195359896902148:1779962830:rJziFGQ9VRWTnrqIyIopK3tDLLk3SqumhQ0CLh3SvrI/a02ccd09ce73f0f4/cdn-cgi/challenge-platform/h/b/jsd... https://nu11cyber.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/1eec422858ff/0.7195359896902148:1779962830:rJziFGQ9VRWTnrqIyIopK3tDLLk3SqumhQ0CLh3SvrI/a02ccd09ce73f0f4 — 200 — 627 B — 27 ms — h3https://nu11cyber.com/n1Cy/v1/members/n1Cy/v1/members https://nu11cyber.com/n1Cy/v1/members — 200 — 1.1 KiB — 273 ms — h3https://nu11cyber.com/n1Cy/v1/research/n1Cy/v1/research https://nu11cyber.com/n1Cy/v1/research — 200 — 1.5 KiB — 290 ms — h3https://nu11cyber.com/n1Cy/v1/announcements/n1Cy/v1/announcements https://nu11cyber.com/n1Cy/v1/announcements — 200 — 1.1 KiB — 249 ms — h3https://nu11cyber.com/n1Cy/v1/bookmarks/n1Cy/v1/bookmarks https://nu11cyber.com/n1Cy/v1/bookmarks — 401 — 1.1 KiB — 248 ms — h3https://nu11cyber.com/n1Cy/v1/auth/refresh/n1Cy/v1/auth/refresh https://nu11cyber.com/n1Cy/v1/auth/refresh — 401 — 1.1 KiB — 225 ms — h3https://nu11cyber.com/favicon.ico/favicon.ico https://nu11cyber.com/favicon.ico — 200 — 26.1 KiB — 429 ms — h3https://nu11cyber.com/nu11-logo-transparent.png/nu11-logo-transparent.png https://nu11cyber.com/nu11-logo-transparent.png — 200 — 49.6 KiB — 243 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
3% of JavaScript execution is third-party
First-party Third-party 112ms · 0KB · ¥14/mo
unpkg
CDN
Optional
Execution 112ms
Transfer 0 KB
Monthly Cost ¥14/mo

How third-party costs are calculated

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

Image Optimization Audit

Total Images

4

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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