https://robuxkinun.com
Performance
· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
94
GRADE
A
FIX
2
REVIEW
2
PASS
19
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
83
100
100
92
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.89 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.84 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
206 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.
2.84 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.
4.22 s
Page Load Progression
543 ms
1.1 s
1.6 s
2.2 s 2.7 s 3.3 s 3.8 s
4.3 sChecks
2619 PASS 2 REVIEW 2 FIX
FJS Execution CostAction4294ms total JS executionFIX
JS Execution Cost
Action4294ms total JS execution
4294ms total JS execution
Warning::
https://robuxkinun.com/: 2029ms CPU time
Warning::
https://robuxkinun.com/_next/static/chunks/08f9fda...: 1615ms CPU time
Warning::
Unattributable: 421ms CPU time
Info::
https://robuxkinun.com/_next/static/chunks/819bcab...: 150ms CPU time
Info::
https://robuxkinun.com/_next/static/chunks/a3cfafc...: 78ms CPU time
Main Thread Breakdown
Script Evaluation 36% Other 26% Style & Layout 20% Rendering 11%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://robuxkinun.com/ | 2029ms | 41ms | 42ms | 1st |
| https://robuxkinun.com/_next/static/chunks/08f9fdaa521f5164.js | 1615ms | 1281ms | 17ms | 1st |
| Unattributable | 421ms | 33ms | 0ms | 1st |
| https://robuxkinun.com/_next/static/chunks/819bcab12784576a.js | 150ms | 146ms | 4ms | 1st |
| https://robuxkinun.com/_next/static/chunks/a3cfafc0b92e4f82.js | 78ms | 27ms | 11ms | 1st |
DHTTP CachingActionno-store (uncacheable)FIX
HTTP Caching
Actionno-store (uncacheable)
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-cache, no-store, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
private, no-cache, no-store, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
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.
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
JavaScript Blocking
2 JS blocking issue(s) detected
2 JS blocking issue(s) detected
Warning::
1 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 4.3 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 Budget611 KB transferred, 50 requestsPASS
Page Weight Budget
611 KB transferred, 50 requests
611 KB transferred, 50 requests
Info::
Page weighs 1.6 MB (611 KB transferred)
Info::
50 HTTP requests
Info::
Estimated 0.13 g CO2 per page load
611 KB transferred
50 requests
0.13 g CO2 per page load
JavaScript 287.6 KiB 47%
Fonts 149.3 KiB 24%
Images 81.7 KiB 13%
HTML 46.9 KiB 8%
CSS 31.5 KiB 5%
Other 10.3 KiB 2%
Other 4.0 KiB 1%
0 2.4 MB 4.9 MB
Under budget
A+Third-Party ImpactNo third-party resourcesPASS
Third-Party Impact
No third-party resources
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Image Optimization15 images, 0 KB saveablePASS
Image Optimization
15 images, 0 KB saveable
15 images, 0 KB saveable
Info::
All images are well-optimized
15 images 82 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+Font Loading3 fonts (149 KB)PASS
Font Loading
3 fonts (149 KB)
3 fonts (149 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
149 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
6ea8d1bb8ea4af7a-s.p.52... woff2 swap
Size 106 KB
Load time 442 ms
Start 189 ms
Risk FOUT — text flashes from fallback to web font
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Pally_Bold-s.p.96a300ad... woff2 swap
Size 21 KB
Load time 445 ms
Start 194 ms
Risk FOUT — text flashes from fallback to web font
Pally_Medium-s.p.8b5688... woff2 swap
Size 22 KB
Load time 496 ms
Start 195 ms
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)
Fixing the unchecked items could save ~53 KB and ~106 ms
A+JS Bundles22 scripts, 33 KB unusedPASS
JS Bundles
22 scripts, 33 KB unused
22 scripts, 33 KB unused
Warning::
https://robuxkinun.com/_next/static/chunks/a3cfafc...: 33 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 33 KB
33 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://robuxkinun.com/_next/static/chunks/a3cfafc0b92e4f82.js | 46 KB | 33 KB (72%) | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/c275d85b7ec01428.js | 10 KB | — | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/62f7f0054c8103b7.js | 15 KB | — | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/08f9fdaa521f5164.js | 58 KB | — | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/c20516c263ef3a09.js | 17 KB | — | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/522518d740397639.js | 9 KB | — | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/turbopack-4769d7ddfb748f3d.js | 4 KB | — | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/ff1a16fafef87110.js | 1 KB | — | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/eab45d022c978f11.js | 8 KB | — | ✓ | 1st |
| https://robuxkinun.com/_next/static/chunks/e4ef67982dea68a6.js | 10 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
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource Hints4 hints, 0 missing preconnectsPASS
Resource Hints
4 hints, 0 missing preconnects
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)
Current Resource Hints
preconnect—
preload 4
dns-prefetch—
prefetch—
4 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
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+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
Document 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 PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: private, no-cache, no-store, max-age=0, must-revalidate
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch,...
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 Inventory50 resources · 611 KB · 33 KB savings availablePASS
Page Weight Inventory
50 resources · 611 KB · 33 KB savings available
50 resources · 611 KB · 33 KB savings available
Info::
Within 1MB page-weight target
Got: 611 KB
Info::
2 third-party resources (0% of weight)
50 resources · 611.2 KiB · 2 third-party Within 1MB page-weight target
JavaScript 47% · 287.6 KiB
Font 24% · 149.3 KiB
Image 14% · 85.6 KiB
Document 8% · 46.9 KiB
CSS 5% · 31.5 KiB
Other 2% · 10.3 KiB
~33.5 KiB of savings available
Remove unused JavaScript: 33.5 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 50 resources | 611.2 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
CSS Performance Depth
No CSS performance depth issues detected
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Asset CompressionNo text asset hosts to measureINFO
Asset Compression
No text asset hosts to measure
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 Waterfall50 requests over 2449msINFO
Network Waterfall
50 requests over 2449ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization19 images, 69 KB total, 0 KB wastedINFO
Image Optimization
19 images, 69 KB total, 0 KB wasted
Image Optimization Audit
Total Images
19
Total Size
69 KB
3 missing dimensions 4 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.