Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
581 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.02 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
242 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.51 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.
2.05 s
Page Load Progression
DJS Execution CostAction2344ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://aiagentskills.net/ | 1072ms | 28ms | 23ms | 1st |
| https://aiagentskills.net/_next/static/chunks/5836-0e5a888f783c31ea.js | 579ms | 217ms | 6ms | 1st |
| Unattributable | 298ms | 28ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-3TLPF2VC0M | 143ms | 113ms | 23ms | 3rd |
| https://aiagentskills.net/_next/static/chunks/webpack-7f2d1d189df53256.js | 103ms | 102ms | 1ms | 1st |
| https://aiagentskills.net/cdn-cgi/challenge-platform/scripts/jsd/main.js | 94ms | 89ms | 1ms | 1st |
| https://aiagentskills.net/_next/static/chunks/5cd64b6a-f0b5ace5478f67ee.js | 55ms | 28ms | 9ms | 1st |
DHTTP CachingActionno-store (uncacheable)FIX
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 |
BThird-Party Impact55% third-party, 0 ms blockingREVIEW
BImage Optimization39 images, 0 KB saveableREVIEW
BJS Bundles27 scripts, 142 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://accounts.google.com/gsi/client | 99 KB | 74 KB (75%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-3TLPF2VC0M | 169 KB | 68 KB (40%) | ✓ | 3rd |
| https://aiagentskills.net/_next/static/chunks/7337-8948fabbc8c4200f.js | 16 KB | — | ✓ | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 | 11 KB | — | ✓ | 3rd |
| https://aiagentskills.net/_next/static/chunks/main-app-121cba408599cb0b.js | 1 KB | — | ✓ | 1st |
| https://aiagentskills.net/_next/static/chunks/2030-d819de2dcaf03ec9.js | 3 KB | — | ✓ | 1st |
| https://aiagentskills.net/_next/static/chunks/app/layout-39ec439b89327ea9.js | 9 KB | — | ✓ | 1st |
| https://aiagentskills.net/_next/static/chunks/7929-967f882f26c8c47c.js | 8 KB | — | ✓ | 1st |
| https://aiagentskills.net/_next/static/chunks/app/error-639079d624bad474.js | 3 KB | — | ✓ | 1st |
| https://aiagentskills.net/_next/static/chunks/481-a77e496ad1992c66.js | 4 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
CCompression AlgorithmActionMain response served uncompressedREVIEW
APage Weight Budget904 KB transferred, 166 requestsPASS
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
A+Text CompressionAll text resources are compressedPASS
A+Font LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
APage Weight Inventory166 resources · 904 KB · 142 KB savings availablePASS
~141.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 166 resources | 904.3 KiB | ||||||
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall166 requests over 5763msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 143ms | 169 KB | 40% | €2/mo | Optional |
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-07-28 — 2026-08-24)
LCP (p75)
4364 ms
53% good
INP (p75)
76 ms
98% good
CLS (p75)
0.000
100% good
FCP (p75)
4169 ms
TTFB (p75)
4270 ms
Image Optimization58 images, 0 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
58
Total Size
0 KB