Performance
· 25 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.
1.44 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.90 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
944 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.
1.44 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.
4.26 s
Page Load Progression
FJS Execution CostAction4361ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://slacker-qdqs.vercel.app/_next/static/chunks/090clv82waj0s.js | 1760ms | 1364ms | 100ms | 1st |
| Unattributable | 771ms | 10ms | 0ms | 1st |
| https://slacker-qdqs.vercel.app/ | 493ms | 437ms | 14ms | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/07tzi-w2h7_se.js | 364ms | 169ms | 194ms | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/222tl8s80ck2d.js | 360ms | 356ms | 3ms | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/1mo3mg7no8wgo.js | 323ms | 191ms | 75ms | 1st |
| https://slacker-qdqs.vercel.app/sign-in | 232ms | 1ms | 2ms | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/1h6fs7g38kcoa.js | 58ms | 2ms | 55ms | 1st |
DJS BundlesAction28 scripts, 404 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://slacker-qdqs.vercel.app/_next/static/chunks/07tzi-w2h7_se.js | 149 KB | 109 KB (73%) | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/07tzi-w2h7_se.js | 0 KB | 109 KB (73%) | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/1h6fs7g38kcoa.js | 0 KB | 38 KB (100%) | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/1h6fs7g38kcoa.js | 38 KB | 38 KB (100%) | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/090clv82waj0s.js | 72 KB | 30 KB (42%) | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/090clv82waj0s.js | 0 KB | 30 KB (42%) | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/1mo3mg7no8wgo.js | 45 KB | 25 KB (55%) | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/1mo3mg7no8wgo.js | 0 KB | 25 KB (55%) | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/2gxz_t3vigp_a.js | 0 KB | — | ✓ | 1st |
| https://slacker-qdqs.vercel.app/_next/static/chunks/2ucxa66gp0jy_.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
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
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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingpublic, max-age=0, must-revalidateREVIEW
public, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
APage Weight Budget945 KB transferred, 37 requestsPASS
A+Third-Party ImpactNo third-party resourcesPASS
A+Text CompressionAll text resources are compressedPASS
A+Image OptimizationNo images on this pagePASS
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+Document CompressionDocument response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
APage Weight Inventory37 resources · 945 KB · 404 KB savings availablePASS
~403.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 37 resources | 944.9 KiB | ||||||