Performance
· 17 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.
1.88 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
9.84 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
141.18 s
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.
9.88 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.
179.28 s
Page Load Progression
FJS Execution CostAction175488ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://x.ai/_next/static/chunks/app/(main)/(home)/page-6cce96f1bc8e8a78.js | 168325ms | 7096ms | 8ms | 1st |
| https://x.ai/_next/static/chunks/68314-e8c8ee395511b16c.js | 1698ms | 36ms | 2ms | 1st |
| https://x.ai/_next/static/chunks/38496-f02467fdab6f31b7.js | 1604ms | 1445ms | 66ms | 1st |
| Unattributable | 1020ms | 167ms | 0ms | 3rd |
| https://x.ai/_next/static/chunks/86363-d5d5aa57009dfb70.js | 701ms | 669ms | 31ms | 1st |
| https://x.ai/ | 570ms | 100ms | 22ms | 1st |
| https://x.ai/_next/static/chunks/fc0fe076-c1810b44ae72024a.js | 423ms | 332ms | 88ms | 1st |
| https://x.ai/_next/static/chunks/58927-60d95c5ef94d828a.js | 405ms | 4ms | 8ms | 1st |
| https://x.ai/cdn-cgi/challenge-platform/scripts/jsd/main.js | 379ms | 360ms | 5ms | 1st |
| https://x.ai/_next/static/chunks/23433-19fa66a34c85ea52.js | 128ms | 114ms | 13ms | 1st |
Showing top 10 of 14 scripts
DJS BundlesAction53 scripts, 367 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://x.ai/_next/static/chunks/fc0fe076-c1810b44ae72024a.js | 114 KB | 89 KB (78%) | ✓ | 1st |
| https://x.ai/_next/static/chunks/28332-8f12f9df997bf83d.js | 99 KB | 78 KB (80%) | ✓ | 1st |
| https://x.ai/_next/static/chunks/28978-07ef7107469b132b.js | 61 KB | 56 KB (92%) | ✓ | 1st |
| https://x.ai/_next/static/chunks/86363-d5d5aa57009dfb70.js | 50 KB | 48 KB (96%) | ✓ | 1st |
| https://x.ai/_next/static/chunks/622eaf3d-a3331ffa4ef2161c.js | 56 KB | 42 KB (76%) | ✓ | 1st |
| https://x.ai/_next/static/chunks/a5a03073-9e8e27c6f1cb42e4.js | 74 KB | 33 KB (45%) | ✓ | 1st |
| https://x.ai/_next/static/chunks/0fd4459a-23d6a3a65c49fc6a.js | 74 KB | 21 KB (28%) | ✓ | 1st |
| https://x.ai/_next/static/chunks/64397-ae3ab226f276bc91.js | 5 KB | — | ✓ | 1st |
| https://x.ai/_next/static/chunks/app/layout-4261c4086ffc4778.js | 1 KB | — | ✓ | 1st |
| https://x.ai/_next/static/chunks/2224-556c4a9c0cf6297f.js | 19 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
BPage Weight Budget1.4 MB transferred, 74 requestsREVIEW
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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
CPage Weight InventoryAction74 resources · 1.4 MB · 367 KB savings availableREVIEW
~366.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 74 resources | 1.4 MiB | ||||||
BHTTP Cachings-maxage=31536000REVIEW
s-maxage=31536000
| Directive | Value | Meaning |
|---|---|---|
| s-maxage | 31536000 | CDN caches for 52 weeks |
A+Third-Party ImpactNo third-party resourcesPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization2 images, 0 KB saveablePASS
A+Font Loading9 fonts (360 KB)PASS
Web fonts
9
360 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
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)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall74 requests over 1875msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1020ms | 0 KB | — | $14/mo | Costly |
These scripts may cost more than they're worth
- Unattributable adds 1020ms and costs ~$14/month
Unattributable takes 1020ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev