Defer Non-Critical Third-Party Libraries

Analytics, logging, and error tracking don't block user interaction. Load them after hydration.

Incorrect (blocks initial bundle):

tsx

import {Analytics} from '@vercel/analytics/react'

export default function RootLayout({children}) {
  return (
    <html>
      <body>
        {children}
        <Analytics />
      </body>
    </html>
  )
}

Correct (loads after hydration):

tsx

import dynamic from 'next/dynamic'

const Analytics = dynamic(() => import('@vercel/analytics/react').then((m) => m.Analytics), {
  ssr: false,
})

export default function RootLayout({children}) {
  return (
    <html>
      <body>
        {children}
        <Analytics />
      </body>
    </html>
  )
}