Avoid these Painful Mistakes Slowing your Next.js apps

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Here are a five common mistakes I've seen developers make in Next.js that are truly slowing your apps.

  • Not Utilizing the sizes Prop with the Image Component ğŸŽ¨
  • Incorrect Usage of Loading States in Server Actions 🔁
  • Misplacement of Redirect Functions in Server Actions ←
  • Inadequate Cache Management 📦
  • Improper Component Architecture 🌐

We won't be diving into each one but only "Not utilizing the sizes Prop with the Image component".

To watch the rest, you can check out my Youtube video here ↗️​

🍿 Our Weekly Snack: Not Utilizing the sizes Prop with the Image Component

Here is a quick code snippet,

For optimal performance benefits with Next.js's image component, it's essential to specify the sizes prop along with fill={true} property to ensure the appropriate image size is served based on viewport dimensions.

Failure to do so may result in inefficient image loading, causing larger images to be downloaded unnecessarily. This means you'll download an image 3x the size on a smaller mobile device.

This can easily slow down your app performance.

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