API Performance Optimization

Understanding API Performance

API performance is critical for user experience. This guide covers the most effective optimization techniques for Next.js APIs.

Caching Strategies

Edge Caching

Use Next.js middleware for edge caching:

import { NextResponse } from 'next/server';

export async function middleware(request) {
  const response = NextResponse.next();

  // Cache for 1 hour
  response.headers.set('Cache-Control', 'public, s-maxage=3600');

  return response;
}

Database Query Optimization

Optimize database queries with proper indexing and query structure:

// Use select only needed fields
const { data } = await supabase
  .from('posts')
  .select('id, title, slug, excerpt')
  .eq('status', 'published')
  .order('created_at', { ascending: false })
  .limit(10);

Data Fetching Patterns

React Server Components

Leverage React Server Components for better performance:

async function Posts() {
  const posts = await fetchPosts();

  return (
    <div>
      {posts.map(post => (<PostCard key={post.id} post={post} />))}
    </div>
  );
}