How to solve timeouts and latency issues in Edge Functions using Node.js 24?

Timeouts and latency in Next.js Edge Functions using Node.js 24 can be optimized by leveraging HTTP/3, streaming responses, geographic pinning, setting longer maxDuration, caching aggressively, and monitoring performance metrics to auto-scale efficiently on Vercel.

To solve timeouts and reduce latency in Edge Functions running Node.js 24, deploy your functions with edge runtime enabled to run closer to users. Use HTTP/3 for faster 0-RTT handshakes. Implement streaming responses to start sending data immediately without waiting for full computation. Set maxDuration to allow longer execution for heavy tasks. Pin preferred regions near your users or backend to minimize network hops. Apply aggressive caching headers to reuse content during traffic spikes. Monitor with Vercel Analytics to tune deployment regions and concurrency. Using these practices ensures your Edge Functions will handle high global traffic smoothly without hitting timeout limits.

Code

// app/api/stream/route.ts
export const runtime = 'edge';
export const preferredRegion = ['iad1', 'sfo1']; // Pin near users
export const maxDuration = 300; // Allow 5-minute executions

export async function GET() {
  const stream = new ReadableStream({
    start(controller) {
      let count = 0;
      const encoder = new TextEncoder();

      const push = () => {
        if (count++ < 100) {
          controller.enqueue(encoder.encode(`Chunk ${count}\n`));
          setTimeout(push, 100); // Stream every 100ms
        } else {
          controller.close();
        }
      };

      push();
    },
  });

  return new Response(stream, {
    headers: {
      'Cache-Control': 's-maxage=60, stale-while-revalidate',
      'Content-Type': 'text/plain',
    },
  });
}