cloudflare-workers

To optimize Cloudflare Workers under the 10ms CPU limit, apply streaming responses, non-blocking I/O, early returns, and efficient Map or Set lookups to reduce CPU-bound processing in your server code.

The best patterns for reducing CPU time in edge functions include implementing early returns, replacing heavy computations with pagination, using Map or Set lookups, and delegating data transformations to the client when safe.

Streaming responses help avoid the CPU limit in Cloudflare Workers by bypassing large CPU-bound buffers, allowing data to flow directly to the client without blocking the server's event loop.

Yes, you can use this optimization approach for API routes and edge middleware by applying strict performance patterns like early returns and non-blocking I/O to ensure small server-side logic meets the 10ms CPU constraint.

You should delegate heavy computations to the client in edge functions when it is safe to do so, specifically to offload data transformations and prevent exceeding the strict 10ms CPU limit on the free plan.