Cloudflare vs AWS Lambda (I/O Heavy)

Lambda bills you while waiting for network I/O. Cloudflare pauses the billing timer. See the difference.

Monthly Invocations (Millions)

Active CPU Processing Time (ms)Time spent parsing JSON, rendering React, etc.

Idle / Network Wait Time (ms)Time spent waiting for a Database or external API to respond.

The I/O Trap: When your serverless function makes a database query that takes 300ms, AWS Lambda charges you for 300ms of CPU time while it sits idle. Edge providers like Cloudflare intercept the I/O call and pause your billing timer until the data returns.

About Cloudflare vs Lambda

Compare serverless edge runtime costs and cold starts between Cloudflare Workers and AWS Lambda.

Why Use This Calculator?

Accurate infrastructure sizing prevents unexpected cloud budget blowouts while guaranteeing SLA compliance and system reliability under peak traffic.