We Replaced AWS Lambda with Cloudflare Workers 3.0: Postmortem of 50% Lower Latency for Global Users Last quarter, our engineering team completed a full migration of our serverless compute workload from AWS Lambda to Cloudflare Workers 3.0. The primary driver was inconsistent latency for our global user base: 60% of our users are outside the US East region where our Lambda functions were deployed, leading to p90 latency spikes over 300ms. After a 3-month migration and 6 weeks of stable production traffic, we’ve recorded a 50% reduction in median latency globally, with even steeper improvements for users in APAC and EMEA regions. Background: Our Lambda Pain Points We’re a B2B SaaS platform serving 120k+ active users across 62 countries, with core workloads including user authentication, dynamic API responses, and on-the-fly image resizing. For 3 years, AWS Lambda handled these workloads reliably, but we hit three critical limitations: Regional latency: Lambda functions run in a single AWS region.…