Provisioned Concurrency for AWS Lambda is now available in both AWS GovCloud (US) Regions. Provisioned Concurrency is a feature that provides customers greater control over performance of their serverless applications at any scale. Functions using Provisioned Concurrency execute with consistent start-up latency making them ideal for building interactive mobile or web backends, latency sensitive microservices, and synchronously invoked APIs. Read more about Provisioned Concurrency in the AWS Lambda documentation .