A developer is building an application that includes an AWS Lambda function that is written in .NET Core. The Lambda function's code needs to interact with Amazon DynamoDB tables and Amazon S3…

Increasing Lambda memory improves CPU allocation and runtime performance but does not reduce the deployment package size or the time spent loading unnecessary SDK assemblies during initialization.

Including the entire AWS SDK for .NET bundles hundreds of unused service clients, significantly increasing package size and worsening both deployment time and cold start latency.

The AWS SDK for .NET is modular; including only the AWSSDK.DynamoDBv2 and AWSSDK.S3 NuGet packages instead of the entire SDK dramatically reduces the deployment package size. A smaller package results in faster S3 uploads during deployment, less code to load into the execution environment, and shorter cold start initialization times.

Downloading the SDK at runtime from S3 adds variable network latency on every cold start, increases invocation duration, and introduces a runtime dependency on S3 availability.