Testing the runtime difference between Python and Rust for AWS Lambda.
All AWS Lambda's must include a handler function lambda_handler, this is what
the lambda runtime will call be default.
When triggering these lambdas off an s3 event, it's important to note more than one event might run though that lambda invocation, hence the inital loop.
See the full blog post here https://www.confessionsofadataguy.com/aws-lambdas-python-vs-rust-performance-and-cost-savings/
Rust lambda.
You will need to add the crate cargo-lambda. It helps you package and build
the bootstrip binary needed for deployment.
To build the bootstrap.zip that your Rust AWS Lambda needs, run cargo lambda build --release --output-format zip