I am deploying a CDK app that uses 9 different stacks. Many of the stacks either do not depend on each other, or can be deployed in parallel. For example one base stack that has a DynamoDB table needs to be deployed first, but then all five stacks which have a Lambda that uses that table could be deployed in parallel. Then finally a stack that creates the API gateway that points at those Lambda functions can be deployed.

Ideally I would like to be able to opt in to deploying stacks concurrently as much as possible. Right now CDK only ever deploys one stack at a time, which makes the overall cdk deploy much slower than it needs to be.