I'm not intimately familiar with all of the AWS infrastructure around a running EC2 but I imagine a lot of time is spent on creating the associated Elastic Bloc

I'm not intimately familiar with all of the AWS infrastructure around a running EC2 but I imagine a lot of time is spent on creating the associated Elastic Block Storage, allocating an Elastic IP Address, creating an Elastic Network Interface, creating a default security group etc, then attaching all of those things to the EC2, then attaching the required resources to an Internet Gateway etc.