Click the orange Create Function button. Specify the function’s name and the Python version (Python 3.10 is recommended). Edit the Python code in Amazon’s embedded code editor. Click Deploy and then ...

This functions as a somewhat abstract combination of Docker-style containers and serverless computing services like AWS Lambda. There’s also an open-source alternative to Lambda: Apache OpenWhisk .

Now, with SnapStart, AWS is addressing this by creating snapshots of a customer’s Lambda functions and then simply starting those up without having to go through the usual initialization process.