A simple demo of the orangejellyfish serverless-starter project to show some of the benefits. This service consists of three functions, each exposed via an API Gateway HTTP endpoint.
/hellois the default Serverless Framework starter function. It echos back the Lambda event as JSON. It has no dependencies./quotereturns a random inspirational quote. It has a dependency on the inspirational-quotes package from npm./punreturns a random software development pun. It has a dependency on the devpun package from npm.
By individually packaging Lambda functions we can significantly reduce the bundle size of each one, simplifying the code deployed to AWS and reducing the surface area for bugs and vulnerabilities.
You can run npm run package to build the bundles locally. This produces a zip
file for each function in the .serverless directory. Inspecting the contents
of each zip file allows you to see the contents of the bundle which in this case
should be a single JavaScript file containing only the compiled code and that of
any dependencies imported by that specific function.
The following image shows the output of webpack-bundle-analyzer for each bundle:
