Feature request: reduce npm_modules size

[saragerion]

Bug description

The current bundle size of the Logger library is unnecessarily big. This has an impact on the performance of the Lambda functions (cold starts included).

Expected Behavior

The node_modules folder has a reasonable size.

Current Behavior

The node_modules folder is 139M.

Possible Solution

One of the biggest reasons is the lodash library that is currently a prod dependency, which is unnecessary.
It would also be good to double check whether we publish the NPM packages installing only the prod dependencies and not the dev dependencies.

Steps to Reproduce

Install the library in your local env, and check the node_modules folder size:

du -sh *
139M	node_modules
436K	package-lock.json
4.0K	package.json

Environment

• Powertools version used: latest
• Packaging format (Layers, npm): NPM
• AWS Lambda function runtime: all
• Debugging logs: N/A

Related issues, RFCs

N/A

[saragerion]

Thanks @michaelbrewer for the heads-up!

[michaelbrewer]

of coz we should see what size the packaged lambda is and how small we can make it.

[dreamorosi]

Good point, we initially removed the whole lodash in favor of smaller packages as mentioned here, but somehow it got reintroduced, I think around the time when we had multiple eslint configs.

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[michaelbrewer]

@saragerion there is also a lot of test resources in "commons" that we already have in shared. About 208k worth.

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[michaelbrewer]

I know this issue closed, but i assume for the production release there is plans to see how to minimize the size of the node_modules? Like how the aws-sdk-v3 is very lightweight: https://aws.amazon.com/blogs/developer/how-we-halved-the-publish-size-of-modular-aws-sdk-for-javascript-clients/

And for non-typescript users? should @types/aws-lambda always be included?

And maybe tips for the lambda layer:

• https://github.com/ModClean/modclean
• https://github.com/tj/node-prune
• https://tsh.io/blog/reduce-node-modules-for-better-performance/