[Project setup] AADev I see that the core bundler is esbuild, and I can observe the bundle produced

[April-Bates-Dev]

Postestimated to a 5

The size of some of our lambdas is quite large. It would be useful to better understand what is causing this, and to bundle them better. To do this, we will bundle our lambda code with esbuild rather than tsc.

Staging lambda sizes, as of 14 September.

staging-get-user-lambda
9.8 MB

staging-update-user-lambda
9.9 MB

staging-demo-review-lambda
10.4 MB

staging-review-lambda
1.2 MB

Tech steps:

• Rerecord the size of the lambdas (you can see the lambda sizes by looking in the console)
• Swap bundler so we are using esbuild rather than tsc.
• Use https://esbuild.github.io/analyze/ to analyse the bundles, to get visibility into whether any packages are being bundled when they shouldn't be.
• Check the new lambda sizes, to see if they are smaller. Create follow up ticket to make edits to the esbuild configuration to make the bundle smaller, as well as using the output of the esbuild analysis to make the package size smaller.

Validation steps:

• See screenshot of deployed lambdas with size smaller than those listed in event description