Organize Cloud Functions for max cold start performance and readability with TypeScript and Firebase

A while back I made a video about minimizing cold starts for functions deployed with the Firebase CLI using TypeScript:

It sums up the issue like this:

Suppose you have multiple functions exported from your index.ts that don’t all use the same static imports, like these two functions httpFn and firestoreFn:

import * as functions from 'firebase-functions'
import * as admin from 'firebase-admin'
admin.initializeApp()
export const httpFn =
functions.https.onRequest(async (request, response) => {
    // This function uses the Firebase Admin SDK
    const snapshot = await admin.firestore()
        .collection('users')
        .doc('uid')
        .get()
    const data = snapshot.data()
    response.send(data)
})
export const firestoreFn =
functions.firestore.document("users/{id}")
.onCreate(async (snapshot, context) => {
    // This function does not use firebase-admin,
    // and unnecessarily pays the cost of its import and init
    console.log(snapshot.data())
    return null
})