Using [Cloud] Tasks to orchestrate [Cloud] Functions

I thought of thie method of efficiently invoking functions - inspired by Apache Airflow, which is used for orchestrating workflows .

What is a Cloud Function

Functions can be Event triggered or HTTP triggered (as a RESTful service). A common use of this is you have series of tasks that your functions make use of

What is a Cloud Tasks

Without a Cloud Tasks

Without a task queue - all functions are subscribed to that event and are triggered. That means 3 functions would be invoked at the same time. This is expensive, for an application with a lot of traffic, and also a waste for functions that perform trivial tasks.

With Cloud Tasks

With a task queue - one function subscribes to that event, and then triggers other functions to perform long computational tasks, if they need to. This is resource efficient, and cost effective. Looks a bit complicated (it's not really) but it's a useful way of managing resources.