Hi brian, thanks for your long comment and your point of view.
I totally agree with you. The computation performance that I tested aren’t the real world usage of serverless services.
And as you describe well that in your comment, it’s the same conclusion as me: the company context, the developers’ skills and preferences matter and impact the choice, above the strict language performance.
Note: most of the time the cost of a developer is much more higher than the running cost in the Cloud. Prefer a language that optimise the development process instead of the runtime performances (if you haven’t specific use case on that topic)