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What would you recommend that is fast enough (ie not Ruby or Python)?

I’m hedging my bets on lots of small bits of well decoupled and well designed Go with micro frontends in JS sitting on top of Kubernetes. It sits in the niche area of being typed, quite fast, light weight, reliable, fast startup, decent tooling and concise enough to be able to build knowledge and retain it.

If all you're doing is web dev, Ruby and Python are both more than fast enough.

Imagine how much less compute capacity we would need if Ruby and Python were as fast as .net core.

We're talking a lot about doing something for the environment, it could start with using "fast enough" languages.

Of course we need to find a compromise between performances and ease of use. So I wouldn't abandon .net core for Ruby or Python, but I would for something as performant (or better ofc) but friendlier to use.

In that case, the elephant in the room is of course Javascript ;) It can be up to 50x faster than python or ruby.

A single RDS instance and a handful of web servers can handle hundreds of millions to low billions of requests a month with last byte responses under 200-300ms.

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