The thing is, javascript performance is mostly "good enough", and honestly that's what really matters.

When you have workloads that are mostly io bound, having syntactic sugar like js async/await to avoid blocking is really a huge strength.

When we write systems, we operate under constraints, and frequently the largest constraint is time to market rather than pure performance.

Dynamic typing can be a huge strength for TTM.

If performance was the only concern, we'd all be in straight C with inline asm.