> Meanwhile, "clever" things like zero cost map and filter are prioritized and in the language for a long time. This is because of what the language is trying

> Meanwhile, "clever" things like zero cost map and filter are prioritized and in the language for a long time. This is because of what the language is trying to do. Providing map and filter with zero is a priority 0. I think people think Rust had more development manpower than it actually had. Java/C# (and I would bet Go) have had significantly more money poured into them than Rust.