[rafaelmn]

The point is that if you need performance you need to drop below tracing GC, and depending on your use-case, if that's the majority of your code it makes sense to use a language that's built for that kind of programming (zero cost abstractions). Writing C# that doesn't allocate is like wearing a straightjacket and the language doesn't help you much with manual memory management. Linters kind of make it more manageable but it's still a PITA. It's better than Java for sure in that regard, and it's excellent that you have the option for hot paths.

[pjmlp]

I rather have the productivity of a GC (regardless of which kind), manual allocations on system/unsafe code blocks, and value types, than going back to bare bones C style programming, unless there are constraints in place that leave no other option.

Note that even Rust's success, has triggered managed languages designers to research how far they can integrate linear, affine, effects, dependent types into their existing type systems, as how to combine the best of both worlds.

To the point that even Rust circles now there are those speaking about an higher level Rust that is supposed be more approachable.

[gavinray]

This is essentially how I feel -- GC by default with user control over zero-copy/stackalloc behavior.

Modern .NET isn't even difficult to avoid allocations, with the Span<T> API and the work they've done to minimize unnecessary copies/allocs within the std lib.

(I say this as a Kotlin/JVM dev who watches from the sideline, so not even the biggest .NET guy around here)

[arcadia_leak]

> Writing C# that doesn't allocate is like wearing a straightjacket

Yes, and that's where D is majorly superior to C# -- it's flexible enough for you to go down to the metal for the critical parts.

[pjmlp]

That is the no longer the case in C# 14/.NET 10, D has lost 16 years counting from Andrei's book publishing date, letting other programing languages catch up to more relevant features.

You are forgetting that a language with a less mature ecosystem isn't much help.