1. We've moved our company code base from tight C/C++ code to Swift. It is just as fast, with higher level syntax. In some cases faster. It has native SIMD types without external libraries too. Moreover, the Swift group has been focusing on correctness over performance to date. The goal has always been, that its deeply typed design can enable optimizations not even possible in c/c++.
2. Several of the founding Rust team moved to the Swift dev team years ago. As of Swift 5, the memory model supports the Rust-like borrowing. One could say Swift at this point is a complete superset of Rust. But, more importantly Swift favors a functional style of value type operations... which are inherently memory safe, and have no concurrency side effects in the first place. Value types together with Swift's very easy to use Dispatch concurrency library work for most use cases... it is viewed that "borrowing" is only a special purpose opt-in feature.
3. Swift is pragmatic. It is functional in its type system, value type operation, and no side-effect philosophy. But it is multi-paradigm, flexible, and designed for the real-world problems that reflect real programming needs... where as Haskell is arguably an academic curiosity and extremely unlikely to become a mainstream general purpose language.
1. We've moved our company code base from tight C/C++ code to Swift. It is just as fast, with higher level syntax. In some cases faster. It has native SIMD types without external libraries too. Moreover, the Swift group has been focusing on correctness over performance to date. The goal has always been, that its deeply typed design can enable optimizations not even possible in c/c++.
2. Several of the founding Rust team moved to the Swift dev team years ago. As of Swift 5, the memory model supports the Rust-like borrowing. One could say Swift at this point is a complete superset of Rust. But, more importantly Swift favors a functional style of value type operations... which are inherently memory safe, and have no concurrency side effects in the first place. Value types together with Swift's very easy to use Dispatch concurrency library work for most use cases... it is viewed that "borrowing" is only a special purpose opt-in feature.
3. Swift is pragmatic. It is functional in its type system, value type operation, and no side-effect philosophy. But it is multi-paradigm, flexible, and designed for the real-world problems that reflect real programming needs... where as Haskell is arguably an academic curiosity and extremely unlikely to become a mainstream general purpose language.