I think we would have preferred continuing with .NET, as no one is Rust expert on the team. But binary size and lack of some SIMD instructions moved the balance to Rust. And then, the PoC had big memory usage improvements, so...
What kind of SIMD instructions were not available? I assume something like AVX512GFNI or SHA x86 intrinsics?
I think if you're in domain of using SIMD, besides base RAM usage of 2-5MB you should not see drastic difference unless you have a lot of allocation traffic. But I guess Rust solved most of this, just wanted to note that specific memory and deployment requirements are usually solvable by changing build and GC settings.
