How long ago? Compared to 5 years ago C# performance has improved dramatically, and you have more tools available to control memory usage. That said, if you a

How long ago? Compared to 5 years ago C# performance has improved dramatically, and you have more tools available to control memory usage. That said, if you are trying to make a competitive first person shooter than never dips below 144fps, C# may not be a good choice. But there are popular competitive shooters out there using Unity, like Tarkov. But who knows how much pain they went through to get the performance they needed?