At least C# has things like the struct keyword to prevent heap allocations for simple data structures. I don't know if recent Java has caught up with this, but

At least C# has things like the struct keyword to prevent heap allocations for simple data structures. I don't know if recent Java has caught up with this, but it was one of the innovative features MS came up with for .NET to avoid unnecessary overhead. I feel like it's possible to write careful C# for performance. It just won't be entirely idiomatic. Things like buffer re-use, ordinary techniques you'd need to apply manually for C and C++ in similar domains too.