You would do that even with a GC language like Java. The serious performance code paths in Java also do meticulous memory management to minimize allocations, G

You would do that even with a GC language like Java. The serious performance code paths in Java also do meticulous memory management to minimize allocations, GC costs, and utilize off-heap memory (Netty comes immediately to mind). In my opinion it’s the worst of both worlds at that point—you’ve got to manually manage memory and tip toe around the runtime.