In which types of memory operations are memory allocations not performed in the heap area?

In Go, memory allocation operations are not performed on the heap if objects can be placed on the stack or in static memory. This occurs when:

• Objects have a short lifespan and do not go beyond the function scope (allocated on the stack).
• Variables are global or static (allocated in static memory).

The Go compiler performs escape analysis to determine where exactly to place the object — on the heap or on the stack. If the object "does not escape" the function, it is placed on the stack, which is faster and more efficient.