Medium - mark and sweep

allocation.go

type struct1 struct {
	a, b int64
	c, d float64
	e *struct2
}

type struct2 struct {
	f, g int64
	h, i float64
}

func main() {
	s1 := allocStruct1()
	s2 := allocStruct2()

	func () {
		_ = allocStruct2()
	}()

	runtime.GC()

	fmt.Printf("s1 = %X, s2 = %X\n", &s1, &s2)
}

//go:noinline
func allocStruct1() *struct1 {
	return &struct1{
		e: allocStruct2(),
	}
}

//go:noinline
func allocStruct2() *struct2 {
	return &struct2{}
}