go-struct memory

type myStruct struct {
 myBool   bool    
 myFloat float64  // 8 bytes
 myInt  int32     // 4 bytes
}

a := myStruct{}
fmt.Println(unsafe.Sizeof(a)) // 24 bytes

type myStructOptimized struct {
 myFloat float64 // 8 bytes
 myBool  bool    
 myInt   int32   // 4 bytes
}

b := myStructOptimized{}
fmt.Println(unsafe.Sizeof(b)) // ordered 16 bytes