golang 内存对齐&int8/int16/int32/int64区别

type One struct {
	id1 int8
	id2 int32
	id3 int8
}
type Two struct {
	id1 int32
	id2 int8
	id3 int8
}

func main() {
	fmt.Println(unsafe.Sizeof(One{}))       //size为12
	fmt.Println(unsafe.Sizeof(Two{}))       //size为8
	fmt.Println(unsafe.Sizeof("222222222")) //size为16
	fmt.Println(unsafe.Sizeof(111111111))   //size为8
	fmt.Println(unsafe.Sizeof(1.1))         //size为8
}

　这样我们在写代码定义结构体变量时，注意设定他的大小和顺序

对齐内容可看一篇文章：https://zhuanlan.zhihu.com/p/53413177