OOC与CPP生成代码大小对比
今天做了一个简单的对比测试,看一下gcc模拟oo与g++生成代码(strip无用符号后)大小的比较
下面附上测试demo,先来OOC的
/*
* test_Animals.c
*
* Created on: 2011-5-16
* Author: Jesse Meng [pingf0@gmail.com]
*/
#include "OOStd.h"
CLASS(Animal){
char *name;
STATIC(Animal)
vFn talk;
};
int Animal_reload(Animal *THIS,char *name){
THIS->name=ALLOC(strlen(name)+1);
memcpy(THIS->name,name,strlen(name));
return 0;
}
int Animal_unload(Animal *THIS,void *PARAM){
FREE(THIS->name);
return 0;
}
ASM(Animal,Animal_reload,Animal_unload,NULL,NULL)
CLASS_EX(Animal,Cat){
STATIC_EX(Animal,Cat)
};
static void Meow(Animal *THIS){
printf("Meow!My name is %s!\n",THIS->name);
}
int Cat_reloadSt(StAnimal *THIS,void *PARAM){
THIS->talk=(void *)Meow;
return 0;
}
ASM_EX(Animal,Cat,NULL,NULL,Cat_reloadSt,NULL)
CLASS_EX(Animal,Dog){
STATIC_EX(Animal,Dog)
};
static void Woof(Animal *THIS){
printf("Woof!My name is %s!\n",THIS->name);
}
int Dog_reloadSt(StAnimal *THIS,void *PARAM){
THIS->talk=(void *)Woof;
return 0;
}
ASM_EX(Animal,Dog,NULL,NULL,Dog_reloadSt,NULL)
int main(){
Animal *a[]={
///////////////////////////
(void*)newDog("Jack"),
(void *)newCat("Lily"),
(void*)newDog("Mike"),
(void *)newCat("Lucy"),
// 100个,这里懒得写了,因为测试时是cccv的 .....
};
int i=0;
//StAnimal *f=ST((Dog*)(a[0]));
StAnimal *f=ST((Dog*)(a[0]));
for(i=0;i<100;++i){
f->talk(a[i]);
}
for(i=0;i<100;++i){
//delDog((Dog**)&(a[i]),NULL);
delDog((Dog**)&(a[i]),NULL);
}
return 0;
}
下面来看下CPP的
#include <iostream>
#include <string>
using namespace std;
class Animal
{
public:
Animal(const string& name) : name(name) {}
virtual void talk() = 0;
const string name;
};
class Cat : public Animal
{
public:
Cat(const string& name) : Animal(name) {}
virtual void talk() { cout<<"Meow!Myname is "+name<<endl; }
};
class Dog : public Animal
{
public:
Dog(const string& name) : Animal(name) {}
virtual void talk() { cout<<"Woof!Myname is "+name<<endl; }
};
int main()
{
Animal* animals[] =
{
///////////////
new Dog("Jack"),
new Dog("Mike"),
new Cat("Lily"),
new Cat("Lucy"),
// 这里同样100个 .....
};
for(int i = 0; i < 100; i++){
animals[i]->talk();
}
for(int i = 0; i < 100; i++){
delete animals[i];
}
return 0;
}
尽管我已经将OOC-GCC写的足够简单了,但还是比CPP写出来稍长一点(感觉还好一般20行左右)
不过编译出来的我还是比较满意的,
上面两段代码输出一致,风格一致,都是最基本的形式.
类设计为一个基类,两个近似的继承类,100个任意继承类的对象.
先生成100堆对象,执行100次各对象的基本方法,然后逐一销毁.
实际测试后cpp编译出来的体积为32246,通过OOC-GCC宏出来仅为21518(而这里面还包括内存分配日志,时间测试等函数的调用)
这个多少有点出乎我的意料,因为OOC-GCC通过宏引入了相当多的辅助函数,比如上面的实际用到的关于对象辅助生成的函数应该至少有24个,而且每个体积也不小的.
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