内存池和tcmalloc的性能比较

这次使用的内存池是原公司的，利用hash_map做的，大概的接口是这样：

template <class CObject>
class ObjectPool
{ 
public:
    typedef hash_map<int64_t,ObjectBlock*> BlockMap;
    virtual int pop(CObject *&ob);
    virtual int push(const CObject *ob);
private:
    BlockMap _block_map;
};

写测试代码比较了一下内存池和tcmalloc的差距！结果挺让人吃惊！

#define MAX_SIZE 50000


struct MsgToPut
{
	 UINT _wr_ptr;
	 UINT _rd_ptr;
	 UINT _length;
	 CHAR _base[1024];

	 void reset()
	 {
		 this->_rd_ptr = this->_wr_ptr = 0;
		 this->_length = 1024;
	 }
};

ObjectPool<MsgToPut> MsgPool;

void* newthread(void* argv)
{
	long long int start = get_os_system_time();

	for(int i=0;i<MAX_SIZE;i++)
	{
		MsgToPut* msg;
		MsgPool.pop(msg);
		if(msg == NULL)
		{
			printf("error\n");
		}
	}

	long long int end = get_os_system_time();

	printf("newthread ObjectPool:%d\n",end - start);


	MsgToPut* mtp[MAX_SIZE];

	for(int i=0;i<MAX_SIZE;i++)
	{
		mtp[i] = (MsgToPut*)tc_malloc(sizeof(MsgToPut));
		mtp[i]->reset();
	}

	start = get_os_system_time();
	printf("newthread tc malloc :%d\n",start - end);

	return (void*)0;
}

int main()
{

	pthread_t pid;
	pthread_create(&pid,NULL,newthread,NULL);
	pthread_create(&pid,NULL,newthread,NULL);
	pthread_create(&pid,NULL,newthread,NULL);

	long long int start = get_os_system_time();

	for(int i=0;i<MAX_SIZE;i++)
	{
		MsgToPut* msg = NULL;
		MsgPool.pop(msg);
		if(msg == NULL)
		{
			printf("error\n");
		}
	}

	long long int end = get_os_system_time();

	printf("main ObjectPool:%d\n",end - start);


	MsgToPut* mtp[MAX_SIZE];

	for(int i=0;i<MAX_SIZE;i++)
	{
		mtp[i] = (MsgToPut*)tc_malloc(sizeof(MsgToPut));
		mtp[i]->reset();
	}

	start = get_os_system_time();
	printf("main tc malloc :%d\n",start - end);

	return 0;
}

普遍打印数据为：

newthread ObjectPool:189
newthread ObjectPool:202
newthread tc malloc :24
newthread tc malloc :20
main ObjectPool:235
newthread ObjectPool:235
main tc malloc :21
newthread tc malloc :22