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