同一个exe分别从命令行和VS2005启动程序:计算函数执行的时间差在2个情况下存在太大的差异?

const int gnLoopCounts = 40000;



void testFreeAsStack(PMalloc _alloc, PFree _free) 

{

	vector<void*> vctPointer;

	vctPointer.reserve(gnLoopCounts);



	int i=0;

	for (; i<gnLoopCounts; ++i)

	{

		void* pMem = _alloc(i+1);

		if (NULL != pMem)

		{

			vctPointer.push_back(pMem);



			memset(pMem, 0, i+1);

		}

	}



	for (i=vctPointer.size()-1; i>=0; --i)

	{

		_free(vctPointer[i]);

	}

}