C/C++ 测耗时

<time.h>

LARGE_INTEGER frequency,start,stop;
	QueryPerformanceFrequency(&frequency);
	srand(time(NULL));
	QueryPerformanceCounter(&start);
QueryPerformanceCounter(&stop);
	double time;
	time = (stop.QuadPart-start.QuadPart)*1000/frequency.QuadPart;
	printf("Time:%fms\n",time);

 另一个方式：

timeGetTime

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