Time Counter

• 高精度计时

#include <windows.h>
// 计时
double PCFreq = 0.0;
__int64 CounterStart = 0;

void StartCounter() {
    LARGE_INTEGER li;
    if (!QueryPerformanceFrequency(&li))
        cout << "QueryPerformanceFrequency failed!\n";

    PCFreq = double(li.QuadPart) / 1000.0;

    QueryPerformanceCounter(&li);
    CounterStart = li.QuadPart;
}

double GetCounter() {
    LARGE_INTEGER li;
    QueryPerformanceCounter(&li);
    return double(li.QuadPart - CounterStart) / PCFreq;
}

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Last update: December 2, 2023
Created: December 2, 2023