using namespace std::chrono;

void Test(size_t size, size_t cpy_times)
{
    printf("copy(size=%d bytes, loops=%d): ", size, cpy_times);
    char* src = new char[size]();
    char* dst = new char[size]();

    auto p1 = high_resolution_clock::now();
    for (int i = 0; i < cpy_times; ++i)
    {
        memcpy(dst, src, size);
    }
    auto p2 = high_resolution_clock::now();
    printf("time: %d ms\n", duration_cast<milliseconds>(p2 - p1).count());

    delete[] src;
    delete[] dst;
}



int main(int argc, char* argv[])
{
    Test(4096, 0x80000);
    Test(8192, 0x40000);
    Test(1024 * 500, 0x1000);
    Test(1024 * 1024 * 1, 0x800);
    Test(1024 * 1024 * 2, 0x400);
    Test(1024 * 1024 * 4, 0x200);
    Test(1024 * 1024 * 24, 0x100);
}
【 在 mountainlion 的大作中提到: 】
: 方便发测试代码看下吗
:
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