C++、C#、python執行效率對比
std::chrono::system_clock::time_point start = std::chrono::system_clock::now();
int jj = 0;
for (int i = 0; i < 100000000; i++)
{
if (i%2 == 0)
{
jj -= i;
}
else
{
jj += i;
}
}
double tt= std::chrono::duration_cast<std::chrono::milliseconds>
(std::chrono::system_clock::now() - start).count();
printf("%f, %d\n", tt, jj);
C++的debug執行時間約是release的3倍
double currentTime = System.DateTime.Now.TimeOfDay.TotalMilliseconds;
int jj = 0;
for (int i = 0; i < 100000000; i++)
{
if (i%2 == 0)
{
jj -= i;
}
else
{
jj += i;
}
}
textBox1.AppendText((System.DateTime.Now.TimeOfDay.TotalMilliseconds - currentTime).ToString() + " ");
textBox1.AppendText((jj).ToString() + "\r\n");
C#的debug執行時間約是release的2.5倍,約是C++的兩倍
kkk=range(1,100000000,1) timer = tool_timer() jj = 0; for i in kkk: if i%2==0: jj -= i; else: jj += i; print str(timer.elapsed_ms()) + " " + str(jj)
輸出: 15106.3252897 50000000
C++的debug執行時間約是release的3倍
C#的debug執行時間約是release的2.5倍,約是C++的兩倍
python執行時間約是C#debug的37倍,是C#release的88倍
python執行時間約是C++debug的53倍,是C++release的167倍