C/C++
#include
#include
using namespace std;
int main() {
clock_t start, finish;
double totalTime;
start = clock();
//需要測試運作時間的代碼段放在這
finish = clock();
totalTime = (double)(finish - start); cout<<"花費"<
return 0;
}
#include
#include
using namespace std;
int main() {
LONGLONG start, finish;
LONGLONG totalTime;
start = GetTickCount();
//需要測試運作時間的代碼段放在這
finish = GetTickCount();
totalTime = finish - start;
cout<<"花費"<
return 0;
}
Java
//僞代碼
long start=System.currentTimeMillis(); //擷取開始時間
doSomeThing(); //測試的代碼段
long end=System.currentTimeMillis(); //擷取結束時間
System.out.println("程式運作時間： "+(end-start)+"ms");
納秒機關
//僞代碼
long start=System.nanoTime(); //擷取開始時間
doSomeThing(); //測試的代碼段
long end=System.nanoTime(); //擷取結束時間
System.out.println("程式運作時間： "+(end-start)+"ns");
Python
from time import clock
start=clock()
//code
finish=clock()
print (finish-start)/1000000
http://www.cnblogs.com/moinmoin/archive/2011/03/18/python-runtime-measuring.html
# -*- coding: utf-8 -*-
#!/bin/env python
def test1():
n=0
for i in range(101):
n+=i
return n
def test2():
return sum(range(101))
def test3():
return sum(x for x in range(101))
if __name__=='__main__':
from timeit import Timer
t1=Timer("test1()","from __main__ import test1")
t2=Timer("test2()","from __main__ import test2")
t3=Timer("test3()","from __main__ import test3")
print t1.timeit(1000000)
print t2.timeit(1000000)
print t3.timeit(1000000)
print t1.repeat(3,1000000)
print t2.repeat(3,1000000)
print t3.repeat(3,1000000)
原文：http://blog.csdn.net/tanzhangwen/article/details/40787903