C/C++写得一个计时器用于检查程序的处理数据性能

待我称王封你为后i 2022-08-07 06:34 99阅读 0赞

一般设计C/C++程序需要每秒能处理多少的数据，因此可以做一个简单的计时器来计时，代码如下：

#ifndef _TIMER_H_  
    #define _TIMER_H_  
    #include <string>  
    #include <fstream>
    #include <sys/time.h>  
    
    using namespace std;  
    
    class Timer{  
    private:
            timeval tstart;  
            timeval tend;  
            unsigned count;  
            unsigned print_count;  
            ofstream output;
    
            void OpenFile();
    public:  
            Timer():count(0),print_count(10000){  
                OpenFile();
            }  
            Timer(int pc):count(0),print_count(pc){  
                OpenFile();
            }  
            ~Timer(){ output.close(); }
    
            void add(){  
                    count++;  
                    if(count % print_count == 0){  
                            end();  
                            begin();  
                    }  
            }  
            void begin(){  
                    gettimeofday(&tstart, NULL);  
            }  
            void end(){  
                    gettimeofday(&tend, NULL);  
                    double linStart = ((double)tstart.tv_sec * 1000000 + (double)tstart.tv_usec);   //unit S  
                    double linEnd = ((double)tend.tv_sec * 1000000 + (double)tend.tv_usec);         //unit S  
                    double delta = (linEnd-linStart)/1000000;                                       //second  
                    output << "Timer : " << print_count << " " << count << " " << delta << " " << print_count/delta << endl;
            }  
    };  
    
    void Timer::OpenFile()
    {
        output.open("timer.txt", ios::ate|ios::out);
        if (!output)
        {
            printf("Create file failed!");
            exit(-1);
        }
        output << "       " << "count" << " " << "total" << " " << "time" << " " << "frequence" << endl;
    }
    #endif /*_TIMER_H_*/

调用方式如下：

**\[cpp\]**  [view plain][] [copy][view plain]

1.  Timer timer(10000); //多少条数据打印一次  
2.  timer.begin();      //开始计时  
3.  **for**(;;)\{  
4.  timer.add();        //递增，达到打印数量时打印  
5.  \}  
6.  timer.end();        //最后打印一次

[view plain]: http://blog.csdn.net/marising/article/details/6543366#