c++性能分析工具类统计程序每一步的执行时间

ops/2024/9/22 19:45:11/

在c++中，经常需要做性能分析，统计不同的函数，不同的代码块的执行时间，为了方便统计，实现了一个统计类
有两个函数，第一个是统计从时间统计类从初始化到当前调用的次数，第二个是记录运行了多久，第三个是统计本次调用和上一次调用的时间差距，并打印当前的时间的年月日时分秒，还自定义地打印一下本次的标记信息。

效果如下
在这里插入图片描述

类如下

#include <iostream>
#include <chrono>
#include <vector>
#include <string>
#include <ctime>
#include <iostream>
#include <cmath> #include <iostream>
#include <sstream>
#include <iomanip>#ifdef _WIN32
#include <Windows.h>
#endifclass TimeLogger {
public:TimeLogger() {start_time = std::chrono::system_clock::now();previous_time = start_time;time_number = 0;}void get_now_time(std::string show_str = "") {auto current_time = std::chrono::system_clock::now();auto time_diff = std::chrono::duration<double>(current_time - previous_time).count();previous_time = current_time;std::time_t current_time_t = std::chrono::system_clock::to_time_t(current_time);std::string current_time_str = std::ctime(&current_time_t);SetConsoleOutputCP(65001); // 设置控制台输出编码为 UTF-8// Remove newline characterif (!current_time_str.empty() && current_time_str[current_time_str.size() - 1] == '\n') {current_time_str[current_time_str.size() - 1] = '\b'; // Replace '\n' with '\b'}if (show_str != "") {// std::cout << show_str;std::cout << "["  << time_number<< "\t  time--->" <<this->format_float_to_3decimals(this->get_time_since_init())<<"s \t" << " " << time_diff << "s \t" << current_time_str <<" \t"<<show_str<< "]" << std::endl;}else{std::cout << "["  << time_number<< "\t  time--->" <<this->format_float_to_3decimals(this->get_time_since_init())<<"s \t" << " " << time_diff << "s \t" << current_time_str << "]" << std::endl;}time_number++;}double get_time_since_init() {auto current_time = std::chrono::system_clock::now();auto time_diff = std::chrono::duration<double>(current_time - start_time).count();// Get current time in time_t format and convert it to a stringstd::time_t current_time_t = std::chrono::system_clock::to_time_t(current_time);std::string current_time_str = std::ctime(&current_time_t);// Remove newline character from current_time_strcurrent_time_str = current_time_str.substr(0, current_time_str.size() - 1);// Return time difference with 3 decimal pointsreturn std::round(time_diff * 1000) / 1000.0;}std::string format_float_to_3decimals(double input_float) {std::stringstream ss;ss << std::fixed << std::setprecision(3) << input_float;std::string formatted_float = ss.str();// Pad with zeros if necessarysize_t decimal_pos = formatted_float.find(".");if (decimal_pos != std::string::npos && formatted_float.size() - decimal_pos < 4) {formatted_float += "0";}return formatted_float;
}private:std::chrono::time_point<std::chrono::system_clock> start_time;std::chrono::time_point<std::chrono::system_clock> previous_time;int time_number;
};int main() {TimeLogger logger;logger.get_now_time("初始化");for(int i=0;i<=100;i++){logger.get_now_time("中文修改中 "+std::to_string(i));Sleep(100);}logger.get_time_since_init();return 0;
}