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C++ 时间处理-统计函数运行时间

news 2025/8/4 17:39:13

1. 关键词
2. 问题
3. 解决思路
4. 代码实现
- 4.1. timecount.h
- 4.2. timecount.cpp
5. 测试代码
6. 运行结果
7. 源码地址

1. 关键词

C++ 时间处理统计函数运行时间跨平台

2. 问题

C++如何简单便捷地实现“函数运行时间的统计”功能？

3. 解决思路

类的构造函数：会在对象初始化的时候被调用。
类的析构函数：会在对象销毁的时候被调用。
局部对象的生命周期：对象实例化（也就是初始化）时开始，退出作用域时结束。

4. 代码实现

4.1. timecount.h


#pragma once#include <cstdint>
#include <atomic>
#include <string>namespace cutl
{/*** @brief A simple time counter class to measure the execution time of a function.**/class timecount{public:/*** @brief Construct a new timecount object* The constructor will record the begin time of the function calling.* @param func_name*/timecount(const std::string &func_name);/*** @brief Destroy the timecount object* The desctructor will record the end time of the function calling and calculate the execution time.*/~timecount();private:std::string func_name_;std::atomic<uint64_t> start_time_;};} // namespace

4.2. timecount.cpp

#include "timecount.h"
#include "timeutil.h"
#include "strfmt.h"
#include "inner/logger.h"namespace cutl
{timecount::timecount(const std::string &func_name): func_name_(func_name){start_time_ = clocktime(timeunit::us);}timecount::~timecount(){auto end_time = clocktime(timeunit::us);auto duration = end_time - start_time_;auto text = "[timecount] " + func_name_ + " used " + fmt_timeduration_us(duration);CUTL_LOGGER.info("", text);}
} // namespace

5. 测试代码

#pragma once#include <iostream>
#include "timecount.h"
#include "common.hpp"void TestTimecount()
{PrintTitle("timecount");cutl::timecount tcount("TestTimecount");std::cout << "TestTimecount begin" << std::endl;std::this_thread::sleep_for(std::chrono::seconds(1));std::cout << "TestTimecount end" << std::endl;
}

6. 运行结果

=============================================timecount==============================================
TestTimecount begin
TestTimecount end
[2024-05-19 22:34:35.853][I]]0x7ff844a9b100](cutl)  [timecount] TestTimecount used 01s.004955us