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  • 8 Ways to Measure Execution Time in C/C++

    转载自

    https://levelup.gitconnected.com/8-ways-to-measure-execution-time-in-c-c-48634458d0f9

    #include <chrono>
    class ElapsedTimer
    {
    public:
    	void start() {
    		begin = std::chrono::steady_clock::now();
    	}
    	int64_t nsElapsed() {
    		std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
    		return std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin).count();//[ns]
    	}
    	int64_t µsElapsed() {
    		std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
    		return std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count();//[µs]
    	}
    	int64_t msElapsed() {
    		std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
    		return std::chrono::duration_cast<std::chrono::milliseconds>(end - begin).count();//[ms]
    	}
    	int64_t sElapsed() {
    		std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
    		return std::chrono::duration_cast<std::chrono::seconds>(end - begin).count();//[s]
    	}
    	double_t msElapsedf() {
    		std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
    		return (std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count()) / 1000.0;//[ms .]
    	}
    	double_t sElapsedf() {
    		std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
    		return (std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count()) / 1000000.0;//[s .]
    	}
    private:
    	std::chrono::steady_clock::time_point begin;
    };
    
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  • 原文地址:https://www.cnblogs.com/cheungxiongwei/p/14174142.html
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