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C++で処理時間を計測

Last updated at Posted at 2014-01-17

実装した処理のパフォーマンスチューニングをする際に時間計測は必須です。
毎回調べているので、書き留めておきます。

time_count.cpp
#include <iostream>
#include <atltime.h>

int test(void){
	CFileTime cTimeStart, cTimeEnd;
	CFileTimeSpan cTimeSpan;
	cTimeStart = CFileTime::GetCurrentTime();           // 現在時刻

	//TOOD:ここに計測したい処理を記述

	cTimeEnd = CFileTime::GetCurrentTime();           // 現在時刻
	cTimeSpan = cTimeEnd - cTimeStart;
	std::cout<< "処理時間:" << cTimeSpan.GetTimeSpan()/10000 << "[ms]" << std::endl;
}
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