speedtest.cpp

#include <stdio.h>
#include <Windows.h>
#include <vector>
#pragma comment(lib,"winmm.lib")

#define LOOPS 1000000


void  NormalValueTest ( void );

int main ( void ) {
	std::vector<size_t> a;

	for ( size_t i = 0; i < 10000; i++ ) {
		a.push_back ( i );
	}

	DWORD ms = 5000;
	int fastFlag = 0;
	for ( int i = 0; i < 5; i++ ) {

		printf ( "[%d回目]\n" , i +1);

		auto it = a.begin ( );

		long long before  , after ;
		DWORD st;
		DWORD et;
		before = 0;
		after = 0;
		st = timeGetTime ( );
		do {
			++before;

			if ( it == a.end ( ) )it = a.begin ( );
			++it;
			et = timeGetTime ( );
		} while ( ( et - st ) < ms );
		printf ( "前置インクリメント：%I64u\n" , before );

		it = a.begin ( );
		st = timeGetTime ( );
		do {
			after++;
			if ( it == a.end ( ) )it = a.begin ( );
			it++;
			et = timeGetTime ( );
		} while ( ( et - st ) < ms );
		printf ( "後置インクリメント：%I64u\n\n" , after );


		if ( before > after ) fastFlag--;
		else if ( before < after ) fastFlag++;
	}

	printf ( "fastflag = %d\n" , fastFlag );

	return 0;
}


void  NormalValueTest ( void ) {
	long long before = 0 , after = 0;
	DWORD st;
	DWORD et;
	st = timeGetTime ( );
	do {
		++before;
		et = timeGetTime ( );
	} while ( ( et - st ) < 5000 );
	printf ( "前置インクリメント：%I64u\n" , before );
	st = timeGetTime ( );
	do {
		after++;
		et = timeGetTime ( );
	} while ( ( et - st ) < 5000 );
	printf ( "後置インクリメント：%I64u\n" , after );
}