Created
February 13, 2022 20:39
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#include <iostream> | |
#include <vector> | |
#include <algorithm> | |
#include <Windows.h> | |
#include <MyStudyConsoleApplication.h> | |
using namespace std; | |
//for_each用関数 | |
void Hoge(int x) | |
{ | |
int a = x; | |
} | |
void for_ex1() { | |
vector<int> array; | |
for (int i = 0; i < MAX; ++i) { | |
array.push_back(i); | |
} | |
LARGE_INTEGER freq; | |
QueryPerformanceFrequency(&freq); | |
LARGE_INTEGER start, end; | |
printf("初期化Int型でサイズ文回す \n"); | |
QueryPerformanceCounter(&start); | |
for (int x : array) { | |
int a = x; | |
} | |
QueryPerformanceCounter(&end); | |
double time = static_cast<double>(end.QuadPart - start.QuadPart) * 1000.0 / freq.QuadPart; | |
printf("time %lf[ms]\n", time); | |
} | |
void for_ex2() { | |
vector<int> array; | |
for (int i = 0; i < MAX; ++i) { | |
array.push_back(i); | |
} | |
LARGE_INTEGER freq; | |
QueryPerformanceFrequency(&freq); | |
LARGE_INTEGER start, end; | |
printf("初期化Auto型でサイズ文回す \n"); | |
QueryPerformanceCounter(&start); | |
for (auto x : array) { | |
int a = x; | |
} | |
QueryPerformanceCounter(&end); | |
double time = static_cast<double>(end.QuadPart - start.QuadPart) * 1000.0 / freq.QuadPart; | |
printf("time %lf[ms]\n", time); | |
} | |
void for_ex3() { | |
vector<int> array; | |
for (int i = 0; i < MAX; ++i) { | |
array.push_back(i); | |
} | |
LARGE_INTEGER freq; | |
QueryPerformanceFrequency(&freq); | |
LARGE_INTEGER start, end; | |
printf("初期化int型でカウント回し \n"); | |
QueryPerformanceCounter(&start); | |
int count = 0; | |
for (int i = 0; i < array.size();i++) { | |
int a = array[count++]; | |
} | |
QueryPerformanceCounter(&end); | |
double time = static_cast<double>(end.QuadPart - start.QuadPart) * 1000.0 / freq.QuadPart; | |
printf("time %lf[ms]\n", time); | |
} | |
void for_ex4() { | |
vector<int> array; | |
for (int i = 0; i < MAX; ++i) { | |
array.push_back(i); | |
} | |
LARGE_INTEGER freq; | |
QueryPerformanceFrequency(&freq); | |
LARGE_INTEGER start, end; | |
printf("初期化イテレータで終わりまで \n"); | |
QueryPerformanceCounter(&start); | |
int count = 0; | |
for (vector<int>::iterator i = array.begin(); i != array.end(); i++) { | |
int a = *i; | |
} | |
QueryPerformanceCounter(&end); | |
double time = static_cast<double>(end.QuadPart - start.QuadPart) * 1000.0 / freq.QuadPart; | |
printf("time %lf[ms]\n", time); | |
} | |
void for_ex5() { | |
vector<int> array; | |
for (int i = 0; i < MAX; ++i) { | |
array.push_back(i); | |
} | |
LARGE_INTEGER freq; | |
QueryPerformanceFrequency(&freq); | |
LARGE_INTEGER start, end; | |
printf("foreach \n"); | |
QueryPerformanceCounter(&start); | |
int count = 0; | |
for_each(array.begin(), array.end(), Hoge); | |
QueryPerformanceCounter(&end); | |
double time = static_cast<double>(end.QuadPart - start.QuadPart) * 1000.0 / freq.QuadPart; | |
printf("time %lf[ms]\n", time); | |
} |
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