/******************************************************************************
Online C++ Compiler.
Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.
*******************************************************************************/
#include <iostream>
#include <random>
#include <limits>
#include <map>
#include <chrono>
#include <functional>
#define TIMES 1000000
double get_time()
{
return std::chrono::duration<double>(std::chrono::system_clock::now().time_since_epoch()).count();
}
int number(int v1, int v2)
{
thread_local std::default_random_engine _Generator;
thread_local bool _Init = false;
if (!_Init)
{
_Init = true;
std::random_device dev;
_Generator.seed(dev());
}
std::uniform_int_distribution<int> distribution(v1, v2);
return distribution(_Generator);
}
int random_drop(int min, int max)
{
std::random_device device;
std::mt19937 generator(device());
std::uniform_int_distribution<int> distribution(min, max);
return distribution(generator);
}
double execution_time(std::function<int(int,int)> func)
{
auto now = get_time();
for(int i=0; i < TIMES; i++)
func(0,500);
auto end = get_time();
return end - now;
}
int main()
{
std::cout << "number time : " << execution_time(number) << std::endl;
std::cout << "random_drop time : " << execution_time(random_drop) << std::endl;
}
