Ubuntu C++ uuid_generate vs Windows UuidCreate

1.Ubuntu,g++

#include <chrono>
#include <iostream>
#include <uuid/uuid.h>

using namespace std;

void testTime(int x);

int main(int args,char**argv)
{
    testTime(atoi(argv[1]));
}

void testTime(int x)
{
    chrono::time_point<chrono::steady_clock> startTime;
    chrono::time_point<chrono::steady_clock> endTime;

    for(int i=0;i<x;i++)
    {
        startTime=chrono::steady_clock::now();   
        for(int j=0;j<1000000;j++)
        {
            uuid_t newUUID;
            uuid_generate(newUUID);
        }
        endTime=chrono::steady_clock::now();
        cout<<i<<","<<chrono::duration_cast<chrono::milliseconds>(endTime-startTime).count()<<" milliseconds!"<<endl;
    }
}

Compile

g++ -std=c++2a *.cpp -o h1 -luuid

Run

./h1 10

Snapshot

2.Windows11/VS2022/VC++

#pragma comment(lib, "rpcrt4.lib")
#include <iostream>
#include <chrono>
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <Windows.h>

using namespace std;

int main()
{         
    for (int j = 0;j < 10;j++)
    {
        auto startTime = chrono::system_clock::now();
        for (int i = 0; i < 1000000; i++)
        {
            UUID uuid;
            UuidCreate(&uuid); 
        }
        auto endTime = chrono::system_clock::now();
        auto timeCost = chrono::duration_cast<chrono::milliseconds>(endTime - startTime).count();
        cout <<j<<"," << timeCost << " milliseconds" << endl;
    }
    cin.get();
}