Linux C++ generate via uuid_generate_time,uuid_generate_time_safe,uuid_generate,uuid_generate_random

#include <chrono>
#include <iostream>
#include <uuid/uuid.h> 
using namespace std;

void uuid_generatenewUUID(int x);
void uuid_generate_randomnewUUID(int x);
void uuid_generate_timenewUUID(int x);
void uuid_generate_timeSafenewUUID(int x);
void testUuid_generate_timeSafe(int x);

int main(int args,char**argv)
{
    int x=atoi(argv[1]);
    uuid_generatenewUUID(x);
    uuid_generate_randomnewUUID(x);
    uuid_generate_timenewUUID(x);
    uuid_generate_timeSafenewUUID(x);
    // testUuid_generate_timeSafe(x);
    
}

void testUuid_generate_timeSafe(int x)
{
    char* uuidValue=(char*)malloc(40);
    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();
        uuid_t newUUID;
        uuid_generate_time(newUUID);
        uuid_unparse(newUUID,uuidValue);
        endTime=chrono::steady_clock::now();
        cout<<i<<","<<uuidValue<<","<<chrono::duration_cast<chrono::nanoseconds>(endTime-startTime).count()<<" nanos!"<<endl;
    }
}

void uuid_generate_timeSafenewUUID(int x)
{
    cout<<"In uuid_generate_timeSafenewUUID!"<<endl;
    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_time_safe(newUUID);
        }
        endTime=chrono::steady_clock::now();
        cout<<i<<","<<chrono::duration_cast<chrono::milliseconds>(endTime-startTime).count()<<" milliseconds!"<<endl;
    }
}

void uuid_generate_timenewUUID(int x)
{
    cout<<"In uuid_generate_timenewUUID!"<<endl;
    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_time(newUUID);
        }
        endTime=chrono::steady_clock::now();
        cout<<i<<","<<chrono::duration_cast<chrono::milliseconds>(endTime-startTime).count()<<" milliseconds!"<<endl;
    }
}

void uuid_generatenewUUID(int x)
{
    cout<<"In uuid_generatenewUUID"<<endl;
    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;
    }
}

void uuid_generate_randomnewUUID(int x)
{
    cout<<"In uuid_generate_randomnewUUID"<<endl;
    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_random(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

 Referenced  https://www.man7.org/linux/man-pages/man3/uuid_generate.3.html#:~:text=The%20uuid_generate%20%28%29%20function%20creates%20a%20new%20universally,from%20getrandom%20%282%29%2C%20%2Fdev%2Furandom%2C%20or%20%2Fdev%2Frandom%20if%20available.

标签：uuid,int,startTime,time,endTime,generate
来源： https://www.cnblogs.com/Fred1987/p/16519175.html