Faster logging

Logging1.cs

using System;
using System.Diagnostics;

class Program
{
    static void Main(string[] args)
    {
        var logger = new MyLogger();
        var sw = Stopwatch.StartNew();
        for (int i = 0; i < 50000; i++)
        {
            logger.Print("{'Timestamp':'" + DateTimeOffset.Now.ToString("o") + "','Level':'Information','MessageTemplate':'Hello, {@User}, {N} at {Now}','Properties':{'User':{'Name':'nblumhardt','Tags':[1,2,3]},'N':555,'Now':'2021-05-17T14:51:13.8962062+03:00'}}\n");
        }
        Console.WriteLine(sw.Elapsed);
        Thread.Sleep(5000);
    }
}

class MyLogger
{
    public void Print(string message)
    {
        Console.Write(message);
    }
}

Logging2.cs

using System;
using System.Diagnostics;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

class Program
{
    static void Main(string[] args)
    {
        var logger = new MyLogger();
        var sw = Stopwatch.StartNew();
        for (int i = 0; i < 50000; i++)
        {
            logger.Print("{'Timestamp':'" + DateTimeOffset.Now.ToString("o") + "','Level':'Information','MessageTemplate':'Hello, {@User}, {N} at {Now}','Properties':{'User':{'Name':'nblumhardt','Tags':[1,2,3]},'N':555,'Now':'2021-05-17T14:51:13.8962062+03:00'}}\n");
        }
        Console.WriteLine(sw.Elapsed);
        Thread.Sleep(5000);
    }
}

class MyLogger
{
    private volatile StringBuilder _buffer = new(80000);

    public MyLogger()
    {
        RunJob();
    }
    
    public void Print(string message)
    {
        _buffer.Append(message);
    }
    
    private void RunJob()
    {
        _ = Task.Run(async () =>
        {
            while (true)
            {
                if (_buffer.Length > 0)
                {
                    StringBuilder buffer;
                    lock (_buffer)
                    {
                        buffer = _buffer;
                        _buffer = new(80000);
                    }
                    var output = Console.Out;
                    await output.WriteAsync(buffer.ToString());
                    await output.FlushAsync();
                }
                else
                {
                    Console.WriteLine($"Maybe ended {DateTime.Now:o}");
                    await Task.Delay(500);
                }
            }
        });
    }
}