EgorBot for PranavSenthilnathan in #111332 #231

using BenchmarkDotNet.Attributes;
using System.Buffers;
using System.Text.Json;
using System.Text;
using BenchmarkDotNet.Running;

BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run(args);

public class Perf_ParseThenWrite
{
    const string jsonString =
"""
{
    "tags": [
      "culpa",
    "laboris",
    "nulla",
    "exercitation",
    "do",
    "pariatur",
    "occaecat",
    "aliquip",
    "est",
    "et",
    "officia",
    "minim",
    "quis",
    "est",
    "ullamco",
    "consequat",
    "id",
    "esse",
    "irure",
    "reprehenderit",
    "proident",
    "labore",
    "et",
    "in",
    "consequat",
    "officia",
    "exercitation",
    "aute",
    "do",
    "consequat",
    "laborum",
    "officia",
    "consectetur",
    "deserunt",
    "ex",
    "do",
    "nostrud",
    "deserunt",
    "consectetur",
    "adipisicing",
    "et",
    "non",
    "veniam",
    "dolor",
    "Lorem",
    "sunt",
    "amet",
    "cillum",
    "excepteur",
    "mollit"
    ]
}
""";

    private byte[] _dataUtf8;
    private Utf8JsonWriter _writer;

    public bool IsDataIndented = true;

    [GlobalSetup]
    public void Setup()
    {
        _dataUtf8 = Encoding.UTF8.GetBytes(jsonString);

        var abw = new ArrayBufferWriter<byte>();
        _writer = new Utf8JsonWriter(abw, new JsonWriterOptions { Indented = IsDataIndented });
    }

    [GlobalCleanup]
    public void CleanUp()
    {
        _writer.Dispose();
    }

    [Benchmark]
    public void ParseThenWrite()
    {
        _writer.Reset();

        using (JsonDocument document = JsonDocument.Parse(_dataUtf8))
        {
            document.WriteTo(_writer);
        }
    }
}