A benchmark of the NBT serializer.

Raspite.cs

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using Raspite.Library;

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

[MemoryDiagnoser]
public class Benchmark
{
    private byte[] source;

    [GlobalSetup]
    public async Task SetupAsync()
    {
        var tag = new NbtTag.Compound()
        {
            Name = "Parent",
            Children = new NbtTag[]
            {
                new NbtTag.Compound()
                {
                    Name = "Numbers",
                    Children = new NbtTag[]
                    {
                        new NbtTag.Byte()
                        {
                            Name = nameof(NbtTag.Byte),
                            Value = byte.MaxValue
                        },
                        new NbtTag.Short()
                        {
                            Name = nameof(NbtTag.Short),
                            Value = short.MaxValue
                        },
                        new NbtTag.Int()
                        {
                            Name = nameof(NbtTag.Int),
                            Value = int.MaxValue
                        },
                        new NbtTag.Long()
                        {
                            Name = nameof(NbtTag.Long),
                            Value = long.MaxValue
                        },
                        new NbtTag.Compound()
                        {
                            Name = "Special",
                            Children = new NbtTag[]
                            {
                                new NbtTag.Float()
                                {
                                    Name = nameof(NbtTag.Float),
                                    Value = float.MaxValue
                                },
                                new NbtTag.Double()
                                {
                                    Name = nameof(NbtTag.Double),
                                    Value = double.MaxValue
                                }
                            }
                        }
                    }
                },
                new NbtTag.String()
                {
                    Name = nameof(NbtTag.String),
                    Value = nameof(Raspite)
                }
            }
        };

        source = await NbtSerializer.DeserializeAsync(tag);
    }

    [Benchmark]
    public async Task SerializeAsync()
    {
        var _ = await NbtSerializer.SerializeAsync(source);
    }
}

// |         Method |     Mean |   Error |  StdDev |   Gen0 | Allocated |
// |--------------- |---------:|--------:|--------:|-------:|----------:|
// | SerializeAsync | 751.3 ns | 3.91 ns | 3.47 ns | 0.3109 |   1.27 KB |