Awesome

MemoryExtensions 　

High performance buffer types such as IArrayOwner<T>, RecyclableBufferWriter<T>, ResizableBufferWriter<T>, MemoryBufferWriter<T>, BufferReader

<PackageReference Include="MemoryExtensions" Version="1.0.3" />

ArrayPool & IArrayOwner

var arrayOwner = ArrayPool.Rent<byte>(10);
// var arrayOwner = ArrayPool<byte>.Shared.RentArrayOwner(10);
for (var i = 0; i < arrayOwner.Length; i++)
{
    arrayOwner.Array[i] = (byte)i;
}

// return the array to pool
arrayOwner.Dispose();

RecyclableBufferWriter

var writer = new RecyclableBufferWriter<byte>(4);
writer.Write((byte)1);
writer.Write(new byte[] { 2, 3, 4 });
writer.WriteBigEndian(int.MaxValue);           
var writtern = writer.WrittenSpan; // 1,2,3,4,127,255,255,255

// return the buffer to pool
writer.Dispose();

ResizableBufferWriter

var writer = new ResizableBufferWriter<byte>(4);
writer.Write((byte)1);
writer.Write(new byte[] { 2, 3, 4 });
writer.WriteBigEndian(int.MaxValue);           
var writtern = writer.WrittenSpan; // 1,2,3,4,127,255,255,255

MemoryBufferWriter & BufferReader

var array = new byte[16];

var writer = array.CreateWriter();
// var writer = new MemoryBufferWriter(array);
writer.WriteBigEndian(18);
writer.WriteBigEndian(2.01f);

var reader = new BufferReader(array);
reader.ReadBigEndian(out int v1);
reader.ReadBigEndian(out float v2);

IMemoryOwner Slice

var owner = MemoryPool<byte>.Shared.Rent(10);
new byte[] { 1, 2, 3, 4 }.CopyTo(owner.Memory.Span);
var sliced = owner.Slice(0, 2); // 1,2

// return the memory to pool
sliced.Dispose();