Do you know ArrayPool?

ArrayPool<T> is a class in .NET designed for efficient management of arrays, allowing reuse of arrays instead of frequent allocation and deallocation of memory. This reduces the load on the garbage collector and improves performance, especially in scenarios with intensive creation of temporary arrays.

Main points:

• Allows renting an array of the needed size via the Rent(int minimumLength) method.
• After use, the array should be returned to the pool via Return(T[] array).
• Rented arrays can be larger than the requested size.
• It is not guaranteed that the array will be cleared upon renting, so you may need to manually zero out the contents if necessary.

Example usage:

using System.Buffers;

var pool = ArrayPool<byte>.Shared;
byte[] buffer = pool.Rent(1024); // rent an array with a minimum length of 1024

try
{
    // Use buffer
}
finally
{
    pool.Return(buffer); // return the array to the pool
}

ArrayPool is useful for optimizing work with temporary buffers, for example, when working with streams, serialization, parsing, etc.