Simple Array Pool Implementation

ArrayPool.ts

class ArrayPool<T> {
  private _pool: T[][] = [];
  
  private readonly _maxPoolSize: number;

  constructor(maxPoolSize: number = 10) {
    this._maxPoolSize = maxPoolSize;
  }

  // Get an array from the pool, or create a new one if the pool is empty
  public getArray(size: number): T[] {
    const array = this._pool.length > 0 ? this._pool.pop()! : Array.from({ length: size });
    // Ensure the array is the correct size
    array.length = size;
    
    return array;
  }

  // Return an array to the pool
  public returnArray(array: T[]): void {
    if (this._pool.length >= this._maxPoolSize) return;
    // Reset array length to 0
    array.length = 0;
    this._pool.push(array);
  }
}