Implementing Stacks & Queues

What optimization technique is implemented in this queue?

class Queue {
  constructor() {
    this.elements = [];
    this.maxSize = 1000;
    this.head = 0;
    this.tail = 0;
  }
  
  enqueue(element) {
    if (this.tail - this.head >= this.maxSize) {
      this.elements = this.elements.slice(this.head, this.tail);
      this.tail -= this.head;
      this.head = 0;
    }
    this.elements[this.tail] = element;
    this.tail++;
  }
}

Memory preallocation
Periodic compaction
This implements periodic compaction by: 1) Detecting when queue reaches maximum size, 2) Removing empty spaces from dequeued elements, 3) Resetting head and tail pointers, 4) Preventing array from growing indefinitely, 5) Balancing between memory usage and performance, 6) Amortizing cost of array cleanup, 7) Important for long-running queue operations, 8) Common optimization in production systems.
Dynamic resizing
Lazy deletion

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