Pre-allocate memory to reduce the number of allocations (#272)

datastructure/queue/arrayqueue.go

@@ -31,7 +31,7 @@ func NewArrayQueue[T any](capacity int) *ArrayQueue[T] {
 
 // Data return slice of queue data
 func (q *ArrayQueue[T]) Data() []T {
-	items := []T{}
+	items := make([]T, 0, q.tail-q.head)
 	for i := q.head; i < q.tail; i++ {
 		items = append(items, q.data[i])
 	}

datastructure/queue/linkedqueue.go

@@ -27,7 +27,7 @@ func NewLinkedQueue[T any]() *LinkedQueue[T] {
 
 // Data return slice of queue data
 func (q *LinkedQueue[T]) Data() []T {
-	res := []T{}
+	res := make([]T, 0, q.length)
 	current := q.head
 
 	for current != nil {