Go FIFO Queue: Slice vs. Heap vs. List – Which Container is Best?

FIFO Queue in Go: Which Container to Choose?

When implementing a FIFO (First-In-First-Out) queue in Go, one may consider utilizing built-in containers such as heap, list, or vector. However, for a simple and fast realization, the slice container offers a suitable solution.

Slices are dynamic arrays that provide efficient memory management. In the context of a queue, slices can be manipulated to achieve FIFO behavior. The following code demonstrates a basic queue implementation using a slice:

queue := make([]int, 0)

// Push to the queue
queue = append(queue, 1)

// Top (just get next element, don't remove it)
x := queue[0]

// Discard top element
queue = queue[1:]

// Is empty?
if len(queue) == 0 {
    fmt.Println("Queue is empty !")
}

It is important to note that this approach assumes the reliable inner implementation of append and slicing to avoid unnecessary resizing and reallocation. Consequently, it proves sufficient for standard queue operations, providing a straightforward and efficient solution.

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