What reasons can lead to low performance of a queue implementation based on a list in Python?

The low performance of a list-based queue in Python can be caused by the following reasons:

• Using a regular list (list) for insertions or deletions at the beginning — this is time-consuming because elements are shifted (O(n) operations).
• Not using specialized data structures, such as collections.deque, which is optimized for adding and removing elements from both ends (O(1) operations).
• Frequent copying or slicing of lists, which creates new objects.

For efficient queue implementation, it is better to use collections.deque:

from collections import deque

queue = deque()
queue.append('element')  # add to the end
queue.popleft()            # remove from the beginning

This will significantly improve performance compared to using a list for a queue.