"Inside STL: The deque, design" by Raymond Chen
https://devblogs.microsoft.com/oldnewthing/20230809-00/
"The C++ standard library deque is a double-ended queue that supports
adding and removing items efficiently at either the front or the back."
"All three of the major implementations of the C++ standard library use
the same basic structure for a deque, but they vary in both policy and
implementation details."
Lynn