Interesting! The previous example I posted was Python 2.7.12 on Ubuntu 16.04.01. Here is OSX 10.11.5 w/Python 2.7.10 (also inconclusive with respect to speed,

Interesting! The previous example I posted was Python 2.7.12 on Ubuntu 16.04.01. Here is OSX 10.11.5 w/Python 2.7.10 (also inconclusive with respect to speed, but OSX was half the memory): mb:~ doug$ ./listtuple The tuple's size is 40028 and the list's size is 40036 Iterating through a 10,000 element list took 0.00113916397095 seconds. Iterating through a 10,000 element tuple took 0.00111603736877 seconds. mb:~ doug$ ./listtuple The tuple's size is 40028 and the list's size is 40036 Iterating through a 10,000 element list took 0.00126791000366 seconds. Iterating through a 10,000 element tuple took 0.00133585929871 seconds. mb:~ doug$ ./listtuple The tuple's size is 40028 and the list's size is 40036 Iterating through a 10,000 element list took 0.00114607810974 seconds. Iterating through a 10,000 element tuple took 0.00117492675781 seconds.