Why tuples are better than lists in python

Use immutable objects (tuples, collections) in place of mutable ones (lists) in Python. They provide better logic (since they won’t change on you in the rest of the code) and are way speedier.

Python lists are basically an arraylist with each node referencing the actual object instead of encapsulating it. So iteration on the object requires a bunch more jumping around in memory.

Check out the following toy example:

$ python -m timeit "x=(1,2,3,4)+(5,6,7,8)"
50000000 loops, best of 5: 6.44 nsec per loop

$ python -m timeit "x=[1,2,3,4]+[5,6,7,8]"
5000000 loops, best of 5: 80.3 nsec per loop