Reducing Redundant Calculations

Question

I am experiencing a dilemma. Let me explain it with two functions:

# Takes vector.magnitude(), vector.x, vector.y and uses it somewhere
def func1(vector, {other parameters 1}):
    pass

# Takes vector.magnitude(), vector.x, vector.y and uses it somewhere
def func2(vector, {other parameters 2}):

It is not uncommon that func2 is called right after func1 with the same vector variable. There is a redundant calculation for the vector magnitude, as it is calculated twice. Should the vector magnitude instead be a separate function parameter? If not, what should be changed to alleviate this problem?

Answer 1

Calculating the vector magnitude should be a method of the vector class. Then it can cache and reuse the result as necessary or advisable. Burdening higher-level logic with micro-decisions like this is bad for readability.