@@ -795,7 +795,8 @@ which incur interpreter overhead.
795795 return chain.from_iterable(repeat(tuple(iterable), n))
796796797797 def dotproduct(vec1, vec2):
798- return sum(map(operator.mul, vec1, vec2))
798+ "Compute a sum of products."
799+ return sum(starmap(operator.mul, zip(vec1, vec2, strict=True)))
799800800801 def convolve(signal, kernel):
801802 # See: https://betterexplained.com/articles/intuitive-convolution/
@@ -807,7 +808,7 @@ which incur interpreter overhead.
807808 window = collections.deque([0], maxlen=n) * n
808809 for x in chain(signal, repeat(0, n-1)):
809810 window.append(x)
810- yield sum(map(operator.mul, kernel, window))
811+ yield dotproduct(kernel, window)
811812812813 def polynomial_from_roots(roots):
813814 """Compute a polynomial's coefficients from its roots.