import timeit

def soma1(x, y):
    return sum(range(x, y+1))

def soma2(x, y):
    soma = 0
    for i in range(x, y+1):
        soma += i
    return soma

x=1
y=1000
t = timeit.Timer("soma1(x,y)", "from __main__ import soma1,x,y")
print (t.repeat(1,10))

t = timeit.Timer("soma2(1,1000)","from __main__ import soma2")
print (t.repeat(1,10))