from itertools import chain
from timeit import timeit
 
var ='sans' * 1000
 
res = [var[:i] +' '+ var[i:] for i in range(len(var))]
 
def RoadRunner():
    return list(chain.from_iterable(map(str.split, res)))
 
def StefanPochmann():
    return [s for r in res for s in r.split()]
 
def pault():
    return " ".join(res).split()
 
def Dekel():
    return [x for y in [res[i].split() for i in range (len(res))] for x in y]
 
n = 40
print("RoadRunner time:", timeit(RoadRunner, number = n))
print("pault time:", timeit(pault, number = n))
print("Dekel time:", timeit(Dekel, number = n))
print("StefanPochmann time:", timeit(StefanPochmann, number = n))
 

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