Python reliability?

[OttoBit]

Hello everyone.
I just wrote (well, I would say copy and paste for the most part) a few lines of code as follow in order to test efficiency:

import time
start = time.time()

a = range(100000)
b = []
for i in a:
b.append(i*2)

# a = range(100000)
# b = [i*2 for i in a]

end = time.time()
print(end - start)

as you can see, there are 2 'for' loops, one inside the list (inactive as a comment), the other outside. It's the classical example to display "good" VS "bad" coding method. But here's my issue. I ran both loops in Python 3.7, but the the "good" version is giving 0.0 as result. I tested the same code with Spyder 3 (Anaconda) and it seems working fine with resonable results (one is/should be twice the other).
Could you help me and tell me where I'm making a mistake?
Thank you for your time.

Cheers,

OttoBit