python : timeit - Tool for measuring execution time

Ganesh Pal ganesh1pal at
Wed Apr 22 05:31:22 CEST 2015

Hi Team,

Iam running the below command on Linux machine have Python 2.7
installed , I was trying to figure out the speed difference between
xrange and range functions.

range :

python -m timeit 'for i in range(1000000):' ' pass'
10 loops, best of 3: 90.5 msec per loop

$ python -m timeit 'for i in xrange(1000000):' ' pass'
10 loops, best of 3: 51.1 msec per loop

Iam not able to understand what  why only 10 loops were run ? what
does this mean and how  does this work ?


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