execution speed changes by sequence of running the code
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the question updated: the sequence of running different codes changes the run time.
initially it appeared to be due to difference in file name: any similar experience? changing the function name is changing the execution time (picture attached).
Steven Lord il 4 Apr 2017
There is some first run overhead (see the "Tips for Measuring Performance" section of that page.) So if you compare the Nth (N > 1) run of one function and the 1st run of another function that contains the same code in a different file, in the latter case you'll measure the overhead in addition to the execution of the code.