list_comp vs. map

micro.py

#! /usr/bin/env python
import timeit

def main():
    list_comp_t = timeit.Timer("y = [math.log10(num) for num in x]", setup="import math; x = [1500, 1049.8, 34, 351]")
    map_t = timeit.Timer("z = map(math.log10, x)", setup="import math; x = [1500, 1049.8, 34, 351]")
# Use an absurdly high number of reps because the data is tiny and I want the numbers to be on a reasonably human timescale.
    print list_comp_t.timeit(1000000)
    print map_t.timeit(1000000)

if __name__ == '__main__':
    main()
    main()
    main()