timeseq.py

#!/usr/bin/env python
# from the book learning python
# python 3

import sys, timer
reps = 10000
repslist = range(reps)

def forLoop():
    res = []
    for x in repslist:
        res.append(abs(x))
    return res

def listComp():
    return [abs(x) for x in repslist]

def mapCall():
    return list(map(abs, repslist))

def genExpr():
    return list(abs(x) for x in repslist)

def genFunc():
    def gen():
        for x in repslist:
            yield abs(x)
    return list(gen())

print(sys.version)
for test in (forLoop, listComp, mapCall, genExpr, genFunc):
    elapsed, result = timer.timer(test)
    print ('-' * 33)
    print ('%-9s: %.5f => [%s...%s]' % (test.__name__, elapsed, result[0], result[-1]))