import timeit
n = 6
code1 = "'%s' %% (%s)" % (":".join(("%s",)*n), ",".join(("s",)*n))
time1 = timeit.timeit(code1, setup="s='ff'")
code2 = "+':'+".join(("s",)*n)
time2 = timeit.timeit(code2, setup="s='ff'")
print("""\
code1=%s
time1=%s
code2=%s
time2=%s
time1/time2 = %s
""" % (code1, time1, code2, time2, time1/time2))
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