# timeit_string_concatenation.py

# timeit_string_concatenation.py

import timeit

s = 'hello'
t = 'world'
str_dict = {'t': t, 's': s}

test = '''
s + ' ' + t
' '.join((s, t))
'%s %s' % (s, t)
'{} {}'.format(s, t)
'{0} {1}'.format(s, t)
'{str1} {str2}'.format(str1=s, str2=t)
'{s} {t}'.format(**globals())
'%(s)s %(t)s' % str_dict
'{s} {t}'.format(**str_dict)
'''[1:-1].splitlines()

def fn(x=0):
    if x:
        return test[z]
    return eval(test[z])

iterations = 10000
for z in xrange(len(test)):
    repeat = []
    print fn(1)+' = "'+fn()+'"'
    for n in xrange(10):
        x = 'from __main__ import fn; fn()'
        ttt = timeit.Timer(x)
        x = ttt.timeit(iterations)
        repeat += [x]
    x = min(repeat)
    print 'took {} seconds : best out of {}'.format(x,len(repeat))
    print