Benchmark String Building

benchmark.py

'test concatenation, substitution, join'
import timeit

DOMAIN = 'http://stackoverflow.com'
QUESTIONS = '/questsions'

def so_q_sub(n):
    return '%s%s/%d' % (DOMAIN, QUESTIONS, n)

def so_q_cat(n):
    return DOMAIN + QUESTIONS + '/' + str(n)

def so_q_join(n):
    return ''.join([DOMAIN, QUESTIONS, '/', str(n)])

if __name__ == '__main__':
    print 'Substitution:'
    print timeit.timeit('so_q_sub(1000)', 'from __main__ import so_q_sub')
    print 'Concatentation:'
    print timeit.timeit('so_q_cat(1000)', 'from __main__ import so_q_cat')
    print 'Join:'
    print timeit.timeit('so_q_join(1000)', 'from __main__ import so_q_join')

# output on my machine:
# Substitution:
# 1.0587220192
# Concatenation:
# 0.573312997818
# Join:
# 0.879829883575