ITERS=10000000
AVERAGE=3

def bench(fn):
    import time

    records = []
    for _ in range(AVERAGE):
        t = time.time()
        fn()
        records.append( time.time() - t )
    print fn.__name__, sum(records) / float(len(records))

def outter():
    var = 'pika'
    for _ in xrange(ITERS):
        var + ''

def inner():
    for _ in xrange(ITERS):
        'pika' + ''

for n in range(3):
    bench(outter)
    bench(inner)