python 3, 字符串连接速度

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对比字符串连接速度，可以发现，字符串少时， +快；
字符串多时， join快

from time import timedef method1():    t = time()    for i in range(100000):        s = 'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'    t1 = time()    print ("Time %f" % (t1 - t))def method2():    t = time()    for i in range(100000):        s = ''.join(['hiweeds','hiweeds','hiweeds','hiweeds','hiweeds','hiweeds','hiweeds','hiweeds','hiweeds','hiweeds'])    print (time() - t)print ('hello World')method1()method2()def method3():    t = time()    for i in range(100000):        s = 'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'    t1 = time()    print ("Time %f" % (t1 - t))def method4():    t = time()    for i in range(100000):        s = ''.join(['hiweeds','hiweeds','hiweeds','hiweeds'])    print (time() - t)print ('hello World')method3()method4()

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