python 3, 字符串连接速度

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 time

def method1():
    t = time()
    for i in range():
        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():
        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():
        s = 'hiweeds'+'hiweeds'+'hiweeds'+'hiweeds'
    t1 = time()
    print ("Time %f" % (t1 - t))

def method4():
    t = time()
    for i in range():
        s = ''.join(['hiweeds','hiweeds','hiweeds','hiweeds'])
    print (time() - t)

print ('hello World')
method3()
method4()