python 多种字符串连接性能测试

str_speed_test.py

#!/usr/bin/env python
# encoding: utf-8
"""
@author: zmh
@time: 2018/6/30 10:29
"""
import threading
import time


def str1():
    thread_name = threading.current_thread().getName()
    start = time.clock()
    for i in list(range(100000)):
        a = 'python'
        b = 'str'
        r = a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b + a + b
    end = time.clock()
    print('%s:加号:所费时间:%.4f' % (thread_name, end - start))


def str2():
    thread_name = threading.current_thread().getName()
    start = time.clock()
    for i in list(range(100000)):
        a = 'python'
        b = 'str'
        r = '%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s' % (a, b, a, b, a, b, a, b, a, b, a, b, a, b, a, b, a, b, a, b)
    end = time.clock()
    print('%s:操作符:所费时间:%.4f' % (thread_name, end - start))


def str3():
    thread_name = threading.current_thread().getName()
    start = time.clock()
    for i in list(range(100000)):
        a = 'python'
        b = 'str'
        r = '{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}'.format(a, b, a, b, a, b, a, b, a, b, a, b, a, b, a, b, a, b, a, b)
    end = time.clock()
    print('%s:format方法:所费时间:%.4f' % (thread_name, end - start))


def str4():
    thread_name = threading.current_thread().getName()
    start = time.clock()
    for i in list(range(100000)):
        a = 'python'
        b = 'str'
        r = f'{a}{b}{a}{b}{a}{b}{a}{b}{a}{b}{a}{b}{a}{b}{a}{b}{a}{b}{a}{b}'
    end = time.clock()
    print('%s:f-string:所费时间:%.4f' % (thread_name, end - start))


def str5():
    thread_name = threading.current_thread().getName()
    start = time.clock()
    for i in list(range(100000)):
        a = 'python'
        b = 'str'
        r = ''.join([a, b, a, b, a, b, a, b, a, b, a, b, a, b])
    end = time.clock()
    print('%s:str.join:所费时间:%.4f' % (thread_name, end - start))


if __name__ == '__main__':
    t1 = threading.Thread(target=str1, name='thread 1')
    t1.start()

    t2 = threading.Thread(target=str2, name='thread 2')
    t2.start()

    t3 = threading.Thread(target=str3, name='thread 3')
    t3.start()

    t4 = threading.Thread(target=str4, name='thread 4')
    t4.start()

    t5 = threading.Thread(target=str5, name='thread 5')
    t5.start()