本文介绍了Python中的列表或字典是否更快?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
How much of a difference are these two as far as performance?
tmp = []
tmp.append(True)
print tmp[0]
And
tmp = {}
tmp[0] = True
print tmp[0]
推荐答案
标准库中的 timeit
设计只是为了回答这样的问题!忘记 print
(这会对您的终端产生不利的副作用;-)并比较:
The timeit
module in the standard library is designed just to answer such questions! Forget the print
(which would have the nasty side effect of spewing stuff to your terminal;-) and compare:
$ python -mtimeit 'tmp=[]; tmp.append(True); x=tmp[0]'
1000000 loops, best of 3: 0.716 usec per loop
$ python -mtimeit 'tmp={}; tmp[0]=True; x=tmp[0]'
1000000 loops, best of 3: 0.515 usec per loop
所以,dict是赢家 - 0.2微秒...! - )
So, the dict is the winner -- by 0.2 microseconds...!-)
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