IPython 中用 magic 命令 %timeit 來計時。
比較生成速度
%timeit [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]
1000000 loops, best of 3: 456 ns per loop
%timeit (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25)
10000000 loops, best of 3: 23 ns per loop
可以看到，元組的生成速度要比列表的生成速度快得多，相差大概一個數量級。
比較遍歷速度
產生內容相同的隨機列表和元組：
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from numpy.random import rand
values = rand(10000,4)
lst = [list(row) for row in values]
tup = tuple(tuple(row) for row in values)
%timeit for row in lst: list(row)
100 loops, best of 3: 4.12 ms per loop
%timeit for row in tup: tuple(row)
100 loops, best of 3: 2.07 ms per loop
在遍歷上，元組和列表的速度表現差不多。
比較遍歷和索引速度：
%timeit for row in lst: a = row[0] + 1
The slowest run took 12.20 times longer than the fastest. This could mean that an intermediate result is being cached
100 loops, best of 3: 3.73 ms per loop
%timeit for row in tup: a = row[0] + 1
100 loops, best of 3: 3.82 ms per loop
元組的生成速度會比列表快很多，迭代速度快一點，索引速度差不多。