Stefan Behnel wrote:
Hugo Arts, 08.11.2010 00:53:
[...]
On another note, getting rid of the list comprehension and using a
generator expression will be even faster, since you won't have to
build the list.
I gave this suggestion a try. It is true for me when run in CPython 3.2:
[...]
However, it is no longer true when I run the same thing in Cython:
[...]
Lesson learned:
Sometimes, it can be worth splitting a loop in two, one with a tight
filter for the values, and another one to work on the remaining values.
Nice analysis, thank you. However, surely the most important lesson to
be learned is:
Don't make assumptions about what is faster, measure it and find out!
--
Steven
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