On 19/06/2018 11:33, Steven D'Aprano wrote:
On Tue, 19 Jun 2018 10:19:15 +0100, Bart wrote:
* Integer sets (Pascal-like sets)
Why do you need them if you have real sets?
I tried Python sets for the first time. They seemed workable but rather
clunky to set up. But here is one problem on my CPython:
x = set(range(10_000_000))
This used up 460MB of RAM (the original 100M I tried exhausted the memory).
The advantage of Pascal-style sets is that that same set will occupy
only 1.25MB, as it is a bit-map.
While sets will not usually be that big, there might be lots of small
sets and they all add up.
Assuming that people who aren't you can even get it to compile. When I
tried, it wouldn't compile on my computer.
(It won't any more, as there is no C version. I've had it with that
language.)
--
bart
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