Chris Angelico wrote:
> On Fri, Jul 26, 2013 at 5:07 AM, <wxjmfa...@gmail.com> wrote:
> > Let start with a simple string \textemdash or \texttendash
> >
> >>>> sys.getsizeof('-')
> > 40
> >>>> sys.getsizeof('a')
> > 26
>
> Most of the cost is in those two apostrophes, look:
>
> >>> sys.getsizeof('a')
> 26
> >>> sys.getsizeof(a)
> 8
>
> Okay, that's slightly unfair (bonus points: figure out what I did to
> make this work; there are at least two right answers) but still, look
> at what an empty string costs:
I like bonus points. :)
>>> a = None
>>> sys.getsizeof(a)
8
Not sure what the other right answer is...booleans take 12 bytes (on 2.6)
>
> >>> sys.getsizeof('')
> 25
>
> Or look at the difference between one of these characters and two:
>
> >>> sys.getsizeof('aa')-sys.getsizeof('a')
> 1
> >>> sys.getsizeof('--')-sys.getsizeof('-')
> 2
>
> That's what the characters really cost. The overhead is fixed. It is,
> in fact, almost completely insignificant. The storage requirement for
> a non-ASCII, BMP-only string converges to two bytes per character.
>
> ChrisA
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Ramit
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