On Wed, Dec 21, 2022 at 8:34 AM Jeremiah Paige <[email protected]> wrote:
> That's interesting, for me both 3.9 and 3.10 show the f-string more than
> 5x faster.
> This is just timeit on f'{myvar}' vs ''.join((myvar,)) so it may not be
> the most nuanced
> comparison for a class property.
> Probably unsurprisingly having myvar be precomputed as the single tuple
> also
> gives speedups, around 45% for me.
>
That may be the optimization that 3.11 is doing for you :-)
Now that I think about it, if this is immutable, which it should be, as
it's a str subclass, then perhaps the data string can be pre-computed, as
it was in the original. I liked the property, as philosophically, you don't
want to store the same data twice, but with an immutable, there should be
no danger of it getting out of sync, and it would be faster. (though memory
intensive for large strings).
-CHB
> So if just speed is wanted maybe inject the
> tuple pre-constructed.
>
> ~ Jeremiah
>
> On Wed, Dec 21, 2022 at 1:19 AM Steven D'Aprano <[email protected]>
> wrote:
>
>> On Tue, Dec 20, 2022 at 11:55:49PM -0800, Jeremiah Paige wrote:
>> > @property
>> > def data(self):
>> > return f"{self}"
>>
>> By my testing, on Python 3.10, this is slightly faster still:
>>
>> @property
>> def data(self):
>> return "".join((self,))
>>
>> That's about 14% faster than the f-string version.
>>
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--
Christopher Barker, PhD (Chris)
Python Language Consulting
- Teaching
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