Re: GNU AUCTeX branch, master, updated. 34befcc17649fd6615fd4ef8756fb78705f7fe55

[Arash Esbati]

Hi Tassilo and David,

Tassilo Horn <tsdh@gnu.org> writes:

> Arash Esbati <arash@gnu.org> writes:
>
>> Or am I missing something?
>
> Yes, the performance aspect.  The annotation function might be called
> hundredth or thousands of times, and appending lists is expensive.
>
> ;; The current version
> (benchmark 10000
>            '(LaTeX--completion-annotation-from-math-menu "aleph"))
> "Elapsed time: 0.136648s"
>
> ;; Your proposed version
> (benchmark 10000
>            '(LaTeX--completion-annotation-from-math-menu-with-append "aleph"))
> "Elapsed time: 2.190776s (1.388426s in 18 GCs)"
>
> So here it would almost be a factor of 20 slower.

Thanks for your responses.  I was aware of `append' being expensive, but
I didn't expect the hit being so large for this case.  I should have
tested myself before asking, well, next time :-)

Best, Arash