bug#17219: 24.3.50; wrong alignment when a list is given to dired

[Charalampos Mitrodimas]

Thanks Jakub!

On 12/23/24 19:52, Jakub Ječmínek via Bug reports for GNU Emacs, the 
Swiss army knife of text editors wrote:
> Hello,
>
> "Charalampos Mitrodimas" <charmitro@posteo.net> writes:
>
> > What about performance? Depending on the size of the directory,
> > recalculating alignment could have a minor performance impact.
> There is. The largest directory I have on my machine has around 18k
> files (~5GB) and the penalty is around 20ms. I've run the tests for both
> functions in standalone Emacs session started using 'emacs -Q'. Below
> are the profiling results:
>
> Function Name     Call Count  Elapsed Time  Average Time
> --------------------------------------------------------
> dired-revert-new  10          5.2096629750  0.5209662975
> dired-revert-old  10          5.051716523   0.5051716522
>
> dired-revert-new  25          11.843308944  0.4737323577
> dired-revert-old  25          11.391448779  0.4556579511
>
>
> Please let me know if that's too high so we can find another way.
If my math doesn't deceive me, the performance penalty ranges
between 3.13% (10 calls) and 3.97% (25 calls) based on the profiling
results, which I find acceptable.


--
C. Mitrodimas