Subject: Re: bug#45607: 27.1; compiled replace-string breaks repeat-complex-command

From: Juri Linkov <[email-masked]>
Date: Sat, 13 Aug 2022 22:30:50 +0300

>> OTOH, `duplicate-dwim' is optimized to call `use-region-p' only once:
>>
>>   (cond
>>    ((use-region-p)
>>     (let* ((beg (region-beginning))
>>            (end (region-end))
>
> I don't think that makes much difference when it comes to interactive
> specs:
>
> (benchmark-run 1000000 (use-region-p))
> => (0.038645288 0 0.0)
>
> If you're calling `duplicate-dwim' interactively more than a million
> times a second, you'll get a slowdown of a couple hundredths of a
> second.

But still `use-region-p' is used to start a new logical branch of `cond'.