Re: Any interest in a function like this to add to subr.el?

[Dmitry Gutov]

On 19.10.2016 17:48, Stefan Monnier wrote:
> > We'd want a destructive version of it as well, though.
>
> Why?

I was thinking for performance.

But yeah, we should probably benchmark the two versions on multiple 
inputs, and only keep the destructive version if it's indeed noticeably 
faster on some (like big lists where the predicate costs on the order of 
the magnitude of allocating a new cons).