Re: Enabling native compilation by default when libgccjit is present

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Sun, 05 Dec 2021 20:40:43 +0100
> Cc: emacs-devel@gnu.org
> 
> But still, even when that's done correctly, the nativecomp speedups are
> pretty elusive in real world code.  For instance, I'd expect shr
> rendering to be significantly speeded up when doing table-based layouts,
> because it's doing a lot of...  stuff.  But:
> 
> (benchmark-run 10 (eww-open-file "/tmp/foo.html"))
> 
> stubbornly takes the same amount of time with or without nativecomp,
> and it's the same way with every real bit of code I've tested (like byte
> compilation, which I'd also expect to be faster with nativecomp).

Profile it.  In my testing, 2/3 of the time is taken by GC, and
nativecomp cannot possibly speed up that.