RE: [PATCH v1 1/4] pinctrl: intel: optimize set_mux hook

From: Jadav, Raag
Date: Thu Jun 08 2023 - 06:21:22 EST


> On Thu, Jun 08, 2023 at 12:30:14PM +0530, Raag Jadav wrote:
> > Utilize a temporary variable for common shift operation inside
> > ->set_mux() hook and save a few bytes.
> >
> > add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-3 (-3)
> > Function old new delta
> > intel_pinmux_set_mux 245 242 -3
> > Total: Before=10472, After=10469, chg -0.03%
>
> Shouldn't the compiler be able to optimize this if you ask with the -Ox
> options?

Forgot to add. This is with default -O2.
Is it a good idea to mention it?

> I don't really see much benefit for "optimizations" like this. That said using
> temporary variable here improves readability so this one is acceptable by
> me. As long as you change the commit message accordingly.