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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 10 Jan 2024 11:35:05 -0800
Message-ID: <CAHk-=wj1uqgU7hS=WqDSwEvc6=CwuWYBUmjSJAT6zx86CF=QBQ@mail.gmail.com>
Subject: Re: [PATCH next v4 0/5] minmax: Relax type checks in min() and max().
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Jiri Slaby <jirislaby@gmail.com>, David Laight <David.Laight@aculab.com>, 
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, 
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>, 
	Andrew Morton <akpm@linux-foundation.org>, "Matthew Wilcox (Oracle)" <willy@infradead.org>, 
	Christoph Hellwig <hch@infradead.org>, "Jason A. Donenfeld" <Jason@zx2c4.com>
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On Tue, 9 Jan 2024 at 22:17, Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> > Can somebody else confirm similar time differences? Or is it just me?
>
> I was hopeful, but:

Yeah, my build times seem to be very unstable for some reason, and
seem to fluctuate fairly widely. I'm not sure what triggers it.

The min/max simplification helps, but I think my "big change" thing
was mostly due to other fluctuations.

It would be lovely to have some performance automation to find build
time regressions, although at least for me, one source of regressions
tends to be system updates with new compilers ;(

            Linus