Re: x86/asm: __clear_user() micro-optimization (was: "Re: [GIT PULL] x86/asm changes for v4.18")

From: Linus Torvalds
Date: Tue Jun 05 2018 - 13:33:12 EST

On Tue, Jun 5, 2018 at 10:22 AM Alexey Dobriyan <adobriyan@xxxxxxxxx> wrote:
> Tested? :^) I had P4 maybe ~15(?) years ago.

Did you EVEN test it on what you have today?

Do you have any numbers at all, in other words?

Micro-optimizations need numbers. Otherwise they aren't
micro-optimizations, they are just "change code randomly".