linux-kernel - Re: [PATCH v2] coccinelle: orplus: reorganize to improve performance

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Date:   Thu, 16 Nov 2017 09:03:49 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Julia Lawall <julia.lawall@...6.fr>
Cc:     Michal Marek <michal.lkml@...kovi.net>,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        cocci@...teme.lip6.fr
Subject: Re: [PATCH v2] coccinelle: orplus: reorganize to improve performance

2017-11-13 14:53 GMT+09:00 Julia Lawall <julia.lawall@...6.fr>:
> Adding two #define constants is less common than performing & and |
> operations on them, so put the addition first to reduce the set of cases
> that have to be considered in detail.  At the same time, add & and |
> patterns for both arguments of +, to account for commutativity and obtain
> more results.
>
> Running time is divided by 3 when applying this to the whole kernel on my
> laptop with an Intel i5-6200U CPU.
>
> Signed-off-by: Julia Lawall <julia.lawall@...6.fr>
>
> ---
>
> v2: added SOB and fixed typos in the commit message


Applied to linux-kbuild/misc.  Thanks!



-- 
Best Regards
Masahiro Yamada