linux-kernel - Re: [PATCH] kunit: tool: simplify kconfig is_subset

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Date:   Wed, 9 Dec 2020 15:28:48 +0800
From:   David Gow <davidgow@...gle.com>
To:     Daniel Latypov <dlatypov@...gle.com>
Cc:     Brendan Higgins <brendanhiggins@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] kunit: tool: simplify kconfig is_subset_of() logic

On Wed, Dec 9, 2020 at 7:21 AM Daniel Latypov <dlatypov@...gle.com> wrote:
>
> Don't use an O(nm) algorithm* and make it more readable by using a dict.
>
> *Most obviously, it does a nested for-loop over the entire other config.
> A bit more subtle, it calls .entries(), which constructs a set from the
> list for _every_ outer iteration.
>
> Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
> ---
Thanks! This works great here: I didn't time it to see how much faster
it is, but it's clearly an improvement.

Reviewed-by: David Gow <davidgow@...gle.com>

Cheers,
-- David