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Date:      Tue, 12 May 2020 13:32:10 +0100
From:      Steve O'Hara-Smith <steve@sohara.org>
To:        Nikita Stepanov <nikitastepanov113@yandex.kz>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Recompiling the kernel increases performance?
Message-ID:  <20200512133210.3e5ed9aac65903ebdee3ea56@sohara.org>
In-Reply-To: <825101589284883@sas1-ffdbcd5f1d77.qloud-c.yandex.net>
References:  <825101589284883@sas1-ffdbcd5f1d77.qloud-c.yandex.net>

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On Tue, 12 May 2020 18:01:23 +0600
Nikita Stepanov <nikitastepanov113@yandex.kz> wrote:

	Recompiling the kernel may improve the performance of some CPU
bound operations if you adjust optimisation flags and compile to a specific
CPU architecture. However unless your system load is such that it is CPU
bound in kernel space it is unlikely to make a difference to the overall
performance of the system at the cost of increasing the risk of hitting
optimisation bugs.

	Very high performance routing is one of the few applications I can
think of where I might expect a noticeable difference from optimising
kernel code.

-- 
Steve O'Hara-Smith <steve@sohara.org>



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