From: Junio C Hamano <gitster@pobox.com>
Date: Thu, 30 Mar 2023 22:16:21 GMT
Subject: Re: [PATCH 0/4] some chainlint fixes and performance improvements
Message-ID: <xmqqcz4pj362.fsf@gitster.g>
In-Reply-To: <20230330220823.GA130426@coredump.intra.peff.net>

Jeff King <peff@peff.net> writes:

> When the output is going to the terminal, then the terminal is consuming
> CPU, and the frequency scales up. So it's faster when we show the
> output, even though we're doing more work, because the CPU clock is
> faster.

That's disgustingly sick and crazy ;-).  But it does explain the symptom
and it sounds like that "powersave" is a poor match for measurement.

> Switching to the "performance" governor makes the problem go
> away.
> ...
> So no effect on the series (good), but I didn't want to leave the
> mystery unsolved on the list. :)

Thanks.