From owner-freebsd-current@FreeBSD.ORG  Wed Dec 10 12:23:13 2003
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Date: Wed, 10 Dec 2003 12:23:13 -0800
From: Kris Kennaway <kris@FreeBSD.org>
To: Mathew Kanner <mat@cnd.mcgill.ca>
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Subject: Re: Why are sound ioctl calls so slow?
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On Tue, Dec 09, 2003 at 02:25:57PM -0500, Mathew Kanner wrote:

> 	My first guess would be the device is rebuilding feeder/mixer
> chains every time mpg123 changes format.  I would run the test one
> more time, disabling vchans and rate conversion.

FWIW, I see this too, without vchans enabled - this problem has
existed for a long time (over a year).  In fact it was the catalyst
for me to stop using mpg123 (in favour of madplay, which seems to be
generally better anyway).

Kris