Re: Linux v.s. Mac OS-X Performance

From: Doug McNaught <doug(at)mcnaught(dot)org>
To: Gregory Stark <stark(at)enterprisedb(dot)com>
Cc: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, "Scott Ribe" <scott_ribe(at)killerbytes(dot)com>, "Magnus Hagander" <magnus(at)hagander(dot)net>, "Wolfgang Keller" <wolfgang(dot)keller(dot)privat(at)gmx(dot)de>, "pgsql general" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Linux v.s. Mac OS-X Performance
Date: 2007-11-28 01:54:25
Message-ID: BDE9FBD8-8DAE-40CE-A433-4D1FEDED265E@mcnaught.org
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On Nov 27, 2007, at 8:36 PM, Gregory Stark wrote:

> I think (but I'm not sure) that the kernel in OSX comes from BSD.

Kind of. Mach is still running underneath (and a lot of the app APIs
use it directly) but there is a BSD 'personality' above it which
(AIUI) is big parts of FreeBSD ported to run on Mach. So when you use
the Unix APIs you're going through that.

-Doug

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