From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <0b309a96d05641e239202dc8a0280609@vitanuova.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] same functions everywhere
From: rog@vitanuova.com
In-Reply-To: <00f601c31547$aa81cb00$c901a8c0@cc77109e>
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Date: Thu,  8 May 2003 14:20:27 +0100
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> the plan9 setjmp/longjmps i've seen play with the PC and the SP.
> that's cheap.  that's why we the error stuff in the kernel doesn't
> hit performance.

if the plan 9 compilers were callee-save, it wouldn't
be so cheap, presumably.

i imagine that might be a source of the inefficiency on other
platforms.