Re: [9fans] slow performance

[C H Forsyth <forsyth@vitanuova.com>]

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sorry anselm: i see that the original message was repeated just now.
anyway, it's still true that we went over this one during the last few days.

the short answer is: the cpu times are basically the same on
both Plan 9 and the Other System except when doing unbuffered writes (ie, print)
on Plan 9 (and that to a non-local file, not /dev/null or ramfs).
at least, i get exactly that effect on the Plan 9 and Linux systems i was timing,
given the bug-fixed source code that was the topic of discussion.

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i think you're a few messages behind on this one...

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From: "Anselm R. Garbe" <garbeam@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] slow performance
Date: Mon, 2 Apr 2007 11:31:09 +0200
Message-ID: <20070402093109.GD11896@suckless.org>

On Mon, Apr 02, 2007 at 09:14:45AM +0000, phao wrote:
> Well, i dont know if this is a plan9 question it self, but i've writen
> a program using a data structure and the program spend about 30 secs
> to finish the task. I've compiled the same program under another
> operating system, (running in the same computer) and the program
> finish the task with 3 secs.
> 
> anyone knows what can it be?

If you want a serious answer then show us the source code of
this particular program and tell us which compilers and exact OS
you have used and how you measured the performance (I guess
using time(1)?).

Also some words about the hardware in use might be interesting.

Regards,
-- 
 Anselm R. Garbe >< http://www.suckless.org/ >< GPG key: 0D73F361