Message-Id: <200404191245.i3JCjqal006292@localhost.localdomain>
Reply-To: <stl@nuwen.net>
From: "Stephan T. Lavavej" <stl@nuwen.net>
To: <linux-kernel@vger.kernel.org>
Subject: RE: Process Creation Speed
Date: Mon, 19 Apr 2004 05:44:12 -0700
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Thanks to all who have responded.

I had been measuring the time to create and terminate a do-nothing program.
I had not been measuring CGI programs, though that was why I was doing the
measurement in the first place.

I changed my measurement strategy, and I now get about 110 microseconds for
creation and termination of a do-nothing process (fork() followed by
execve()).  Statically linking everything gave a significant speedup, which
allowed me to reach that value.  This was on a 2.6.x kernel.  110
microseconds is well within my "doesn't suck" range, so I'm happy - CGI will
be fast enough for my needs, and I can always turn to FastCGI later if
necessary.

I am writing a web-based forum entirely in C++, rejecting interpreted
languages (Perl, PHP, ASP, etc.) and relational databases (MySQL,
PostGreSQL, etc.) entirely.  My forum consists of "kiddy" CGI processes
which talk over the network to a persistent "mommy" daemon who keeps all
forum state in main memory.

My code runs on both Windows and GNU/Linux with no configuration needed, but
separate measurements indicate that XP takes about 3.3 ms to create and
terminate a do-nothing process.  Thus it looks like Linux 2.6.x will be the
kernel of choice for my forum.

Thanks again!

Stephan T. Lavavej
http://nuwen.net


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