Received: by taz.hyperreal.com (8.6.12/8.6.5) id KAA06563;
 Fri, 26 Apr 1996 10:15:45 -0700
Received: from ooo.lanl.gov by taz.hyperreal.com (8.6.12/8.6.5) with ESMTP id
 KAA06548; Fri, 26 Apr 1996 10:15:42 -0700
Received: by ooo.lanl.gov
	(1.37.109.16/16.2) id AA106048930; Fri, 26 Apr 1996 11:15:30 -0600
From: Rob Hartill <hartill@ooo.lanl.gov>
Message-Id: <199604261715.AA106048930@ooo.lanl.gov>
Subject: Re: ScriptAlias-like extensions for perl etc 
To: new-httpd@hyperreal.com
Date: Fri, 26 Apr 96 11:15:30 MDT
In-Reply-To: <199604261708.MAA15657@austin.bsdi.com>;
 from "Tony Sanders" at Apr 26, 96 12:08 (noon)
X-Organization: Theoretical Division, T-8. Los Alamos National Laboratory
X-Snail: LANL Theoretical Divi' T-8, MS B285, P.O Box 1663,
 Los Alamos NM 87545
X-Marks-The-Spot: Doh !
X-Url: http://nqcd.lanl.gov/~hartill/
X-Cessive-Use-Of-Headers: check
Mailer: Elm [revision: 70.85]
Sender: owner-new-httpd@apache.org
Precedence: bulk
Reply-To: new-httpd@hyperreal.com

 
> Rob Hartill writes:
> > All my CGI is written in perl. As an experiment I changed
> > mod_cgi.c to call the perl binary directly instead of leaving
> > it to sh (I think that's what gets called to determine that perl
> > needs to be called because of the "#!" first line.)

> That's a negative.  exec() [in the kernel that is] looks at the
> file for the magic number ``#!'' and if present parses the line
> for the binary to actually exec.  This is true on all Unix systems.

Hmm. Intersting. I must be confusing it with perl's exec, but the "problem"
has been mentioned before and someone hacked a similar "solution".

> You would need to do some profiling to find out what was going on
> but your change would not affect real performance in any measureable way.

The speedup was small, but it was there over a number of tests, which
alternated between my hack switched on and off.