Re: 40% slowdown with dynamic /bin/sh

From: Dan Nelson <dnelson_at_allantgroup.com>
Date: Mon, 24 Nov 2003 19:22:08 -0600
In the last episode (Nov 25), Daniel O'Connor said:
> On Tuesday 25 November 2003 06:45, Andrew Gallatin wrote:
> > So.. forking a dynamic sh is roughly 40% more expensive than
> > forking a static copy of sh.  This is embarrassing.
> >
> > I propose that we at least make /bin/sh static.  (and not add a
> > /sbin/sh; if we must have a dynamic sh, import pdksh, or put a
> > dynamically linked sh in /usr/bin/sh).
> >
> > I'd greatly prefer that the the dynamic root default be backed out
> > until a substantial amount of this performance can be recovered.
> 
> What _REAL WORLD_ task does this slow down?

Try timing "cd /usr/ports/www/mozilla-devel ; make clean" with static
and dynamic /bin.  bsd.port.mk spawns many many many /bin/sh processes.
 
-- 
	Dan Nelson
	dnelson_at_allantgroup.com
Received on Mon Nov 24 2003 - 16:22:15 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:37:30 UTC