On Monday 24 November 2003 05:25 pm, M. Warner Losh wrote: > In message: <[EMAIL PROTECTED]> > > Dan Nelson <[EMAIL PROTECTED]> writes: > : 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. > > Maybe you could try it with both and tell us the actual difference in > wall time?
I don't see why this surprises anyone. A dynamic shell has to be the equivalent of swapping. In situations I have been in, you can only improve on static if you have a way to leave the pieces memory resident. Kent -- Kent Stewart Richland, WA http://users.owt.com/kstewart/index.html _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[EMAIL PROTECTED]"
