Date: Tue, 29 Jun 1999 21:36:03 -0400 From: Tim Vanderhoek <vanderh@ecf.utoronto.ca> To: Steve Price <sprice@hiwaay.net> Cc: Mikhail Teterin <mi@aldan.algebra.com>, ports@FreeBSD.ORG Subject: Re: tcl81 port takes forever to START building Message-ID: <19990629213603.A49201@mad> In-Reply-To: <Pine.OSF.4.10.9906291942080.2788-100000@fly.HiWAAY.net>; from Steve Price on Tue, Jun 29, 1999 at 07:43:04PM -0500 References: <199906291908.PAA74662@misha.cisco.com> <Pine.OSF.4.10.9906291942080.2788-100000@fly.HiWAAY.net>
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On Tue, Jun 29, 1999 at 07:43:04PM -0500, Steve Price wrote:
> This is because of all the MLINKS in the Makefile. Care to
> take a stab at making the MLINKS code in bsd.port.mk faster?
There's more to it than this.
Look,
bash-2.02# time make generate-plist
===> Generating temporary packing list
real 0m41.125s
user 0m38.757s
sys 0m1.996s
bash-2.02# USE_X_PREFIX=t time make generate-plist
===> Generating temporary packing list
4.15 real 2.18 user 1.92 sys
bash-2.02# /usr/bin/time make generate-plist
===> Generating temporary packing list
41.06 real 38.79 user 1.95 sys
There's a bug somewhere that's rearing a very ugly head. It seems to
vary from computer to computer...
Anyways, with regards to optimizing bsd.port.mk....
Satoshi has been bugging me about INDEX generation for the last week
or so... :-) Currently I have patches that changes the time required
for a "make index" done in the ports/astro directory on my computer
from 35s to under 10s.
Not all of those optimizations apply outside of INDEX generation,
however.
Improving the time required to handle MLINKS is very difficult,
without optimizing more(1) itself (although it has a lot of room for
improvement). It would actually be fairly straightforward if we (I)
had chosen different semantics for MLINKS ... require a different
MLINKS variable for each manpage section.
For anyone who really wants to try optimizing this, the trick is will
involve this little piece of code...
_MLINKS+= ${MAN${__sect:S/l/L/:S/n/N/}PREFIX} ...
You have to think of some way of putting the correct MAN[1-9LN]PREFIX
in front of each entry in MLINKS _without_ using a make .for ...
.endfor loop.
FWIW, I do have some vague ideas on how this could be possible, but I
haven't even concretely figured-out what I'm thinking, let alone done
a proof-of-concept or implementation. Not only that, but they're very
evil ideas, and yet, they have this strange attraction... :-) Hmm...
They're starting to solidify even as I finish this para... <evil grin>
Alternatively, you optimize make's handling of .for loops, and
possibly some specific parts of its handling of variable look-ups
(currently uses a simple linked-list).
--
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