From: Alan Mackenzie <acm@muc.de>
To: Paul Eggert <eggert@cs.ucla.edu>
Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
Subject: Re: CHECK_STRUCTS/dmpstruct.h mechanism is broken.
Date: Fri, 12 Apr 2019 13:37:27 +0000 [thread overview]
Message-ID: <20190412133727.GC4588@ACM> (raw)
In-Reply-To: <93b861b3-41d2-e590-d4b8-46a4bb64bfe8@cs.ucla.edu>
Hello, Paul.
On Thu, Apr 11, 2019 at 15:23:15 -0700, Paul Eggert wrote:
[ .... ]
> Moreover, Lisp file recompilation is parallelized so it's reasonably
> fast on larger platforms (the wave of the future :-), whereas
> 'configure' will remain slow.
Why? Because we're not fixing it.
There's no reason why `configure' needs to run on a single CPU core, at
least, not that I can see at the moment.
The hero will be the hacker who contributes a -j parameter to configure
in the autoconf project. Gentoo users would be grateful for ever.
As a stopgap, would it perhaps be possible to feed `configure''s tests
through GNU Parallel, somehow? I see `configure' being fed through a
sed or AWK script to make it do this. Perhaps.
> I just now timed it, and './configure' took 29 real-time seconds
> whereas 'cd lisp; make -j16 compile-always' took 38 real-time seconds;
> this was with two circa-2013 Xeon E5-2640 v2 CPUs with 8 cores each.
> So on a 32-core platform, I expect ./configure to take longer than
> byte-compiling all the Lisp files - i.e., 'configure' is ridiculously
> slow.
For the record, the slowness of `configure' irritates me, too.
--
Alan Mackenzie (Nuremberg, Germany).
next prev parent reply other threads:[~2019-04-12 13:37 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-28 20:21 CHECK_STRUCTS/dmpstruct.h mechanism is broken Alan Mackenzie
2019-02-28 20:55 ` Eli Zaretskii
2019-02-28 20:59 ` Alan Mackenzie
2019-03-01 7:31 ` Eli Zaretskii
2019-03-01 13:09 ` Alan Mackenzie
2019-03-05 2:17 ` Paul Eggert
2019-04-09 22:47 ` Paul Eggert
2019-04-10 13:12 ` Andy Moreton
2019-04-10 14:59 ` Andy Moreton
2019-04-10 17:36 ` Paul Eggert
2019-04-10 19:26 ` Andy Moreton
2019-04-10 19:43 ` Daniel Colascione
2019-04-10 16:22 ` Alan Mackenzie
2019-04-10 18:05 ` Paul Eggert
2019-04-10 19:45 ` Alan Mackenzie
2019-04-10 20:11 ` Daniel Colascione
2019-04-11 4:11 ` Paul Eggert
2019-04-15 12:36 ` Andy Moreton
2019-04-15 15:32 ` Andy Moreton
2019-04-15 15:53 ` Paul Eggert
2019-04-11 13:13 ` Stefan Monnier
2019-04-11 4:17 ` Paul Eggert
2019-04-10 18:47 ` Daniel Colascione
2019-04-10 18:58 ` Paul Eggert
2019-04-10 19:02 ` Daniel Colascione
2019-04-10 19:22 ` Eli Zaretskii
2019-04-11 9:35 ` Robert Pluim
2019-04-11 18:31 ` Paul Eggert
2019-04-11 19:15 ` Eli Zaretskii
2019-04-11 22:13 ` Daniel Colascione
2019-04-12 6:44 ` Eli Zaretskii
2019-04-11 22:23 ` Paul Eggert
2019-04-11 22:26 ` Daniel Colascione
2019-04-11 22:38 ` Paul Eggert
2019-04-12 6:39 ` Eli Zaretskii
2019-04-12 19:40 ` Paul Eggert
2019-04-13 9:36 ` Eli Zaretskii
2019-04-14 2:52 ` Paul Eggert
2019-04-12 12:21 ` Andy Moreton
2019-04-12 13:37 ` Alan Mackenzie [this message]
2019-04-12 13:55 ` Eli Zaretskii
2019-04-12 13:58 ` Noam Postavsky
2019-04-13 14:06 ` Alan Mackenzie
2019-04-13 14:46 ` About ./configure --cache-file (WAS: CHECK_STRUCTS/dmpstruct.h mechanism is broken.) Noam Postavsky
2019-04-14 2:44 ` Paul Eggert
2019-04-14 3:26 ` Daniel Colascione
2019-04-14 3:49 ` Noam Postavsky
2019-04-14 9:45 ` Alan Mackenzie
2019-04-14 14:08 ` Eli Zaretskii
2019-04-14 14:44 ` Noam Postavsky
2019-04-14 14:53 ` Eli Zaretskii
2019-04-13 8:11 ` CHECK_STRUCTS/dmpstruct.h mechanism is broken Achim Gratz
2019-04-14 2:52 ` Paul Eggert
2019-04-14 3:28 ` Daniel Colascione
2019-04-14 7:22 ` Achim Gratz
2019-04-14 23:29 ` Paul Eggert
2019-04-15 11:31 ` Alan Mackenzie
2019-04-15 14:14 ` Paul Eggert
2019-04-15 18:11 ` Richard Stallman
2019-04-16 18:10 ` Paul Eggert
2019-04-22 2:18 ` Richard Stallman
2019-04-22 4:07 ` Paul Eggert
2019-04-23 1:41 ` Richard Stallman
2019-04-23 3:48 ` Paul Eggert
2019-04-23 6:25 ` Eli Zaretskii
2019-04-23 16:28 ` Paul Eggert
2019-04-23 17:08 ` Eli Zaretskii
2019-04-23 17:19 ` Stefan Monnier
2019-04-24 2:26 ` Richard Stallman
2019-04-15 3:36 ` Richard Stallman
2019-04-15 5:30 ` Paul Eggert
2019-04-11 19:55 ` Achim Gratz
2019-04-11 22:10 ` Daniel Colascione
2019-04-11 22:47 ` Paul Eggert
2019-04-11 22:44 ` Paul Eggert
2019-04-12 17:02 ` Daniele Nicolodi
2019-04-13 8:26 ` Achim Gratz
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