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From: Alan Mackenzie <acm@muc.de>
To: Noam Postavsky <npostavs@gmail.com>
Cc: Eli Zaretskii <eliz@gnu.org>, Paul Eggert <eggert@cs.ucla.edu>,
	Emacs developers <emacs-devel@gnu.org>
Subject: Re: CHECK_STRUCTS/dmpstruct.h mechanism is broken.
Date: Sat, 13 Apr 2019 14:06:46 +0000	[thread overview]
Message-ID: <20190413140646.GE13636@ACM> (raw)
In-Reply-To: <CAM-tV--Z4fec7Fc0eSmq+a-OqiiH+v9BSVfXSfG45BKSiCEf9w@mail.gmail.com>

Hello, Noam.

On Fri, Apr 12, 2019 at 09:58:17 -0400, Noam Postavsky wrote:
> On Fri, 12 Apr 2019 at 09:37, Alan Mackenzie <acm@muc.de> wrote:

> > > 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.

> For the record, I use the --cache-file option, and `configure' runs in
> 2 real-time seconds. I use separate cache files per configuration, it
> works pretty well.

I tried that out yesterday, and indeed it takes about 2 seconds.  :-)

But it's not clear how ./configure -C works.  What gets cached, and how
does configure know when something needs determining again rather than
just copying a result from the cache?  Presumably one needs to be
prepared to delete the cache file when moving the top level directory to
a different environment, and things like that.

Is ./configure -C documented at all?

-- 
Alan Mackenzie (Nuremberg, Germany).



  reply	other threads:[~2019-04-13 14:06 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
2019-04-12 13:55                       ` Eli Zaretskii
2019-04-12 13:58                       ` Noam Postavsky
2019-04-13 14:06                         ` Alan Mackenzie [this message]
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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