* Very slow check/nativecomp build
@ 2022-02-20 16:46 Lars Ingebrigtsen
2022-02-20 17:10 ` Alan Mackenzie
0 siblings, 1 reply; 6+ messages in thread
From: Lars Ingebrigtsen @ 2022-02-20 16:46 UTC (permalink / raw)
To: emacs-devel; +Cc: Alan Mackenzie
I first noticed this yesterday, and I don't know when it started, but
I'm pretty sure the compilation speed was normal some days ago, so I've
added Alan to the CCs because of the recent sym-with-pos change that was
applied a few days ago (but it may have nothing to do with anything).
With:
./configure --with-native-compilation --enable-checking=all
a make bootstrap -j16 takes:
real 15m46.201s
user 113m21.805s
sys 7m29.174s
It used to take 5 minutes on this machine. I'm pretty sure? Is anybody
else also seeing this, or am I totally misremembering how long it takes?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Very slow check/nativecomp build
2022-02-20 16:46 Very slow check/nativecomp build Lars Ingebrigtsen
@ 2022-02-20 17:10 ` Alan Mackenzie
2022-02-20 17:35 ` Stefan Monnier
2022-02-20 18:02 ` Lars Ingebrigtsen
0 siblings, 2 replies; 6+ messages in thread
From: Alan Mackenzie @ 2022-02-20 17:10 UTC (permalink / raw)
To: Lars Ingebrigtsen; +Cc: emacs-devel
Hello, Lars.
On Sun, Feb 20, 2022 at 17:46:38 +0100, Lars Ingebrigtsen wrote:
> I first noticed this yesterday, and I don't know when it started, but
> I'm pretty sure the compilation speed was normal some days ago, so I've
> added Alan to the CCs because of the recent sym-with-pos change that was
> applied a few days ago (but it may have nothing to do with anything).
> With:
> ./configure --with-native-compilation --enable-checking=all
> a make bootstrap -j16 takes:
> real 15m46.201s
> user 113m21.805s
> sys 7m29.174s
> It used to take 5 minutes on this machine. I'm pretty sure? Is anybody
> else also seeing this, or am I totally misremembering how long it takes?
With the --enable-checking option? Are you sure you're not remembering
it with just --with-native-compilation? --enable-checking makes things
_much_ slower.
> --
> (domestic pets only, the antidote for overdose, milk.)
> bloggy blog: http://lars.ingebrigtsen.no
--
Alan Mackenzie (Nuremberg, Germany).
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Very slow check/nativecomp build
2022-02-20 17:10 ` Alan Mackenzie
@ 2022-02-20 17:35 ` Stefan Monnier
2022-02-20 18:02 ` Lars Ingebrigtsen
1 sibling, 0 replies; 6+ messages in thread
From: Stefan Monnier @ 2022-02-20 17:35 UTC (permalink / raw)
To: Alan Mackenzie; +Cc: Lars Ingebrigtsen, emacs-devel
> --enable-checking makes things _much_ slower.
FWIW this has not always been the case, and it should be considered as
a bug (we' (well, Paul, mostly) have/has fixed such problems in the
past).
It's inevitable that it makes things slower, of course, but not by a factor 3.
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Very slow check/nativecomp build
2022-02-20 17:10 ` Alan Mackenzie
2022-02-20 17:35 ` Stefan Monnier
@ 2022-02-20 18:02 ` Lars Ingebrigtsen
2022-02-20 18:10 ` Eli Zaretskii
1 sibling, 1 reply; 6+ messages in thread
From: Lars Ingebrigtsen @ 2022-02-20 18:02 UTC (permalink / raw)
To: Alan Mackenzie; +Cc: emacs-devel
Alan Mackenzie <acm@muc.de> writes:
> With the --enable-checking option? Are you sure you're not remembering
> it with just --with-native-compilation? --enable-checking makes things
> _much_ slower.
Yes, I must be misremembering. nativecomp without checking still takes
about five minutes, and I checked with a nativecomp build from a couple
months back -- it also takes about 14 minutes with nativecomp +
checking.
So I guess it's been a long while since I tried a build that had both
nativecomp and checking.
Sorry for the noise.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Very slow check/nativecomp build
2022-02-20 18:02 ` Lars Ingebrigtsen
@ 2022-02-20 18:10 ` Eli Zaretskii
2022-02-20 18:35 ` Lars Ingebrigtsen
0 siblings, 1 reply; 6+ messages in thread
From: Eli Zaretskii @ 2022-02-20 18:10 UTC (permalink / raw)
To: Lars Ingebrigtsen; +Cc: acm, emacs-devel
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Sun, 20 Feb 2022 19:02:58 +0100
> Cc: emacs-devel@gnu.org
>
> Alan Mackenzie <acm@muc.de> writes:
>
> > With the --enable-checking option? Are you sure you're not remembering
> > it with just --with-native-compilation? --enable-checking makes things
> > _much_ slower.
>
> Yes, I must be misremembering. nativecomp without checking still takes
> about five minutes, and I checked with a nativecomp build from a couple
> months back -- it also takes about 14 minutes with nativecomp +
> checking.
As Stefan points out, this shouldn't happen. So we should try and
find the reason for such slowdown from using --enable-checking.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Very slow check/nativecomp build
2022-02-20 18:10 ` Eli Zaretskii
@ 2022-02-20 18:35 ` Lars Ingebrigtsen
0 siblings, 0 replies; 6+ messages in thread
From: Lars Ingebrigtsen @ 2022-02-20 18:35 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: acm, emacs-devel
Eli Zaretskii <eliz@gnu.org> writes:
> As Stefan points out, this shouldn't happen. So we should try and
> find the reason for such slowdown from using --enable-checking.
I wondered whether the 3x increase with --enable-checking=all was a
nativecomp phenomenon, but it seems to be the same without nativecomp.
It takes 2:30 to built the trunk with just ./configure, and about 8
minutes with checking.
I tried the same in emacs-28, and it's much the same story there:
Without checking, it's 2:20, and with checking it's 6:50. So it's not a
new phenomenon that checking adds a multiplier to the build time, but it
seems to be worsening somewhat.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread
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-- links below jump to the message on this page --
2022-02-20 16:46 Very slow check/nativecomp build Lars Ingebrigtsen
2022-02-20 17:10 ` Alan Mackenzie
2022-02-20 17:35 ` Stefan Monnier
2022-02-20 18:02 ` Lars Ingebrigtsen
2022-02-20 18:10 ` Eli Zaretskii
2022-02-20 18:35 ` Lars Ingebrigtsen
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