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bug#30731: Slower startup using March (27.0.50) build in windows

From: Shuguang Sun
Subject: bug#30731: Slower startup using March (27.0.50) build in windows
Date: Mon, 12 Mar 2018 01:21:50 +0800

Hi Noam,

I read the disussions and patches, and I find out the 3.692 sec at the beigining seems package initialization (according to the patch in Feb 17).
However, I still don't get
1. What is an early init file?
2. Why custom-set-variable  get slower?
3. If i want to disable package initialization prior to any thin in the .emacs, but after custom-set-variable and some environment variables setting (e.g. PATH, exec-path), how to do it?

Could you help provide an example using my situation?
1) I use a Windows 7 box, and have HOME env variables, and .emacs.d folder under it
2) I have a site-start.el for environment variables setting (e.g. PATH, exec-path)  <= I thinks this it not critical because it has no speed effect after I delete the site-start.el
3) I have .emacs under HOME, and compile it to .emacs.elc to speed it up
4) I load dired.el and then custom-set-variable, then some frame settings , then initialize package using
(setq package-enable-at-startup nil)
and then packages customizations (hooks etc)
5) I don't have default.el or init.el
How could I adapt the change in package.el and startup.el? e.g. to disable package initialization at the very begining but start it at some point of the initialization of emacs.

On Sun, Mar 11, 2018 at 11:25 AM, Shuguang Sun <address@hidden> wrote:
I patched the startup.el and package.el in the installed emacs. They seems not work. I'll try to patch the git source prior to the complilation later when I get time.

1. Even I put the (setq package-enable-at-startup nil) in the top of the .emacs, it takes 3.692 sec before loading others of the init file. I have a site-start.el file, which is suposed to run before .emacs is loaded. Woud it impact the the load process? NB. the 3.692 does not count the site-start in. It is from
(message ">>> start load .emacs: %.3f sec <<<"
                     (float-time (time-subtract after-init-time before-init-time)))

2. No mather whether I set package-enable-at-startup, it takes about 8 sec to load the custom-set-variable. However, it takes only 2.5 sec in the Feb version.

Symbol's value as variable is void: Info-default-directory-list [14 times]
>>> start load .emacs: 3.692 sec <<<
Loading Sun Shuguang’s .emacs file
>>> before custom-set-variables : 4.176 sec <<<
Loading image-file...done
Loading time...done
Loading completion...done
Loading elec-pair...done
Loading icomplete...done
Loading ido...done
Loading avoid...done
Loading savehist...done
Loading paren...done
>>> custom-set-variables time: 12.387 sec <<<

On Fri, Mar 9, 2018 at 9:35 AM, Noam Postavsky <address@hidden> wrote:
Shuguang Sun <address@hidden> writes:

> I built emacs 27 on 4th March, however, the startup gets slower than
> the build on 4th Feb (which is camparable with the build in https://
> alpha.gnu.org/gnu/emacs/pretest/windows/emacs-27/).
> I'm sorry I don't know how to repeat it using "-q".
> System: Windows 7

> Below is the message from 4th March build.
> 1. It has a warning at the very begining. If start with -q, there
> will be no such warning.
> 2. Actually there is nothing before " >>> start load .emacs: 2.575
> sec <<< ", however, it still takes 2.574 sec.
> 3. The load time is longer than the 4th Feb build.
> Symbol's value as variable is void: Info-default-directory-list [14
> times]

Could you try out the patch posted to emacs-devel?


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