From: Kaushal Modi <kaushal.modi@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: Re: use-package
Date: Tue, 03 May 2016 14:01:07 +0000 [thread overview]
Message-ID: <CAFyQvY0iFrcXm_cpcZHjimM8Apm_3eEYCvydW1V3G_ByNYy30g@mail.gmail.com> (raw)
In-Reply-To: <87d1p38ll6.fsf@mat.ucm.es>
>
> Thanks. Just one question, for example my emacs_keys file contains stuff
> like
>
> (defun some-funny functions ()
> )
> (global-set-key [(f1)] 'save-buffer)
> (global-set-key [(f2)] 'some-funny-function)
>
> (provide 'emacs_keys)
>
> So using
>
> - use-package is possible?
>
Yes. Assuming that your emacs_keys.el is already in the load-path (i.e. you
are able to successfully do (require 'emacs_keys), you can do instead
(use-package emacs_keys)
- and if so: would it shorten startup?
>
Most likely, not.
use-package speeds up startup times by delaying the loading the packages
that you can afford to.. for example, you do not need to load org-mode
until you are in a buffer with org-mode major mode or you call one of the
commands like org-agenda that autoloads org-mode. So if you load org-mode
using use-package and its ":defer t" or ":commands (...)" or similar
load-deferring options, you will see an improvement in the startup time.
use-package, very broadly put, is syntax sugar, a very elaborate macro, in
a good way.
To understand what it does, type the below, place cursor after the closing
parenthesis and do M-x pp-macroexpand-last-sexp.
(use-package org-mode)
Now do the same with
(use-package org-mode
:defer t)
And once again do it with
(use-package org-mode
:mode ("\\.org\\'" . org-mode))
Study the raw elisp that all of the 3 macros above expand to and understand
them. That, in conjunction with reading the documentation on
https://github.com/jwiegley/use-package will make you understand what
use-package exactly does and how it saves you startup time.
If it helps, you can also go through few of my setup-*.el files here (
https://github.com/kaushalmodi/.emacs.d/tree/master/setup-files ) and see
how I use use-package for various packages. You can ignore the :config and
:init blocks in my use-package blocks and focus only on blocks like :defer,
:mode, :commands, :bind, etc which help me speedup my emacs startup.
--
--
Kaushal Modi
next prev parent reply other threads:[~2016-05-03 14:01 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-02 17:07 use-package Uwe Brauer
2016-05-02 18:47 ` use-package Kaushal Modi
2016-05-03 10:47 ` use-package Uwe Brauer
2016-05-03 14:01 ` Kaushal Modi [this message]
2016-05-03 22:28 ` use-package Stefan Monnier
2016-05-04 3:33 ` use-package Kaushal Modi
2016-05-04 12:09 ` use-package Stefan Monnier
2016-05-04 16:22 ` use-package Phillip Lord
2016-05-04 16:44 ` use-package Drew Adams
2016-05-05 13:34 ` use-package Phillip Lord
2016-05-05 14:00 ` use-package Drew Adams
2016-05-05 15:56 ` use-package Kaushal Modi
2016-05-05 16:12 ` use-package Drew Adams
2016-05-10 9:20 ` use-package Phillip Lord
2016-05-10 9:18 ` use-package Phillip Lord
2016-05-11 11:42 ` use-package Kaushal Modi
2016-05-12 21:04 ` use-package Phillip Lord
2016-05-13 11:56 ` use-package Stefan Monnier
2016-05-14 22:27 ` use-package Phillip Lord
2016-05-15 3:22 ` use-package Stefan Monnier
2016-05-13 15:38 ` use-package Drew Adams
2016-05-16 15:16 ` use-package Phillip Lord
2016-05-16 16:49 ` use-package Drew Adams
[not found] ` <mailman.2761.1463153947.7477.help-gnu-emacs@gnu.org>
2016-05-14 7:37 ` use-package Rusi
2016-05-10 9:13 ` use-package Phillip Lord
2016-05-05 9:51 ` use-package Uwe Brauer
2016-05-05 13:38 ` use-package Phillip Lord
2016-05-03 22:21 ` use-package Stefan Monnier
2016-05-05 10:15 ` use-package Uwe Brauer
2016-05-05 23:41 ` use-package Stefan Monnier
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