emacs 启动慢答案

【问题标题】：Slow emacs startupemacs 启动慢
【发布时间】：2016-06-08 22:00:18
【问题描述】：

我的 emacs 每次启动都需要几秒钟，这比我预期的要慢。在此期间，它显示“正在联系主机：”marmalade-repo 和 melpa。

我当前的配置合理吗？有什么方法可以加快速度，同时在需要时仍然可以安装软件包？

;; init.el --- Emacs configuration

;; INSTALL PACKAGES
;; --------------------------------------

(require 'package)

(add-to-list 'package-archives '("melpa" . "http://melpa.org/packages/") t)
(add-to-list 'package-archives '("marmalade" . "https://marmalade-repo.org/packages/"))

(package-initialize)
(when (not package-archive-contents)
  (package-refresh-contents))

(defvar myPackages
  '(better-defaults
    paredit
    idle-highlight-mode
    ido-ubiquitous
    find-file-in-project
    smex
    scpaste
    ein
    elpy
    flycheck
    material-theme
    py-autopep8))
(package-refresh-contents)

(mapc #'(lambda (package)
    (unless (package-installed-p package)
      (package-install package)))
      myPackages)

;; BASIC CUSTOMIZATION
;; --------------------------------------

(setq inhibit-startup-message t) ;; hide the startup message
(load-theme 'material t) ;; load material theme
(global-linum-mode t) ;; enable line numbers globally

;; PYTHON CONFIGURATION
;; --------------------------------------

(elpy-enable)
(elpy-use-ipython)

;; use flycheck not flymake with elpy
(when (require 'flycheck nil t)
  (setq elpy-modules (delq 'elpy-module-flymake elpy-modules))
  (add-hook 'elpy-mode-hook 'flycheck-mode))

;; enable autopep8 formatting on save
(require 'py-autopep8)
(add-hook 'elpy-mode-hook 'py-autopep8-enable-on-save)

;; enable electric pair minor mode
(defun electric-pair ()
  "If at end of line, insert character pair without surrounding spaces.
    Otherwise, just insert the typed character."
  (interactive)
  (if (eolp) (let (parens-require-spaces) (insert-pair)) (self-insert-command 1)))
(add-hook 'python-mode-hook
          (lambda ()
            (define-key python-mode-map "\"" 'electric-pair)
            (define-key python-mode-map "\'" 'electric-pair)
            (define-key python-mode-map "(" 'electric-pair)
            (define-key python-mode-map "[" 'electric-pair)
            (define-key python-mode-map "{" 'electric-pair)))


;; Send line from code buffer
;; http://stackoverflow.com/questions/27777133/change-the-emacs-send-code-to-interpreter-c-c-c-r-command-in-ipython-mode/30774439#30774439
(defun my-python-line ()
(interactive)
(save-excursion
  (setq the_script_buffer (format (buffer-name)))
  (end-of-line)
  (kill-region (point) (progn (back-to-indentation) (point)))
  (if  (get-buffer  "*Python*")
  (message "")
  (run-python "ipython" nil nil))
  ;; (setq the_py_buffer (format "*Python[%s]*" (buffer-file-name)))
  (setq the_py_buffer "*Python*")
  (switch-to-buffer-other-window  the_py_buffer)
  (goto-char (buffer-end 1))
  (yank)
  (comint-send-input)
  (switch-to-buffer-other-window the_script_buffer)
  (yank))
  (end-of-line)
  (next-line)
  )
(add-hook 'python-mode-hook
    (lambda ()
  (define-key python-mode-map "\C-cn" 'my-python-line)))

【问题讨论】：

键入M-x describe-function RET package-refresh-contents RET 并有意识地决定您是否真的每次启动 Emacs 时都需要这样做。如果你需要它，好吧，那就忍受等待时间。如果您不需要它，请删除两个引用。删除第一个匹配项(when (not package-archive-contents) (package-refresh-contents)) 并删除第二个匹配项(package-refresh-contents)。而且，除非您的包裹每天都会蒸发成稀薄的空气，否则请删除以mapc 开头的package-install 内容。
@lawlist 超级。即使只是注释掉 add-to-list 实例也会加快速度。谢谢！
@Hatshepsut：如果您指的是add-to-list 调用package-archives，那么这当然会加快速度——代价是不包括那些包档案，所以可能不你想要什么。见stackoverflow.com/a/14838150/245173。

标签： emacs

【解决方案1】：

最近，从 MELPA 加载包真的很慢，我不太清楚为什么。您可以做些什么来解决这个问题（或至少确保它只发生一次）是以守护程序模式运行 Emacs，然后在您想要编辑文件时连接到它。这意味着装载成本只发生一次。就像在启动时运行emacs --daemon 一样简单。然后你通过emacsclient连接。

【讨论】：