improve performance

init.el

@@ -4,21 +4,54 @@
 ;; Emacs!!!
 
 ;;; Code:
-(package-initialize)
+;; Without this comment emacs25 adds (package-initialize) here
+;; (package-initialize)
 
-(when (version<= emacs-version "24")
+(let* ((minver "24.4"))
-  (error "This is made form Emacs >=24"))
+  (when (version< emacs-version minver)
+    (error "Emacs v%s or higher is required" minver)))
 
 ;;; Welcome message
 (setq-default initial-scratch-message
               (concat ";; Happy hacking, " user-login-name " - Emacs loves you!\n\n"))
 
-(defconst emacs-start-time (current-time))
+;;; Modules directory
-(add-to-list 'load-path (concat user-emacs-directory "modules"))
+(push (concat user-emacs-directory "modules") load-path)
 
 ;;; Raise garbage collection threshold after init
-(add-hook 'after-init-hook
+(defvar best-gc-cons-threshold
-	  (lambda () (setq gc-cons-threshold local/gc-cons-threshold)))
+  4000000
+  "Best default gc threshold value.  Should NOT be too big!")
+
+;; don't GC during startup to save time
+(setq gc-cons-threshold most-positive-fixnum)
+
+(setq emacs-load-start-time (current-time))
+
+;;----------------------------------------------------------------------------
+;; Which functionality to enable (use t or nil for true and false)
+;;----------------------------------------------------------------------------
+(setq *is-a-mac* (eq system-type 'darwin))
+(setq *win64* (eq system-type 'windows-nt))
+(setq *cygwin* (eq system-type 'cygwin) )
+(setq *linux* (or (eq system-type 'gnu/linux) (eq system-type 'linux)) )
+(setq *unix* (or *linux* (eq system-type 'usg-unix-v) (eq system-type 'berkeley-unix)) )
+(setq *emacs24* (>= emacs-major-version 24))
+(setq *emacs25* (>= emacs-major-version 25))
+(setq *emacs26* (>= emacs-major-version 26))
+(setq *no-memory* (cond
+                   (*is-a-mac*
+                    (< (string-to-number (nth 1 (split-string (shell-command-to-string "sysctl hw.physmem")))) 4000000000))
+                   (*linux* nil)
+                   (t nil)))
+
+;; @see https://www.reddit.com/r/emacs/comments/55ork0/is_emacs_251_noticeably_slower_than_245_on_windows/
+;; Emacs 25 does gc too frequently
+(when *emacs25*
+  ;; (setq garbage-collection-messages t) ; for debug
+  (setq best-gc-cons-threshold (* 64 1024 1024))
+  (setq gc-cons-percentage 0.5)
+(run-with-idle-timer 5 t #'garbage-collect))
 
 ;;; Custom variables
 (setq custom-file (expand-file-name "custom.el" user-emacs-directory))
@@ -28,65 +61,75 @@
 ;;; Loads settings file
 (when (file-exists-p custom-file)
   (load settings-file))
+
 ;;;------------------------------
 ;;; Features
 ;;;------------------------------
 ;;; https://stackoverflow.com/questions/2816019/in-lisp-avoid-cannot-open-load-file-when-using-require
+
+;; @see https://www.reddit.com/r/emacs/comments/3kqt6e/2_easy_little_known_steps_to_speed_up_emacs_start/
+;; Normally file-name-handler-alist is set to
+;; (("\\`/[^/]*\\'" . tramp-completion-file-name-handler)
+;; ("\\`/[^/|:][^/|]*:" . tramp-file-name-handler)
+;; ("\\`/:" . file-name-non-special))
+;; Which means on every .el and .elc file loaded during start up, it has to runs those regexps against the filename.
 (let* ((file-name-handler-alist nil))
   ;; `package-initialize' takes 35% of startup time
   ;; need check https://github.com/hlissner/doom-emacs/wiki/FAQ#how-is-dooms-startup-so-fast for solution
-  (require 'init-security nil 'noerror)
+  (require 'init-security)
-  (require 'init-elpa nil 'noerror)
+  (require 'init-elpa)
   ;; theme
-  (require 'init-theme nil 'noerror)
+  (require 'init-theme)
   ;; Utils
-  (require 'init-utils nil 'noerror)
+  (require 'init-utils)
   ;; GUI
-  (require 'init-nlinum nil 'noerror)
+  (require 'init-nlinum)
-  (require 'init-gui nil 'noerror)
+  (require 'init-gui)
-  (require 'init-editing-utils nil 'noerror)
+  (require 'init-editing-utils)
-  (require 'init-diminish nil 'noerror)
+  (require 'init-diminish)
-  (require 'init-ecb nil 'noerror)
+  (require 'init-ecb)
-  (require 'init-modeline nil 'noerror)
+  (require 'init-modeline)
-  (require 'init-indent-guides nil 'noerror)
+  (require 'init-indent-guides)
-  (require 'init-icons nil 'noerror)
+  (require 'init-icons)
-  (require 'init-neotree nil 'noerror)
+  (require 'init-neotree)
   ;; Tools
-  (require 'init-apache nil 'noerror)
+  (require 'init-apache)
-  (require 'init-company nil 'noerror)
+  (require 'init-company)
-  (require 'init-flycheck nil 'noerror)
+  (require 'init-flycheck)
-  (require 'init-helm nil 'noerror)
+  (require 'init-helm)
-  (require 'init-log4j nil 'noerror)
+  (require 'init-log4j)
-  (require 'init-whitespace nil 'noerror)
+  (require 'init-whitespace)
-  (require 'init-emmet-mode nil 'noerror)
+  (require 'init-emmet-mode)
-  (require 'init-nginx nil 'noerror)
+  (require 'init-nginx)
-  (require 'init-git nil 'noerror)
+  (require 'init-git)
   ;;(require 'init-editorconfig nil 'noerror)
   ;; Languages
-  (require 'init-ccc nil 'noerror)
+  (require 'init-ccc)
-  (require 'init-crystal nil 'noerror)
+  (require 'init-crystal)
-  (require 'init-html nil 'noerror)
+  (require 'init-html)
-  (require 'init-markdown nil 'noerror)
+  (require 'init-markdown)
-  (require 'init-php nil 'noerror)
+  (require 'init-php)
-  (require 'init-python nil 'noerror)
+  (require 'init-python)
-  (require 'init-pkgbuild nil 'noerror)
+  (require 'init-pkgbuild)
-  (require 'init-less nil 'noerror)
+  (require 'init-less)
-  (require 'init-sass nil 'noerror)
+  (require 'init-sass)
-  (require 'init-scss nil 'noerror)
+  (require 'init-scss)
-  (require 'init-yaml nil 'noerror)
+  (require 'init-yaml)
   ;; Plus
-  (require 'init-rainbow nil 'noerror)
+  (require 'init-rainbow)
-  (require 'init-web-mode nil 'noerror)
+  (require 'init-web-mode)
-  (require 'init-ready nil 'noerror)
+  (require 'init-ready)
-  (require 'init-dokuwiki nil 'noerror))
+  (require 'init-dokuwiki))
 
 ;;; Loads custom file
 (when (file-exists-p custom-file)
   (load custom-file))
 
+(setq gc-cons-threshold best-gc-cons-threshold)
+
 (when window-system
   (let ((elapsed (float-time (time-subtract (current-time)
-                                            emacs-start-time))))
+                                            emacs-load-start-time))))
     (message "[STARTUP] Loading %s ... done (%.3fs)" load-file-name elapsed)))
 
 (provide 'init)

settings.el

@@ -3,14 +3,9 @@
 
 ;;; Code:
 
-;; Make startup faster by reducing the frequency of garbage
-;; collection. The default is 800 kilobytes. Measured in bytes.
-(setq local/gc-cons-threshold (* 50 1000 1000))
-
 (setq user-full-name "Jesús E.")
 (setq user-mail-address "heckyel@hyperbola.info")
 (set-language-environment "UTF-8")
-(setq large-file-warning-threshold (* 15 1024 1024))
 (prefer-coding-system 'utf-8)
 (setq-default buffer-file-coding-system 'utf-8-auto-unix)