5da3641aad
Our first step toward dropping 26.x support. Allows our optimizations to reach a little further into the startup.
43 lines
2.2 KiB
EmacsLisp
43 lines
2.2 KiB
EmacsLisp
;;; early-init.el -*- lexical-binding: t; -*-
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;; Emacs 27.1 introduced early-init.el, which is run before init.el, before
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;; package and UI initialization happens, and before site files are loaded.
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;; A big contributor to startup times is garbage collection. We up the gc
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;; threshold to temporarily prevent it from running, then reset it later by
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;; enabling `gcmh-mode'. Not resetting it will cause stuttering/freezes.
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(setq gc-cons-threshold most-positive-fixnum)
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;; In noninteractive sessions, prioritize non-byte-compiled source files to
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;; prevent the use of stale byte-code. Otherwise, it saves us a little IO time
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;; to skip the mtime checks on every *.elc file.
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(setq load-prefer-newer noninteractive)
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;; In Emacs 27+, package initialization occurs before `user-init-file' is
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;; loaded, but after `early-init-file'. Doom handles package initialization, so
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;; we must prevent Emacs from doing it early!
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(setq package-enable-at-startup nil)
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(fset #'package--ensure-init-file #'ignore) ; DEPRECATED Removed in 28
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;; `file-name-handler-alist' is consulted on every `require', `load' and various
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;; path/io functions. You get a minor speed up by nooping this. However, this
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;; may cause problems on builds of Emacs where its site lisp files aren't
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;; byte-compiled and we're forced to load the *.el.gz files (e.g. on Alpine)
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(unless (daemonp)
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(defvar doom--initial-file-name-handler-alist file-name-handler-alist)
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(setq file-name-handler-alist nil)
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;; Restore `file-name-handler-alist' later, because it is needed for handling
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;; encrypted or compressed files, among other things.
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(defun doom-reset-file-handler-alist-h ()
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;; Re-add rather than `setq', because changes to `file-name-handler-alist'
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;; since startup ought to be preserved.
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(dolist (handler file-name-handler-alist)
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(add-to-list 'doom--initial-file-name-handler-alist handler))
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(setq file-name-handler-alist doom--initial-file-name-handler-alist))
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(add-hook 'emacs-startup-hook #'doom-reset-file-handler-alist-h))
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;; Ensure Doom is running out of this file's directory
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(setq user-emacs-directory (file-name-directory load-file-name))
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;; Load the heart of Doom Emacs
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(load (concat user-emacs-directory "core/core") nil 'nomessage)
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