fix: disable non-essential startup optimizations in debug-mode
As to not interfere with debugging.
This commit is contained in:
Henrik Lissner
parent
7aa87eb019
commit
6eab48641f
1 changed files with 71 additions and 70 deletions
141
lisp/doom.el
141
lisp/doom.el
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@ -390,81 +390,82 @@ users).")
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(doom-partial #'tty-run-terminal-initialization
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(selected-frame) nil t))))
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;; PERF,UX: Site files tend to use `load-file', which emits "Loading X..."
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;; messages in the echo area. Writing to the echo-area triggers a
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;; redisplay, which can be expensive during startup. This may also cause
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;; an flash of white when creating the first frame.
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(define-advice load-file (:override (file) silence)
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(load file nil 'nomessage))
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;; COMPAT: But undo our `load-file' advice later, as to limit the scope of
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;; any edge cases it could induce.
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(define-advice startup--load-user-init-file (:before (&rest _) undo-silence)
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(advice-remove #'load-file #'load-file@silence))
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(unless init-file-debug
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;; PERF,UX: Site files tend to use `load-file', which emits "Loading X..."
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;; messages in the echo area. Writing to the echo-area triggers a
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;; redisplay, which can be expensive during startup. This may also cause
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;; an flash of white when creating the first frame.
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(define-advice load-file (:override (file) silence)
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(load file nil 'nomessage))
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;; COMPAT: But undo our `load-file' advice later, as to limit the scope of
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;; any edge cases it could induce.
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(define-advice startup--load-user-init-file (:before (&rest _) undo-silence)
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(advice-remove #'load-file #'load-file@silence))
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;; PERF: `load-suffixes' and `load-file-rep-suffixes' are consulted on each
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;; `require' and `load'. Doom won't load any dmodules this early, so omit
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;; .so for a small startup boost. This is later restored in doom-start.
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(put 'load-suffixes 'initial-value (default-toplevel-value 'load-suffixes))
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(put 'load-file-rep-suffixes 'initial-value (default-toplevel-value 'load-file-rep-suffixes))
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(set-default-toplevel-value 'load-suffixes '(".elc" ".el"))
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(set-default-toplevel-value 'load-file-rep-suffixes '(""))
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;; COMPAT: Undo any problematic startup optimizations; from this point, I make
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;; no assumptions about what might be loaded in userland.
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(add-hook! 'doom-before-init-hook
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(defun doom--reset-load-suffixes-h ()
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(setq load-suffixes (get 'load-suffixes 'initial-value)
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load-file-rep-suffixes (get 'load-file-rep-suffixes 'initial-value))))
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;; PERF: `load-suffixes' and `load-file-rep-suffixes' are consulted on each
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;; `require' and `load'. Doom won't load any dmodules this early, so omit
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;; .so for a small startup boost. This is later restored in doom-start.
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(put 'load-suffixes 'initial-value (default-toplevel-value 'load-suffixes))
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(put 'load-file-rep-suffixes 'initial-value (default-toplevel-value 'load-file-rep-suffixes))
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(set-default-toplevel-value 'load-suffixes '(".elc" ".el"))
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(set-default-toplevel-value 'load-file-rep-suffixes '(""))
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;; COMPAT: Undo any problematic startup optimizations; from this point, I make
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;; no assumptions about what might be loaded in userland.
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(add-hook! 'doom-before-init-hook
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(defun doom--reset-load-suffixes-h ()
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(setq load-suffixes (get 'load-suffixes 'initial-value)
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load-file-rep-suffixes (get 'load-file-rep-suffixes 'initial-value))))
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;; PERF: Doom uses `defcustom' to indicate variables that users are expected
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;; to reconfigure. Trouble is it fires off initializers meant to
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;; accommodate any user attempts to configure them before they were
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;; defined. This is unnecessary before $DOOMDIR/init.el is loaded, so I
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;; disable them until it is.
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(setq custom-dont-initialize t)
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(add-hook! 'doom-before-init-hook
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(defun doom--reset-custom-dont-initialize-h ()
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(setq custom-dont-initialize nil)))
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;; PERF: Doom uses `defcustom' to indicate variables that users are expected
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;; to reconfigure. Trouble is it fires off initializers meant to
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;; accommodate any user attempts to configure them before they were
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;; defined. This is unnecessary before $DOOMDIR/init.el is loaded, so I
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;; disable them until it is.
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(setq custom-dont-initialize t)
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(add-hook! 'doom-before-init-hook
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(defun doom--reset-custom-dont-initialize-h ()
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(setq custom-dont-initialize nil)))
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;; PERF: The mode-line procs a couple dozen times during startup. This is
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;; normally quite fast, but disabling the default mode-line and reducing the
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;; update delay timer seems to stave off ~30-50ms.
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(put 'mode-line-format 'initial-value (default-toplevel-value 'mode-line-format))
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(setq-default mode-line-format nil)
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(dolist (buf (buffer-list))
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(with-current-buffer buf (setq mode-line-format nil)))
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;; PERF,UX: Premature redisplays can substantially affect startup times and
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;; produce ugly flashes of unstyled Emacs.
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(setq-default inhibit-redisplay t
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inhibit-message t)
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;; COMPAT: Then reset it with advice, because `startup--load-user-init-file'
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;; will never be interrupted by errors. And if these settings are left
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;; set, Emacs could appear frozen or garbled.
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(defun doom--reset-inhibited-vars-h ()
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(setq-default inhibit-redisplay nil
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;; Inhibiting `message' only prevents redraws and
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inhibit-message nil)
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(redraw-frame))
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(add-hook 'after-init-hook #'doom--reset-inhibited-vars-h)
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(define-advice startup--load-user-init-file (:after (&rest _) undo-inhibit-vars)
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(when init-file-had-error
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(doom--reset-inhibited-vars-h))
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(unless (default-toplevel-value 'mode-line-format)
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(setq-default mode-line-format (get 'mode-line-format 'initial-value))))
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;; PERF: The mode-line procs a couple dozen times during startup. This is
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;; normally quite fast, but disabling the default mode-line and reducing the
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;; update delay timer seems to stave off ~30-50ms.
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(put 'mode-line-format 'initial-value (default-toplevel-value 'mode-line-format))
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(setq-default mode-line-format nil)
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(dolist (buf (buffer-list))
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(with-current-buffer buf (setq mode-line-format nil)))
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;; PERF,UX: Premature redisplays can substantially affect startup times and
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;; produce ugly flashes of unstyled Emacs.
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(setq-default inhibit-redisplay t
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inhibit-message t)
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;; COMPAT: Then reset it with advice, because `startup--load-user-init-file'
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;; will never be interrupted by errors. And if these settings are left
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;; set, Emacs could appear frozen or garbled.
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(defun doom--reset-inhibited-vars-h ()
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(setq-default inhibit-redisplay nil
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;; Inhibiting `message' only prevents redraws and
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inhibit-message nil)
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(redraw-frame))
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(add-hook 'after-init-hook #'doom--reset-inhibited-vars-h)
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(define-advice startup--load-user-init-file (:after (&rest _) undo-inhibit-vars)
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(when init-file-had-error
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(doom--reset-inhibited-vars-h))
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(unless (default-toplevel-value 'mode-line-format)
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(setq-default mode-line-format (get 'mode-line-format 'initial-value))))
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;; PERF: Doom disables the UI elements by default, so that there's less for
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;; the frame to initialize. However, the toolbar is still populated
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;; regardless, so I lazy load it until tool-bar-mode is actually used.
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(advice-add #'tool-bar-setup :override #'ignore)
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(define-advice startup--load-user-init-file (:before (&rest _) defer-tool-bar-setup)
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(advice-remove #'tool-bar-setup #'ignore)
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(add-transient-hook! 'tool-bar-mode (tool-bar-setup)))
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;; PERF: Doom disables the UI elements by default, so that there's less for
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;; the frame to initialize. However, the toolbar is still populated
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;; regardless, so I lazy load it until tool-bar-mode is actually used.
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(advice-add #'tool-bar-setup :override #'ignore)
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(define-advice startup--load-user-init-file (:before (&rest _) defer-tool-bar-setup)
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(advice-remove #'tool-bar-setup #'ignore)
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(add-transient-hook! 'tool-bar-mode (tool-bar-setup)))
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;; PERF: Unset a non-trivial list of command line options that aren't
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;; relevant to our current OS, but `command-line-1' still processes.
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(unless IS-MAC
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(setq command-line-ns-option-alist nil))
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(unless (memq initial-window-system '(x pgtk))
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(setq command-line-x-option-alist nil))))
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;; PERF: Unset a non-trivial list of command line options that aren't
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;; relevant to our current OS, but `command-line-1' still processes.
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(unless IS-MAC
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(setq command-line-ns-option-alist nil))
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(unless (memq initial-window-system '(x pgtk))
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(setq command-line-x-option-alist nil)))))
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;;
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