perf: disable autoload-compute-prefixes & optimize var cache

- Batch more variables in Doom's autoloads files.
- Remove all the register-definition-prefixes calls generated in
  autoloads files (for both modules' and packages' autoloads). These
  don't serve much purpose, and only incur added cost growing a large
  hash table.

lisp/cli/packages.el

@@ -722,6 +722,11 @@ original state.")
            if (string-match-p prompt-re prompt)
            return (string-match-p opt-re option)))
 
+(defadvice! doom-cli--straight-no-compute-prefixes-a (fn &rest args)
+  :around #'straight--build-autoloads
+  (let (autoload-compute-prefixes)
+    (apply fn args)))
+
 (defadvice! doom-cli--straight-fallback-to-tty-prompt-a (fn prompt actions)
   "Modifies straight to prompt on the terminal when in noninteractive sessions."
   :around #'straight--popup-raw

lisp/doom-profiles.el

@@ -362,10 +362,6 @@ Defaults to the profile at `doom-profile-default'."
              (signal 'doom-autoload-error (list init-file e))))))
 
 (defun doom-profile--generate-init-vars ()
-  (setq doom-autoloads-cached-vars '(load-path
-                                     Info-directory-list
-                                     auto-mode-alist
-                                     interpreter-mode-alist))
   (let ((v (version-to-list doom-version))
         (ref (doom-call-process "git" "-C" (doom-path doom-emacs-dir) "rev-parse" "HEAD"))
         (branch (doom-call-process "git" "-C" (doom-path doom-emacs-dir) "branch" "--show-current")))

lisp/lib/autoloads.el

@@ -12,12 +12,11 @@ hoist buggy forms into autoloads.")
   "List of regexps whose matching files won't be indexed for autoloads.")
 
 (defvar doom-autoloads-cached-vars
-  '(doom-modules
-    doom-disabled-packages
-    native-comp-deferred-compilation-deny-list
-    load-path
+  '(load-path
     auto-mode-alist
     interpreter-mode-alist
+    magic-mode-alist
+    magic-fallback-mode-alist
     Info-directory-list)
   "A list of variables to be cached in `doom-autoloads-file'.")
 
@@ -145,6 +144,7 @@ hoist buggy forms into autoloads.")
          (version-control 'never)
          case-fold-search    ; reduce magic
          autoload-timestamps ; reduce noise in generated files
+         autoload-compute-prefixes
          ;; So `autoload-generate-file-autoloads' knows where to write it
          (generated-autoload-load-name (file-name-sans-extension file))
          (target-buffer (current-buffer))