Refactor comp-effective-async-max-jobs advice

We only need this magic in CLI sessions. It's better to only use half
the CPUs in interactive sessions (if the user has enabled
comp-deferred-compilation for some reason).

Fixes #5042

core/autoload/system.el

@@ -77,15 +77,16 @@
    'face '(:height 1)
    'display '(raise 0)))
 
-(defvar doom--system-cpus nil)
 ;;;###autoload
 (defun doom-system-cpus ()
   "Return the max number of processing units on this system.
 Tries to be portable. Returns 1 if cannot be determined."
-  (or doom--system-cpus
-      (setq doom--system-cpus
+  (or (get 'doom-system-cpus 'cached-value)
+      (put 'doom-system-cpus 'cached-value
            (let ((cpus
-                   (cond ((getenv "NUMBER_OF_PROCESSORS"))
+                  (cond ((eq 'windows-nt system-type)
+                         (w32-get-nproc))
+                        ((getenv "NUMBER_OF_PROCESSORS"))
                         ((executable-find "nproc")
                          (doom-call-process "nproc"))
                         ((executable-find "sysctl")

core/core-cli.el

@@ -70,6 +70,12 @@ purpose.")
 ;; Stop user configuration from interfering with package management
 (setq enable-dir-local-variables nil)
 
+;; Default to using all cores, rather than half of them, since we compile things
+;; ahead-of-time in a non-interactive session.
+(defadvice! doom--comp-use-all-cores-a (&rest _)
+  :before #'comp-effective-async-max-jobs
+  (setq comp-num-cpus (doom-system-cpus)))
+
 
 ;;
 ;;; Entry point

core/core.el

@@ -189,14 +189,7 @@ users).")
                 (concat local-dir-re ".*/evil-collection-vterm\\.el\\'")
                 (concat local-dir-re ".*/with-editor\\.el\\'")
                 ;; https://github.com/nnicandro/emacs-jupyter/issues/297
-                (concat local-dir-re ".*/jupyter-channel\\.el\\'"))))
-  ;; Default to using all cores, rather than half of them, since we compile
-  ;; things ahead-of-time in a non-interactive session.
-  (defun doom--comp-use-all-cores-a ()
-    (if (zerop native-comp-async-jobs-number)
-        (setq comp-num-cpus (doom-system-cpus))
-      native-comp-async-jobs-number))
-  (advice-add #'comp-effective-async-max-jobs :override #'doom--comp-use-all-cores-a))
+                (concat local-dir-re ".*/jupyter-channel\\.el\\'")))))
 
 
 ;;