doom: disable jit and fix slowness and stale indexing

home-manager/progs/doom.d/config.el

@@ -82,5 +82,16 @@
   (map! :map undo-fu-mode-map "C-?" #'undo-fu-only-redo))
 
 
+;; Fix SPC p p slowness
+(after! projectile
+  (setq projectile-indexing-method 'alien
+        projectile-enable-caching nil
+        projectile-project-search-path '("~/projects/"))
+  (projectile-discover-projects-in-search-path))
+
+;; Packages are already natively compiled by Nix; JIT recompilation
+;; just wastes cycles (and the eln-cache is invalidated on every rebuild anyway)
+(setq native-comp-jit-compilation nil)
+
 ;; line wrapping
 (visual-line-mode t)