Run emacs garbage collection when idle.

This is to hopefully avoid running garbage collection while I am actively interacting with emacs, which should theoretically result in a smoother experience.

ansible/roles/emacs/files/elisp/base.el

@@ -36,6 +36,8 @@
  ;; Don't pop up a small window at the bottom of emacs at launch.
  inhibit-startup-screen t
  inhibit-startup-message t
+ ;; Don't show the list of buffers when opening many files.
+ inhibit-startup-buffer-menu t
  ;; Give the scratch buffer a clean slate.
  initial-major-mode 'fundamental-mode
  initial-scratch-message nil
@@ -81,4 +83,12 @@
 (setopt auto-revert-check-vc-info t)
 (global-auto-revert-mode)
 
+;;;;; Performance
+;; Run garbage collect when emacs is idle
+(run-with-idle-timer 5 t (lambda () (garbage-collect)))
+(add-function :after after-focus-change-function
+              (lambda ()
+                (unless (frame-focus-state)
+                  (garbage-collect))))
+
 (provide 'base)