From 6c01d1a5acda57ca4ca5a96db9e3a002d9d96bf6 Mon Sep 17 00:00:00 2001
From: Henrik Lissner <henrik@lissner.net>
Date: Mon, 11 May 2020 00:16:17 -0400
Subject: [PATCH] Increase read-process-output-max for robe-mode

It appears robe, like LSP, is very chatty, which can slow down Emacs.
---
 modules/lang/ruby/config.el | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/lang/ruby/config.el b/modules/lang/ruby/config.el
index 125891497..ebd431c7f 100644
--- a/modules/lang/ruby/config.el
+++ b/modules/lang/ruby/config.el
@@ -50,6 +50,11 @@
   (set-lookup-handlers! 'ruby-mode
     :definition #'robe-jump
     :documentation #'robe-doc)
+  (when (boundp 'read-process-output-max)
+    ;; Robe can over saturate IPC, making interacting with it slow/clobbering
+    ;; the GC, so increase the amount of data Emacs reads from it at a time.
+    (setq-hook! '(robe-mode-hook inf-ruby-mode-hook)
+      read-process-output-max (* 1024 1024)))
   (when (featurep! :editor evil)
     (add-hook 'robe-mode-hook #'evil-normalize-keymaps))
   (map! :localleader