From f71a775bd11cc4e5bbaf77c91ec44c26cc9de43d Mon Sep 17 00:00:00 2001
From: Rachel Fenichel <fenichel@google.com>
Date: Mon, 20 Apr 2020 19:09:44 -0700
Subject: [PATCH] Don't watch node_modules

Reduce CPU and memory usage.

Context: https://webpack.js.org/configuration/watch/#watchoptionsignored

More context: the reason live reloading was failing for me was not enough watchers: https://webpack.js.org/configuration/watch/#not-enough-watchers

I fixed it by increasing my max watchers, but while digging found that we were watching node_modules and don't need to.
---
 plugins/dev-scripts/config/webpack.config.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/plugins/dev-scripts/config/webpack.config.js b/plugins/dev-scripts/config/webpack.config.js
index 08b3a2e23c..cd980b29be 100644
--- a/plugins/dev-scripts/config/webpack.config.js
+++ b/plugins/dev-scripts/config/webpack.config.js
@@ -18,6 +18,9 @@ module.exports = (env) => {
   const devServer = {
     port: 3000,
     host: '0.0.0.0',
+    watchOptions: {
+      ignored: /node_modules/,
+    },
   };
   if (env.buildTest) {
     devServer.openPage = 'test';