From 15015dacd7f0f36f7cc1514d9c58ab553fa5ed09 Mon Sep 17 00:00:00 2001
From: infinite-persistence <inf.persistence@gmail.com>
Date: Thu, 27 May 2021 20:48:55 +0800
Subject: [PATCH] Performance: don't spread in 'reduce'

---
 ui/redux/reducers/tags.js | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/ui/redux/reducers/tags.js b/ui/redux/reducers/tags.js
index 0001a3f8c..646ecac1a 100644
--- a/ui/redux/reducers/tags.js
+++ b/ui/redux/reducers/tags.js
@@ -4,13 +4,10 @@ import { ACTIONS as LBRY_REDUX_ACTIONS, DEFAULT_KNOWN_TAGS, DEFAULT_FOLLOWED_TAG
 import { handleActions } from 'util/redux-utils';
 
 function getDefaultKnownTags() {
-  return DEFAULT_FOLLOWED_TAGS.concat(DEFAULT_KNOWN_TAGS).reduce(
-    (tagsMap, tag) => ({
-      ...tagsMap,
-      [tag]: { name: tag },
-    }),
-    {}
-  );
+  return DEFAULT_FOLLOWED_TAGS.concat(DEFAULT_KNOWN_TAGS).reduce((tagsMap, tag) => {
+    tagsMap[tag] = { name: tag };
+    return tagsMap;
+  }, {});
 }
 
 const defaultState: TagState = {
@@ -27,7 +24,7 @@ export default handleActions(
       let newFollowedTags = followedTags.slice();
 
       if (newFollowedTags.includes(name)) {
-        newFollowedTags = newFollowedTags.filter(tag => tag !== name);
+        newFollowedTags = newFollowedTags.filter((tag) => tag !== name);
       } else {
         newFollowedTags.push(name);
       }
@@ -57,7 +54,7 @@ export default handleActions(
 
       let newKnownTags = { ...knownTags };
       delete newKnownTags[name];
-      const newFollowedTags = followedTags.filter(tag => tag !== name);
+      const newFollowedTags = followedTags.filter((tag) => tag !== name);
 
       return {
         ...state,