Reduce profile sub spam

src/state/Users.js

@@ -1,4 +1,5 @@
 import { createSlice } from '@reduxjs/toolkit'
+import { ProfileCacheExpire } from '../Const';
 
 const UsersSlice = createSlice({
     name: "Users",
@@ -19,21 +20,33 @@ const UsersSlice = createSlice({
             if (!Array.isArray(keys)) {
                 keys = [keys];
             }
+            let changes = false;
+            let fromCache = false;
             let temp = new Set(state.pubKeys);
             for (let k of keys) {
+                if (!temp.has(k)) {
+                    changes = true;
                     temp.add(k);
 
                     // load from cache
                     let cache = window.localStorage.getItem(`user:${k}`);
                     if (cache) {
                         let ud = JSON.parse(cache);
+                        if (ud.loaded > new Date().getTime() - ProfileCacheExpire) {
                             state.users[ud.pubkey] = ud;
+                            fromCache = true;
                         }
                     }
+                }
+            }
+            if (changes) {
                 state.pubKeys = Array.from(temp);
+                if (fromCache) {
                     state.users = {
                         ...state.users
                     };
+                }
+            }
         },
         setUserData: (state, action) => {
             let ud = action.payload;