From 98c1d3a5a017df3a16cd19b27e6217cbb8f8ccb4 Mon Sep 17 00:00:00 2001
From: Arnaud AMBROSELLI <arnaud.ambroselli@yahoo.fr>
Date: Wed, 27 Sep 2023 09:44:32 +0200
Subject: [PATCH] fix(dashboard): perf on merged items

---
 dashboard/src/components/DataLoader.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/dashboard/src/components/DataLoader.js b/dashboard/src/components/DataLoader.js
index b3a3b2d241..be1bfb5884 100644
--- a/dashboard/src/components/DataLoader.js
+++ b/dashboard/src/components/DataLoader.js
@@ -468,8 +468,11 @@ export function useDataLoader(options = { refreshOnMount: false }) {
 }
 
 export const mergeItems = (oldItems, newItems = []) => {
-  const newItemsIds = newItems?.map((i) => i._id) || [];
-  const oldItemsPurged = oldItems.filter((i) => !newItemsIds.includes(i._id));
+  const newItemIds = {};
+  for (const newItem of newItems) {
+    newItemIds[newItem._id] = true;
+  }
+  const oldItemsPurged = oldItems.filter((i) => !newItemIds[i._id]);
   return [...oldItemsPurged, ...newItems].filter((e) => !e.deletedAt);
 };