From 1d3bbac1650ec1f8b32d6b625ae716567248470d Mon Sep 17 00:00:00 2001
From: martinRenou <martin.renou@gmail.com>
Date: Mon, 23 Jan 2023 13:42:33 +0100
Subject: [PATCH] Improve performance

---
 src/panelview/objecttree.tsx | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/src/panelview/objecttree.tsx b/src/panelview/objecttree.tsx
index de2b0078..f955382b 100644
--- a/src/panelview/objecttree.tsx
+++ b/src/panelview/objecttree.tsx
@@ -208,30 +208,35 @@ class ObjectTreeReact extends React.Component<IProps, IStates> {
     clients: Map<number, IJupyterCadClientState>
   ): void => {
     const localState = this.props.cpModel.jcadModel?.localState;
+
     if (!localState) {
       return;
     }
 
-    let selectedNode: string | null = null;
+    const { selectedNode } = this.state;
+
+    let newSelectedNode: string | null = null;
     if (localState.remoteUser) {
       // We are in following mode.
       // Sync selections from a remote user
       const remoteState = clients.get(localState.remoteUser);
 
       if (remoteState?.selected?.value) {
-        selectedNode = remoteState?.selected?.value;
+        newSelectedNode = remoteState?.selected?.value;
       }
     } else if (localState.selected.value) {
-      selectedNode = localState.selected.value;
+      newSelectedNode = localState.selected.value;
     }
 
-    const openNodes = [...this.state.openNodes];
+    if (selectedNode !== newSelectedNode) {
+      const openNodes = [...this.state.openNodes];
 
-    if (selectedNode && openNodes.indexOf(selectedNode) === -1) {
-      openNodes.push(selectedNode);
-    }
+      if (newSelectedNode && openNodes.indexOf(newSelectedNode) === -1) {
+        openNodes.push(newSelectedNode);
+      }
 
-    this.setState(old => ({ ...old, openNodes, selectedNode }));
+      this.setState(old => ({ ...old, openNodes, selectedNode }));
+    }
   };
 
   private _onClientSharedOptionsChanged = (