From cbc39659fdf56fff40e1b00d33dca69348105b27 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Wed, 8 Apr 2026 03:45:32 +0000
Subject: [PATCH] Refactor array selections using map to batch UI updates.

Modifying individual properties on structs stored within a @Published array inside a loop triggers the objectWillChange notification on every single iteration. By instead mapping the array and reassigning it, the UI only triggers an update once per method.

Co-authored-by: acebytes <2820910+acebytes@users.noreply.github.com>
---
 .jules/bolt.md                                |  3 ++
 .../ViewModels/CacheoutViewModel.swift        | 34 ++++++++++++++-----
 2 files changed, 29 insertions(+), 8 deletions(-)
 create mode 100644 .jules/bolt.md

diff --git a/.jules/bolt.md b/.jules/bolt.md
new file mode 100644
index 0000000..376673d
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2024-04-08 - Batch UI updates in ObservableObject
+**Learning:** Mutating individual elements of a `@Published` array property (containing structs) inside a loop triggers a UI update notification for every change, causing unnecessary re-renders.
+**Action:** Use functional methods like `map` to batch updates into a single array reassignment, significantly reducing UI recalculations.
diff --git a/Sources/Cacheout/ViewModels/CacheoutViewModel.swift b/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
index 13a9811..ff0251b 100644
--- a/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
+++ b/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
@@ -172,14 +172,20 @@ class CacheoutViewModel: ObservableObject {
     }
 
     func selectAllSafe() {
-        for i in scanResults.indices where scanResults[i].category.riskLevel == .safe && !scanResults[i].isEmpty {
-            scanResults[i].isSelected = true
+        scanResults = scanResults.map { result in
+            var newResult = result
+            if newResult.category.riskLevel == .safe && !newResult.isEmpty {
+                newResult.isSelected = true
+            }
+            return newResult
         }
     }
 
     func deselectAll() {
-        for i in scanResults.indices {
-            scanResults[i].isSelected = false
+        scanResults = scanResults.map { result in
+            var newResult = result
+            newResult.isSelected = false
+            return newResult
         }
         deselectAllNodeModules()
     }
@@ -193,17 +199,29 @@ class CacheoutViewModel: ObservableObject {
     }
 
     func selectStaleNodeModules() {
-        for i in nodeModulesItems.indices where nodeModulesItems[i].isStale {
-            nodeModulesItems[i].isSelected = true
+        nodeModulesItems = nodeModulesItems.map { item in
+            var newItem = item
+            if newItem.isStale {
+                newItem.isSelected = true
+            }
+            return newItem
         }
     }
 
     func selectAllNodeModules() {
-        for i in nodeModulesItems.indices { nodeModulesItems[i].isSelected = true }
+        nodeModulesItems = nodeModulesItems.map { item in
+            var newItem = item
+            newItem.isSelected = true
+            return newItem
+        }
     }
 
     func deselectAllNodeModules() {
-        for i in nodeModulesItems.indices { nodeModulesItems[i].isSelected = false }
+        nodeModulesItems = nodeModulesItems.map { item in
+            var newItem = item
+            newItem.isSelected = false
+            return newItem
+        }
     }
 
     /// Menu bar label: show free GB in the tray