From d1aae9219c906ae924a445a0a1c6466eaa301604 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Sat, 11 Apr 2026 05:12:49 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=20Bolt:=20Batch=20@Published=20array?=
 =?UTF-8?q?=20updates=20to=20reduce=20UI=20re-renders?=
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Replaces `for` loops with `.map` assignments when mutating arrays within `CacheoutViewModel` to prevent individual elements triggering sequential UI redraw notifications.

Co-authored-by: acebytes <2820910+acebytes@users.noreply.github.com>
---
 .jules/bolt.md                                |  3 ++
 .../ViewModels/CacheoutViewModel.swift        | 40 +++++++++++++++----
 2 files changed, 35 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..9f23453
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2024-04-11 - [Batch @Published Array Mutations]
+**Learning:** Mutating individual elements of a `@Published` array inside a loop triggers a UI update for each change.
+**Action:** For collections of value types, use functional methods like `.map` to batch updates into a single assignment, significantly reducing unnecessary UI recalculations.
diff --git a/Sources/Cacheout/ViewModels/CacheoutViewModel.swift b/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
index 13a9811..877390e 100644
--- a/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
+++ b/Sources/Cacheout/ViewModels/CacheoutViewModel.swift
@@ -172,14 +172,23 @@ class CacheoutViewModel: ObservableObject {
     }
 
     func selectAllSafe() {
-        for i in scanResults.indices where scanResults[i].category.riskLevel == .safe && !scanResults[i].isEmpty {
-            scanResults[i].isSelected = true
+        // Optimization: Batch @Published updates to avoid multiple UI view redraws
+        // Mutating individual elements of a @Published array inside a loop triggers a UI update for each change.
+        scanResults = scanResults.map { result in
+            var newResult = result
+            if result.category.riskLevel == .safe && !result.isEmpty {
+                newResult.isSelected = true
+            }
+            return newResult
         }
     }
 
     func deselectAll() {
-        for i in scanResults.indices {
-            scanResults[i].isSelected = false
+        // Optimization: Batch @Published updates to avoid multiple UI view redraws
+        scanResults = scanResults.map { result in
+            var newResult = result
+            newResult.isSelected = false
+            return newResult
         }
         deselectAllNodeModules()
     }
@@ -193,17 +202,32 @@ class CacheoutViewModel: ObservableObject {
     }
 
     func selectStaleNodeModules() {
-        for i in nodeModulesItems.indices where nodeModulesItems[i].isStale {
-            nodeModulesItems[i].isSelected = true
+        // Optimization: Batch @Published updates to avoid multiple UI view redraws
+        nodeModulesItems = nodeModulesItems.map { item in
+            var newItem = item
+            if item.isStale {
+                newItem.isSelected = true
+            }
+            return newItem
         }
     }
 
     func selectAllNodeModules() {
-        for i in nodeModulesItems.indices { nodeModulesItems[i].isSelected = true }
+        // Optimization: Batch @Published updates to avoid multiple UI view redraws
+        nodeModulesItems = nodeModulesItems.map { item in
+            var newItem = item
+            newItem.isSelected = true
+            return newItem
+        }
     }
 
     func deselectAllNodeModules() {
-        for i in nodeModulesItems.indices { nodeModulesItems[i].isSelected = false }
+        // Optimization: Batch @Published updates to avoid multiple UI view redraws
+        nodeModulesItems = nodeModulesItems.map { item in
+            var newItem = item
+            newItem.isSelected = false
+            return newItem
+        }
     }
 
     /// Menu bar label: show free GB in the tray