diff --git a/.jules/bolt.md b/.jules/bolt.md
index 91541609..0bda88a5 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -9,3 +9,7 @@
 
 **Learning:** Using `on:keyup` for search input debouncing triggers unnecessary API calls on navigation keys (arrows, home, end) and misses changes from paste/cut. Svelte's reactive statements `$: debounce(value)` provide a robust, declarative way to trigger debouncing only when the value actually changes.
 **Action:** Replace `on:keyup` handlers with reactive statements for input debouncing to improve performance and correctness.
+
+## 2024-10-31 - [Array Filter Optimizations]
+**Learning:** Using Array.prototype.includes() inside a filter loop creates an O(N*M) time complexity bottleneck. Precomputing a Set before the loop converts the inner check to O(1) time complexity.
+**Action:** Use Sets to perform membership checks when filtering arrays against other arrays.
diff --git a/src/routes/api/proposals/voters/add/+server.ts b/src/routes/api/proposals/voters/add/+server.ts
index 62f2caf8..bd4f53df 100644
--- a/src/routes/api/proposals/voters/add/+server.ts
+++ b/src/routes/api/proposals/voters/add/+server.ts
@@ -23,7 +23,9 @@ export async function GET() {
 			?.setValue()
 			.values.map((voter) => voter.addressValue().value.toString('hex')) ?? [];
 
-	const newVoters = owners.filter((owner) => !voters.includes(owner)).slice(0, 50);
+	// ⚡ Bolt: Cache array as a Set for O(1) lookups instead of O(N) includes
+	const votersSet = new Set(voters);
+	const newVoters = owners.filter((owner) => !votersSet.has(owner)).slice(0, 50);
 	if (newVoters.length === 0) return json({ newVoters }, { status: 200 });
 
 	const votingContract = await metaNamesSdk.contractRepository.getContract({
diff --git a/src/routes/api/proposals/voters/remove/+server.ts b/src/routes/api/proposals/voters/remove/+server.ts
index d024e90f..131adfe7 100644
--- a/src/routes/api/proposals/voters/remove/+server.ts
+++ b/src/routes/api/proposals/voters/remove/+server.ts
@@ -25,7 +25,9 @@ export async function GET() {
 			?.setValue()
 			.values.map((voter) => voter.addressValue().value.toString('hex')) ?? [];
 
-	const votersToRemove = voters.filter((voter) => !owners.includes(voter)).slice(0, 50);
+	// ⚡ Bolt: Cache array as a Set for O(1) lookups instead of O(N) includes
+	const ownersSet = new Set(owners);
+	const votersToRemove = voters.filter((voter) => !ownersSet.has(voter)).slice(0, 50);
 	if (votersToRemove.length === 0) return json({ newVoters: votersToRemove }, { status: 200 });
 
 	const votingContract = await metaNamesSdk.contractRepository.getContract({