From c73bb077bf4ee4d09d462eab331502a1654e9d4c Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Tue, 3 Mar 2026 02:40:30 +0000
Subject: [PATCH] perf: optimize array deduplication in backup endpoints

- Replace spread operator with iterative Set.add() to avoid intermediate array allocation.
- Add conditional assignment to avoid unnecessary updates when no new endpoints are found.
- Improve memory efficiency and CPU performance during backup endpoint merging.

Co-authored-by: sunnylqm <615282+sunnylqm@users.noreply.github.com>
---
 src/client.ts | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/client.ts b/src/client.ts
index 48ad5d1b..cf15021b 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -344,9 +344,14 @@ export class Pushy {
         const remoteEndpoints = await resp.json();
         log('fetch endpoints:', remoteEndpoints);
         if (Array.isArray(remoteEndpoints)) {
-          server.backups = Array.from(
-            new Set([...(server.backups || []), ...remoteEndpoints]),
-          );
+          const backups = server.backups || [];
+          const set = new Set(backups);
+          for (const endpoint of remoteEndpoints) {
+            set.add(endpoint);
+          }
+          if (set.size !== backups.length) {
+            server.backups = Array.from(set);
+          }
         }
       } catch (e: any) {
         log('failed to fetch endpoints from: ', server.queryUrls);