From 0cd11c710225144c851bd9084ec95cced5ce321c Mon Sep 17 00:00:00 2001
From: anyulled <100741+anyulled@users.noreply.github.com>
Date: Fri, 24 Apr 2026 08:40:13 +0000
Subject: [PATCH] feat: Optimize schedule filtering using Set lookups

Replaces O(N) Array.includes() with O(1) Set.has() during the schedule filtering operation to improve performance.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
---
 components/schedule/ScheduleContainer.tsx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/schedule/ScheduleContainer.tsx b/components/schedule/ScheduleContainer.tsx
index 33d877a4..805289b1 100644
--- a/components/schedule/ScheduleContainer.tsx
+++ b/components/schedule/ScheduleContainer.tsx
@@ -20,7 +20,9 @@ export default function ScheduleContainer({ initialSchedule, year }: Readonly<Sc
       return initialSchedule;
     }
 
-    const filterSessions = (sessions: GridSession[]) => sessions.filter((s) => savedSessionIds.includes(s.id) || s.isServiceSession);
+    // Convert savedSessionIds to a Set to improve lookup performance from O(N) to O(1)
+    const savedIdsSet = new Set(savedSessionIds);
+    const filterSessions = (sessions: GridSession[]) => sessions.filter((s) => savedIdsSet.has(s.id) || s.isServiceSession);
 
     return initialSchedule.map((day) => ({
       ...day,