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⚡ Bolt: [React 렌더링 최적화] 캘린더 그리드 메모이제이션 적용 #1217

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Merged
seonghobae merged 4 commits into from
Aug 3, 2026
Merged

⚡ Bolt: [React 렌더링 최적화] 캘린더 그리드 메모이제이션 적용 #1217

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7cd662f
feat(frontend): 메모이제이션으로 캘린더 월간 뷰 O(N) 리렌더링 방지
seonghobae Aug 2, 2026
afce048
feat(frontend): 캘린더 월간 뷰 그리드 렌더링 메모이제이션 최적화
seonghobae Aug 2, 2026
e1ef356
docs(calendar): remove unverified performance claims
seonghobae Aug 3, 2026
ad5b630
Merge branch 'develop' into bolt-calendar-grid-memoization-1294152274…
opencode-agent[bot] Aug 3, 2026
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32 changes: 19 additions & 13 deletions frontend/src/components/calendar/CalendarMonthView.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -20,26 +20,32 @@ export function CalendarMonthView({ visibleMonthEvents }: Props) {
return grouped;
}, [visibleMonthEvents]);

// Memoize the React element array so unrelated parent renders can reuse
// the 35-cell grid while monthEventsByDay is unchanged.
const gridCells = useMemo(() => {
return Array.from({ length: 35 }).map((_, i) => {
const dayEvents = monthEventsByDay.get(i) ?? [];
return (
<div key={i} className="min-h-[84px] p-2 sm:min-h-[100px]">
<span className={`text-sm font-semibold ${i % 7 === 0 ? 'text-red-500' : i % 7 === 6 ? 'text-blue-500' : 'text-muted-foreground'}`}>{i < 31 ? i + 1 : ''}</span>
{dayEvents.map((event) => (
<div key={event.id} className={`mt-1 rounded px-1.5 py-1 text-[10px] font-semibold leading-tight sm:px-2 sm:text-xs ${event.monthClassName}`}>
{event.time}<span className="hidden sm:inline"> {event.title}</span>
</div>
))}
</div>
);
});
}, [monthEventsByDay]);

return (
<div className="h-full rounded-2xl border border-border bg-card shadow-sm flex flex-col overflow-hidden">
<div className="grid grid-cols-7 border-b border-border bg-secondary/50 text-center text-sm font-semibold py-3">
<div className="text-red-500">일</div><div>월</div><div>화</div><div>수</div><div>목</div><div>금</div><div className="text-blue-500">토</div>
</div>
<div className="grid grid-cols-7 grid-rows-5 flex-1 divide-x divide-y divide-border">
{/* Simulated Grid Cells */}
{Array.from({ length: 35 }).map((_, i) => {
const dayEvents = monthEventsByDay.get(i) ?? [];
return (
<div key={i} className="min-h-[84px] p-2 sm:min-h-[100px]">
<span className={`text-sm font-semibold ${i % 7 === 0 ? 'text-red-500' : i % 7 === 6 ? 'text-blue-500' : 'text-muted-foreground'}`}>{i < 31 ? i + 1 : ''}</span>
{dayEvents.map((event) => (
<div key={event.id} className={`mt-1 rounded px-1.5 py-1 text-[10px] font-semibold leading-tight sm:px-2 sm:text-xs ${event.monthClassName}`}>
{event.time}<span className="hidden sm:inline"> {event.title}</span>
</div>
))}
</div>
);
})}
{gridCells}
</div>
</div>
);
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