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⚡ Bolt: Optimize Calendar shift flights filtering performance #48

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⚡ Bolt: Optimize Calendar shift flights filtering performance #48

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51 changes: 24 additions & 27 deletions package-lock.json
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33 changes: 26 additions & 7 deletions src/screens/CalendarScreen.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -220,18 +220,37 @@ export default function CalendarScreen() {
try {
const { arrivals, departures } = await fetchAirportScheduleRaw(airportCode);
const allF = [...arrivals, ...departures];

const ranges: { sTS: number, eTS: number, iso: string }[] = [];
Object.keys(localData).forEach(iso => {
const sh = localData[iso].find(e => e.title.includes('Lavoro'));
if (sh) {
const sTS = new Date(sh.startDate).getTime() / 1000;
const eTS = new Date(sh.endDate).getTime() / 1000;
const cnt = allF.filter(f => {
const ts = f.flight?.time?.scheduled?.arrival || f.flight?.time?.scheduled?.departure;
return ts && ts >= sTS && ts <= eTS;
}).length;
if (dict[iso]) dict[iso].flightCount = cnt; else dict[iso] = { weatherText: 'N/A', weatherIcon: '❓', flightCount: cnt };
ranges.push({
sTS: new Date(sh.startDate).getTime() / 1000,
eTS: new Date(sh.endDate).getTime() / 1000,
iso
});
}
});

const counts: Record<string, number> = {};
ranges.forEach(r => counts[r.iso] = 0);

allF.forEach(f => {
const ts = f.flight?.time?.scheduled?.arrival || f.flight?.time?.scheduled?.departure;
if (ts) {
for (const r of ranges) {
if (ts >= r.sTS && ts <= r.eTS) {
counts[r.iso]++;
Comment on lines +237 to +244
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Copilot AI Apr 7, 2026

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The new counting logic still scans every ranges entry for each flight (for (const r of ranges) inside allF.forEach), which keeps worst-case complexity at O(flights × ranges). If ranges can grow beyond a week (e.g., month view), consider indexing/sorting ranges (e.g., sort by sTS and use a sweep/binary search, or bucket by ISO day) to avoid a full ranges scan per flight.

Suggested change
ranges.forEach(r => counts[r.iso] = 0);
allF.forEach(f => {
const ts = f.flight?.time?.scheduled?.arrival || f.flight?.time?.scheduled?.departure;
if (ts) {
for (const r of ranges) {
if (ts >= r.sTS && ts <= r.eTS) {
counts[r.iso]++;
const rangesByDay: Record<number, { sTS: number, eTS: number, iso: string }[]> = {};
ranges.forEach(r => {
counts[r.iso] = 0;
const startDay = Math.floor(r.sTS / 86400);
const endDay = Math.floor(r.eTS / 86400);
for (let day = startDay; day <= endDay; day++) {
if (!rangesByDay[day]) rangesByDay[day] = [];
rangesByDay[day].push(r);
}
});
allF.forEach(f => {
const ts = f.flight?.time?.scheduled?.arrival || f.flight?.time?.scheduled?.departure;
if (ts) {
const day = Math.floor(ts / 86400);
const dayRanges = rangesByDay[day];
if (dayRanges) {
for (const r of dayRanges) {
if (ts >= r.sTS && ts <= r.eTS) {
counts[r.iso]++;
}

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}
}
}
});

ranges.forEach(r => {
const cnt = counts[r.iso];
if (dict[r.iso]) dict[r.iso].flightCount = cnt; else dict[r.iso] = { weatherText: 'N/A', weatherIcon: '❓', flightCount: cnt };
});
} catch (e) { if (__DEV__) console.warn('[calFlights]', e); }
setDailyStats(dict);
};
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