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perf(storage): replace Promise.all map with single range query for fetchHistoricalRatesBatch

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Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>
This commit is contained in:
google-labs-jules[bot] 2026-08-12 16:21:04 +00:00
parent b399b95263
commit a01a242acd
1 changed files with 43 additions and 6 deletions
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49
src/storage.ts
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@ -218,13 +218,50 @@ export async function fetchHistoricalRatesBatch(dates: string[]): Promise<Record
if (isTauri()) {
return await invoke<Record<string, Record<string, number>>>("fetch_historical_rates_batch", { dates });
}
const uniqueDates = Array.from(new Set(dates));
const results: Record<string, Record<string, number>> = {};
await Promise.all(
dates.map(async (date) => {
const rates = await fetchHistoricalRates(date);
if (rates) results[date] = rates;
})
);
if (uniqueDates.length === 0) return results;
if (uniqueDates.length === 1) {
const rates = await fetchHistoricalRates(uniqueDates[0]!);
if (rates) results[uniqueDates[0]!] = rates;
return results;
}
const minDate = uniqueDates.reduce((a, b) => (a < b ? a : b));
const maxDate = uniqueDates.reduce((a, b) => (a > b ? a : b));
const res = await fetch(`https://api.frankfurter.dev/v1/${minDate}..${maxDate}?from=USD`);
const json = await res.json();
if (json?.rates) {
const availableDates = Object.keys(json.rates).sort();
for (const reqDate of uniqueDates) {
let matchDate: string | undefined = undefined;
for (let i = 0; i < availableDates.length; i++) {
if (availableDates[i]! <= reqDate) matchDate = availableDates[i];
else break;
}
// In case there is a date requested prior to the first available date
// Frankfurter might not return a rate, fallback to individual query
if (!matchDate) {
const rates = await fetchHistoricalRates(reqDate);
if (rates) results[reqDate] = rates;
continue;
}
const rates = json.rates[matchDate];
if (rates) {
const out: Record<string, number> = { USD: 1 };
for (const [k, v] of Object.entries(rates as Record<string, number>)) {
if (v > 0) out[k.toUpperCase()] = v;
}
results[reqDate] = out;
}
}
}
return results;
} catch (e) {
console.warn("fetchHistoricalRatesBatch failed", e);