Client Polling & Stale-State Merge
dual-fetch sports loop with odds preservation
Published: 2026-06-26 | Project: Software as Glass Monorepo | Discipline: Distributed Systems & High-Throughput State
Author: Nicholas Alexander MacAskill — Founder & CTO, Flocano Labs | Canonical: https://www.nicholasmacaskill.com/dossier/memoirs-client-polling
Dual-Fetch Client Loop
MusicCodeBanner runs a 10-second interval that hits the fast stats route before the full sports route. On stats success, it rebuilds the sports ticker with fresh volume/profit while keeping existing odds lines until the full payload arrives.
const statsRes = await fetch('/memoirs/api/sports/stats', { cache: 'no-store' });
if (statsRes.ok) {
const stats = await statsRes.json();
setSportsItems((prev) => {
const odds = prev.filter((i) => i.id.startsWith('live-') || i.id === 'f1');
const oddsItems = odds.length > 0 && !odds[0]?.code.includes('LOADING')
? odds
: [{ id: 's1', code: '⚾ UPCOMING MLB GAMES: LOADING...' }];
return [
{ id: 'stat-vol', code: `💰 STATS | BASEBALL VOLUME: ${stats.volume}` },
{ id: 'stat-profit', code: `📈 STATS | BASEBALL PROFIT: ${stats.profit}` },
{ id: 'stat-win', code: prev.find((i) => i.id === 'stat-win')?.code ?? '🎯 STATS | BASEBALL WIN RATE: LOADING...' },
...oddsItems,
];
});
}
const res = await fetch('/memoirs/api/sports', { cache: 'no-store' });Build & Deploy Guards
Sports routes export dynamic = 'force-dynamic' so Next.js does not pre-render Polymarket fetches at build time (which previously caused Vercel build timeouts). The full route sets maxDuration = 60 to allow cold PnL computation on serverless instances.
