fathom-performance-tuning

# Fathom Performance Tuning ## Overview Fathom's meeting intelligence API serves transcript downloads, bulk meeting sync, and action item aggregation. Transcript payloads are large (50-500KB each), making bulk sync of historical meetings a major latency bottleneck. The 60 req/min rate limit requires careful batching. Caching immutable transcripts aggressively while keeping action item data fresh reduces download latency by 70% and prevents rate limit errors during bulk operations. ## Caching Strategy ```typescript const cache = new Map<string, { data: any; expiry: number }>(); const TTL = { transcript: 3_600_000, actionItems: 120_000, meetings: 300_000 }; async function cached(key: string, ttlKey: keyof typeof TTL, fn: () => Promise<any>) { const entry = cache.get(key); if (entry && entry.expiry > Date.now()) return entry.data; const data = await fn(); cache.set(key, { data, expiry: Date.now() + TTL[ttlKey] }); return data; } // Transcripts are immutable — cache 1hr. Action items change — cache 2min. ``` ## Batch Operations ```typescript async function syncMeetingsBatch(client: any, ids: string[], batchSize = 50) { const results = []; for (let i = 0; i < ids.length; i += batchSize) { const batch = ids.slice(i, i + batchSize); const res = await Promise.all(batch.map(id => client.getTranscript(id))); results.push(...res); if (i + batchSize < ids.length) await new Promise(r => setTimeout(r, 61_000)); // 60 req/min } return results; } ``` #...