apollo-performance-tuning

# Apollo Performance Tuning ## Overview Optimize Apollo.io API performance through response caching, connection pooling, bulk operations, parallel fetching, and result slimming. Key insight: **search is free but slow (~500ms), enrichment costs credits** — cache aggressively and batch enrichment calls. ## Prerequisites - Valid Apollo API key - Node.js 18+ ## Instructions ### Step 1: Connection Pooling Reuse TCP connections to avoid TLS handshake overhead on every request. ```typescript // src/apollo/optimized-client.ts import axios from 'axios'; import https from 'https'; const httpsAgent = new https.Agent({ keepAlive: true, maxSockets: 10, maxFreeSockets: 5, timeout: 30_000, }); export const optimizedClient = axios.create({ baseURL: 'https://api.apollo.io/api/v1', headers: { 'Content-Type': 'application/json', 'x-api-key': process.env.APOLLO_API_KEY! }, httpsAgent, timeout: 15_000, }); ``` ### Step 2: Response Caching with Per-Endpoint TTLs ```typescript // src/apollo/cache.ts import { LRUCache } from 'lru-cache'; // Different TTLs based on data volatility const CACHE_TTLS: Record<string, number> = { '/organizations/enrich': 24 * 60 * 60 * 1000, // 24h — company data rarely changes '/people/match': 4 * 60 * 60 * 1000, // 4h — contact data changes occasionally '/mixed_people/api_search': 15 * 60 * 1000, // 15min — search results are dynamic '/mixed_companies/search': 30 * 60 * 1000, // 30min — company search '/co...