customerio-performance-tuning

name	customerio-performance-tuning
description	Optimize Customer.io API performance for high throughput. Use when improving response times, implementing connection pooling, batching, caching, or regional routing. Trigger: "customer.io performance", "optimize customer.io", "customer.io latency", "customer.io connection pooling".
allowed-tools	Read, Write, Edit, Bash(npm:*), Bash(npx:*), Glob, Grep
version	1.14.0
license	MIT
author	Jeremy Longshore <[e-mail]>
tags	["saas","customer-io","performance","optimization"]
compatibility	Designed for Claude Code

Customer.io Performance Tuning

Overview

Optimize Customer.io API performance for high-volume integrations: HTTP connection pooling, identify deduplication caching, event batching with flush control, fire-and-forget async tracking, and regional routing.

Prerequisites

• Working Customer.io integration
• Understanding of your traffic patterns and volume
• Monitoring to measure improvement (see customerio-observability)

Performance Targets

Operation	Baseline	Optimized	Technique
Single identify	~200ms	~80ms	Connection pooling
Single track	~200ms	~80ms	Connection pooling
100 events batch	~20s serial	~500ms	Parallel batching
Duplicate identify	~200ms	~0ms	Dedup cache
Non-critical track	Blocking	Non-blocking	Fire-and-forget

Instructions

Step 1: HTTP Connection Pooling

// lib/customerio-pooled.ts
import { TrackClient, RegionUS } from "customerio-node";
import https from "https";

// The customerio-node SDK creates new connections by default.
// Reuse connections with a keep-alive agent.
const agent = new https.Agent({
  keepAlive: true,
  maxSockets: 25,        // Max concurrent connections
  maxFreeSockets: 10,    // Keep idle connections open
  timeout: ,        
  : , 
});




https. = agent;


 cio =  (
  process..!,
  process..!,
  { :  }
);

 { cio };