LangChain Performance Tuning

Overview

Optimize LangChain apps for production: measure baseline latency, implement caching, batch with concurrency control, stream for perceived speed, optimize prompts for fewer tokens, and select the right model for each task.

Step 1: Benchmark Baseline

async function benchmark(
  chain: { invoke: (input: any) => Promise<any> },
  input: any,
  iterations = 5,
) {
  const times: number[] = [];