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typescript.large_response_memory

Stability High

Detects loading entire HTTP responses into memory without streaming.

Why It Matters

Large responses in memory:

OOM crashes — Unbounded response sizes exhaust memory
High latency — Must wait for entire download
Memory pressure — Affects concurrent requests

Example

// ❌ Before (entire response in memory)
async function downloadFile(url: string): Promise<Buffer> {
  const response = await axios.get(url, { responseType: 'arraybuffer' });
  return response.data; // Entire file in RAM!
}

// ✅ After (streaming response)
import { createWriteStream } from 'fs';
import { pipeline } from 'stream/promises';

async function downloadFile(url: string, path: string): Promise<void> {
  const response = await axios.get(url, { responseType: 'stream' });
  await pipeline(response.data, createWriteStream(path));
}

What Unfault Detects

response.data on unbounded responses
axios without responseType: ‘stream’
Missing content-length checks

Auto-Fix

Unfault can add streaming patterns or size limits.