How to manage large datasets and avoid "JavaScript heap out of memory" errors in Node.js?

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Instead of loading your entire dataset into memory at once, stream it or process it in smaller chunks. This can be a game changer for filesystem indexing.

const fs = require('fs');
const readline = require('readline');

const rl = readline.createInterface({
  input: fs.createReadStream('big-file.txt'),
  crlfDelay: Infinity
});

rl.on('line', (line) => {
  // Process each line one by one
});

This drastically reduces memory usage because you’re only holding a tiny part of the data at a time.