zstd in node:zlib

stream.js

import { createReadStream, createWriteStream } from 'node:fs';
import zlib from 'node:zlib';
import { pipeline } from 'node:stream/promises';

async function backupFile(filePath) {
  const backupPath = `${filePath}.zst`;
  const source = createReadStream(filePath);
  const compressStream = zlib.createZstdCompress({ params: { [zlib.constants.ZSTD_c_compressionLevel]: 3 } });
  const destination = createWriteStream(backupPath);
  await pipeline(source, compressStream, destination);
}

sync.js

import { readFileSync, writeFileSync } from 'node:fs';
import zlib from 'node:zlib';

function backupFileSync(filePath) {
  const data = readFileSync(filePath);
  const compressed = zlib.zstdCompressSync(data, { params: { [zlib.constants.ZSTD_c_compressionLevel]: 3 } });
  const backupPath = `${filePath}.zst`;
  writeFileSync(backupPath, compressed);
}