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The fastest directory crawler & globbing library for NodeJS. Crawls 1m files in < 1s
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The Fastest Directory Crawler & Globber for NodeJS

The Fastest: Nothing similar (in the NodeJS world) beats fdir in speed. It can easily crawl a directory containing 1 million files in < 1 second.

💡 Stupidly Easy: fdir uses expressive Builder pattern to build the crawler increasing code readability.

🤖 Zero Dependencies: fdir only uses NodeJS fs & path modules.

🕺 Astonishingly Small: < 2KB in size gzipped & minified.

🔥 All Node Versions Supported: Unlike other similar libraries that have dropped support for Node versions < 10, fdir supports all versions >= 6.

🖮 Hackable: Extending fdir is extremely simple now that the new Builder API is here. Feel free to experiment around.


Do you like this project? Support me by donating, creating an issue, becoming a stargazer or opening a pull request. Thanks.

🚄 Quickstart


You can install using npm:

$ npm i fdir

or Yarn:

$ yarn add fdir


const fdir = require("fdir").default;

// create the builder
const api = new fdir().withFullPaths().crawl("path/to/dir");

// get all files in a directory synchronously
const files = api.sync();

// or asynchronously
api.withPromise().then((files) => {
  // do something with the result here.


I have written an in-depth documentation here.

📊 Benchmarks:


  • Intel i7 7th Generation (7700HQ)
  • 16 GB of RAM
  • 256 GB SSD
  • OS: Manjaro Linux
  • Directory Size: < 2k files


  • Some people asked that I benchmark no-op (without options) version of fdir. I did and found no performance difference. The results were identical. (I didn't include it here as it wasn't anything special.)

  • Some other people were doubtful about the authenticity of these results due to frequency scaling, process overload, disk warmup etc. So I have updated the benchmark with new results that should resolve all those doubts. Here's the process I followed:

    • Hard shutdown the laptop (a couple of times just to be sure) to clear disk, ram cache etc.
    • Login directly to a TTY (avoiding any unnecessary process from starting).
    • Disable CPU Scaling using
    $ sudo cpupower frequency-set --governor performance
    • Run the benchmark

The Fastest Globber

Last updated: May 13, 2020 (fdir v3.3.0)

$ yarn bench:glob

glob pattern used: **.js & **/**.js

Node v13.13.0

Synchronous Asynchronous

The Fastest Directory Crawler

Last updated: May 10, 2020 (fdir v3.0.0)

$ yarn bench

Node v14.2.0:

Synchronous Asynchronous

Node v8.7.0:

Older versions of fdir (1.x & 2.x) used synchronous lstat call (lstatSync) in the asynchronous API to acheive speed on Node < 10. This has been fixed in fdir 3.0.0.



Copyright (c) 2020 Abdullah Atta under MIT. Read full text here.

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