Tinybench

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Introduction

Tinybench is a simple, tiny and lightweight benchmarking library. It is based entirely on Web APIs with precise timing, so the same benchmarks run in multiple JavaScript runtimes, including Node.js and Bun.

It reports statistically analysed latency and throughput, including standard deviation, margin of error, variance and percentiles, and emits Event/EventTarget-compatible events. It is part of the tinylibs family of small libraries, alongside tinypool and tinyspy.

Whatever tool you choose, benchmark results are only useful if they are stable. Pin the hardware or runner, run enough iterations to make variance visible, and treat a single noisy result as a reason to rerun, not to block a merge.

The source code is at tinylibs/tinybench on GitHub under the MIT licence, with about 2,400 stars; the most recent commit was on 11 November 2026.

Features

1. Multi-runtime: Web API based.
2. Statistics: Std dev, margin of error and percentiles.
3. Latency and throughput: Both measured.
4. Events: EventTarget compatible.
5. Tiny footprint: Minimal dependency.

Pros

1. Free to use: Open source under the MIT licence, so the core tool costs nothing to use.
2. Actively maintained: The repository had commits as recent as 11 November 2026.

Cons

1. Micro-benchmarks only: Not for load testing.

Usage and Links (Example)

npm install -D tinybench

import { Bench } from 'tinybench'
const bench = new Bench({ time: 100 })
bench.add('faster task', () => { 'a'.repeat(100) })
await bench.run()
console.table(bench.table())

Resources:

• Tinybench website

Pricing

Tinybench is free and open source under the MIT licence.

Recommended for?

1. JavaScript developers comparing implementations.

Conclusion

Tinybench is a precise, minimal benchmarking tool for JS.

Use it to compare implementations before optimising.

On CheckOps, Tinybench is filed under the Performance & load and Unit testing stages. Related tools listed here include Vitest, Jest, K6, hyperfine, BenchmarkDotNet and Artillery. When comparing them, weigh the licence, the languages and platforms each supports, whether it is self-hosted or managed, and how cleanly it slots into your existing CI pipeline. Details on this page were checked against the official website, documentation and repository on 11 November 2026.