Observability & Monitoring

Benchmark.js

High-resolution timers for statistically significant benchmarking results.

Status
UnmaintainedGitHub repository has been archived.
Last checked
Checked · Oct 6, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

Benchmark.js is a JavaScript library that provides high-resolution timers and returns statistically significant results. It's useful for developers who need to measure the performance of their code accurately.

Benchmark.js stands out with its focus on providing statistically significant and precise timing measurements, making it ideal for developers who need to ensure their performance tests are both accurate and reliable.

When it fits — and when it doesn’t

A good fit for

  • JavaScript developers who need precise and reliable benchmarking results for their applications.

  • Teams working on performance-critical JavaScript projects that require accurate timing measurements.

Look elsewhere if

  • Projects requiring real-time or near-real-time performance monitoring, as Benchmark.js is more suited for offline testing scenarios.

  • Applications where the overhead of high-resolution timers might impact the benchmarking results themselves.

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited integrations with other performance testing tools

    Benchmark.js primarily focuses on standalone JavaScript benchmarking and lacks built-in support for integration with popular CI/CD pipelines or monitoring systems.

  2. 02

    Complex setup for non-trivial benchmarks

    Setting up comprehensive benchmarks that account for various environmental factors can be complex and requires a deep understanding of the library's API and statistical methods.

  3. 03

    Performance overhead in certain environments

    The high-resolution timers used by Benchmark.js can introduce some performance overhead, which may skew results in low-power or heavily loaded systems.

What it does well

  • High-resolution timers for accurate performance measurement.

  • Statistically significant results to ensure reliable benchmarking.

  • Cross-browser compatibility and support for modern JavaScript features.

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up Benchmark.js

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →