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JavaScript Benchmark Runner

Compare execution speed of two JavaScript code snippets side by side. Run configurable iterations and see average, min, and max times.

Frequently Asked Questions

How does the benchmark work?
Each snippet is warmed up briefly, then timed over N iterations. Results include average, min, and max execution times in milliseconds.
Is it accurate?
Browser benchmarks provide approximate results. Results can vary based on system load, JIT optimization, and other factors. Use for relative comparison, not absolute measurements.
Is the code sandboxed?
Code runs in a Function constructor context. It has access to the standard browser APIs but cannot access the page DOM directly.

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How to Use

  1. 1 Enter two JavaScript code snippets in the side-by-side editors.
  2. 2 Set the number of iterations to run.
  3. 3 Click **Run Benchmark** to compare execution times.
  4. 4 View average, min, and max times for each snippet.