JavaScript Benchmark Builder

Create and run simple JavaScript benchmarks to compare the relative performance of different code snippets in your browser.

Global Configuration

Iterations per Test Case:

Number of times each snippet is run to average its execution time.

JavaScript Code Snippet:

Browser-based JavaScript benchmarks can be influenced by many factors (browser extensions, other tabs, system load, JIT compiler optimizations). Results are best for relative comparisons within the same session.
For highly accurate micro-benchmarks, specialized libraries (e.g., Benchmark.js) and controlled environments (e.g., Node.js) are recommended.
Ensure code snippets are self-contained. Avoid relying on global state that might change between runs or cases.
Very short-running snippets might show high variance or be affected by timer resolution inaccuracies.