This document discusses best practices for using jsPerf, a tool for benchmarking JavaScript performance. It outlines common pitfalls to avoid like inaccurate timers, browser bugs, lack of statistical significance, unfair comparisons, asynchronous tests, and not properly setting up, preparing, and tearing down tests. The key recommendations are to only include the minimum code in each test, reset variables between tests, avoid randomness, don't test asynchronous code synchronously, and understand how Benchmark.js works for advanced usage. Following these guidelines will produce more accurate and reliable benchmark results.