What is JavaScript benchmarking and why is it important?

What is JavaScript benchmarking and why is it important?

JavaScript benchmarking is the process of measuring the performance of JavaScript code. It's important because it helps developers identify bottlenecks and optimize their code for better performance.

How can I benchmark my JavaScript code?

You can use tools like Benchmark.js or the built-in performance.now() method to measure execution time and compare different code snippets.

What are some common pitfalls in JavaScript benchmarking?

Common pitfalls include not accounting for JIT compilation, running benchmarks in a non-isolated environment, and not repeating tests enough times to get reliable results.

Can you give me an example of a benchmarking test?

Sure! Here's a simple example using Benchmark.js:

const Benchmark = require('benchmark');
const suite = new Benchmark.Suite();

suite.add('Test 1', function() {
  // code to benchmark
})
.add('Test 2', function() {
  // another code to benchmark
})
.on('complete', function() {
  console.log('Fastest is ' + this.filter('fastest').map('name'));
})
.run();