Benchmark: JS loops comparison

Script Preparation code:

var data = [...Array(10000).keys()]

Tests:

.map
const result = data.map(x => x + 1)
iterator loop
const result = []; for (const val of data) { result.push(val + 1); }
indexed loop (assign)
const result = new Array(data.length); for (let i = 0; i < data.length; i++) { result[i] = data[i] + 1; }
.forEach (assign)
const result = new Array(data.length); data.forEach((value, i) => result[i] = value + 1);
indexed loop (push)
const result = []; for (let i = 0; i < data.length; i++) { result.push(data[i] + 1); }
.forEach (push)
const result = []; data.forEach((value, i) => result.push(value + 1));

Rendered benchmark preparation results:

Previous results

ⓘ Get performance results from real users on your website with Request Metrics.

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0

Browser/OS: Firefox 123 on Linux

JS loops comparison (version: 3)