Run results for: Reverse string with more tests

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36

Browser: Chrome 98

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array.from, reverse, join	166.2 Ops/sec
Iterate, concat	76.9 Ops/sec
Iterate, push, join	57.1 Ops/sec
iterate concat to first (charAt)	76.9 Ops/sec
iterate concat to first	76.9 Ops/sec
split, iterate, concat to first	327.2 Ops/sec
split, reverse, join	205.0 Ops/sec

Script Preparation code:

var string = document.documentElement.outerHTML.repeat(100);

Tests:

Array.from, reverse, join
Array.from(string).reverse().join("");
Iterate, concat
var newString = ""; for (let i = string.length - 1; i--;) { newString += string[i]; }
Iterate, push, join
var newChars = []; for (let i = string.length - 1; i--;) { newChars.push(string[i]); } newChars.join("")
iterate concat to first (charAt)
let i = string.length - 1; let result = string.charAt(i); for (;i--;) { result += string.charAt(i); }
iterate concat to first
let i = string.length - 1; let result = string[i]; for (;i--;) { result += string[i]; }
split, iterate, concat to first
const parts = string.split(""); let i = parts.length - 1; let result = parts[i]; for (;i--;) { result += parts[i]; }
split, reverse, join
string.split("").reverse().join("");