Run results for: String.prototype.concat vs Array.prototype.join

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36

Browser: Chrome 85

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:



var sArr = [];

Tests:

String concatentation
let str = ""; for (let i = 1000; i > 0; i--) { str += "String concatenation. "; }
Array join (using indexes)
const sArr = []; for (let i = 1000; i > 0; i--) { sArr[i] = "String concatenation. "; } const str = sArr.join("");
Array join (using push)
const sArr = []; for (let i = 1000; i > 0; i--) { sArr.push("String concatenation. "); } const str = sArr.join("");