Run results for: Native JS: concatenate string with + vs template literals vs String.concat

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

using plus operator

58K/s

using template literals

57K/s

using concat function

43K/s

View exact numbers

Script Preparation code:

var name = "name";
var id = "id";

Tests:

using plus operator
for (let i = 0; i < 80; ++i) { let result = id + ": 1, " + name + ": someItem"; }
using concat function
for (let i = 0; i < 80; ++i) { let result = "".concat(id, ": 1, ", name, ": someItem"); }
using template literals
for (let i = 0; i < 80; ++i) { let result = `${id}: 1, ${name}: someItem`; }