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; rv:124.0) Gecko/20100101 Firefox/124.0

Browser: Firefox 124

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

using plus operator

11.8M/s

using template literals

4.1M/s

using concat function

205K/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`; }