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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/127.1 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 15

Operating system: iOS 15.8

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

using template literals

38K/s

using plus operator

37K/s

using concat function

30K/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`; }