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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

using plus operator

15K/s

using template literals

14K/s

using concat function

2K/s

View exact numbers

Script Preparation code:

const count = 10000;

Tests:

using plus operator
for (let i = 0; i < count; ++i) { let result = i result += 'px'; }
using concat function
for (let i = 0; i < count; ++i) { let result = i result = ''.concat(result, 'px'); }
using template literals
for (let i = 0; i < count; ++i) { let result = i result = `${result}px`; }