Run results for: rest parameters vs arguments (no extra args) actual test

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:146.0) Gecko/20100101 Firefox/146.0

Browser: Firefox 146

Operating system: Linux

Device Platform: Desktop

Date tested: 7 months ago

rest parameter

9K/s

arguments

5K/s

View exact numbers

Test name	Executions per second
✓ rest parameter	9,323 Ops/sec
arguments	4,662 Ops/sec

Script Preparation code:

window.els = [];

function t1() {
  window.els.push(...arguments);
}

function t2(...args) {
  window.els.push(...args);
}

Tests:

arguments
window.els.length = 0; for (let i = 0; i < 2000; i++) { t1('div', {class: 'foo'}, i, i + 1, i + 2); }
rest parameter
window.els.length = 0; for (let i = 0; i < 2000; i++) { t2('div', {class: 'foo'}, i, i + 1, i + 2); }