Run results for: Array.concat vs Array.prototype.concat.apply

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0

Browser: Firefox 138

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Array.prototype.concat.apply

722K/s

Array.prototype.concat.apply short form

717K/s

Array.prototype.concat.apply short form without new empty array at all

696K/s

Array.prototype.concat.apply short form without new empty array instance in apply

692K/s

Array.concat

634K/s

View exact numbers

Test name	Executions per second
✓ Array.prototype.concat.apply	722,030 Ops/sec
Array.prototype.concat.apply short form	716,587 Ops/sec
Array.prototype.concat.apply short form without new empty array at all	695,576 Ops/sec
Array.prototype.concat.apply short form without new empty array instance in apply	692,073 Ops/sec
Array.concat	633,760 Ops/sec

Script Preparation code:

var array1 = Array(400).fill().map(() => Math.round(Math.random() * 40));
var array2 = Array(400).fill().map(() => Math.round(Math.random() * 40));
var array3 = Array(400).fill().map(() => Math.round(Math.random() * 40));
var array4 = Array(400).fill().map(() => Math.round(Math.random() * 40));
var array5 = Array(400).fill().map(() => Math.round(Math.random() * 40));

Tests:

Array.concat
var others = array1.concat(array2, array3, array4, array5);
Array.prototype.concat.apply
var others = Array.prototype.concat.apply([], [array1, array2, array3, array4, array5]);
Array.prototype.concat.apply short form
var others = [].concat.apply([], [array1, array2, array3, array4, array5]);
Array.prototype.concat.apply short form without new empty array instance in apply
var others = [].concat.apply(array1, [array2, array3, array4, array5]);
Array.prototype.concat.apply short form without new empty array at all
var others = array1.concat.apply(array1, [array2, array3, array4, array5]);