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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
Array.concat	2282107.8 Ops/sec
Array.prototype.concat.apply	2223793.2 Ops/sec
Array.prototype.concat.apply short form	2242323.2 Ops/sec
Array.prototype.concat.apply short form without new empty array instance in apply	2260469.0 Ops/sec
Array.prototype.concat.apply short form without new empty array at all	2358585.5 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]);

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

Compare direct concat call with apply for multiple arrays concatenation

Array.concat

Array.prototype.concat.apply

Array.prototype.concat.apply short form

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

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