Run results for: Array.prototype.concat vs spread operator - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
slice without any argument	5204006.0 Ops/sec
spread operator	3983812.0 Ops/sec
concat into empty array	2072069.0 Ops/sec
slice(0)	4293930.0 Ops/sec

Website performance monitoring

Script Preparation code:

var myArray = [ "hello", true, 7 ]

Tests:

slice without any argument
var other = myArray.slice();
spread operator
var other = [ ...myArray ]
concat into empty array
[].concat(myArray);
slice(0)
var other = myArray.slice(0);