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/63.0.3239.132 Safari/537.36

Browser: Chrome 63

Operating system: Windows

Device Platform: Other

Date tested: 2025 years ago

Test name	Executions per second
slice without any argument	4337038.0 Ops/sec
spread operator	2940557.8 Ops/sec
concat into empty array	3652139.0 Ops/sec
slice(0)	4172542.0 Ops/sec

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);

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