Run results for: Array concat vs spread operator vs push with two arrays

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; BLA-L29) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Mobile Safari/537.36 OPR/59.1.2926.54067

Browser: Opera Mobile 59

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
Array.prototype.concat	1324787.0 Ops/sec
spread operator twice	3466902.8 Ops/sec
Push	3887675.8 Ops/sec

Tests:

Array.prototype.concat
var arr1 = [ "the", "quick", "brown", "fox", "jumps" ]; var arr2 = [ "over", "the", "lazy", "dog" ]; var other = arr1.concat(arr2);
spread operator twice
var arr1 = [ "the", "quick", "brown", "fox", "jumps" ]; var arr2 = [ "over", "the", "lazy", "dog" ]; var other = [ ...arr1, ...arr2 ];
Push
var arr1 = [ "the", "quick", "brown", "fox", "jumps" ]; var arr2 = [ "over", "the", "lazy", "dog" ]; var other = arr1.push(...arr2);

Run results for: Array concat vs spread operator vs push with two arrays

Compare the new ES6 spread operator with the traditional concat() method and push

Array.prototype.concat

spread operator twice

Push