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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
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<iframe src="https://measurethat.net/Embed?id=517873" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Browser:
Chrome 123
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Array.prototype.concat
9130439.0 Ops/sec
spread operator twice
25110960.0 Ops/sec
Push
32211366.0 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);