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Run results for:
Array concat vs spread operator vs push (forEach)
Compare the new ES6 spread operator with the traditional concat() method and push
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<iframe src="https://measurethat.net/Embed?id=617492" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 26
Operating system:
iOS 18.6
Device Platform:
Mobile
Date tested:
10 months ago
spread operator
824.9M/s
Array.prototype.concat
42.2M/s
Push
16.3M/s
View exact numbers
Test name
Executions per second
✓
spread operator
824,907,456 Ops/sec
Array.prototype.concat
42,221,568 Ops/sec
Push
16,345,419 Ops/sec
Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ]; other.forEach((item) => { other.push(item); });