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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=565602" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3.1 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
spread operator
669.4M/s
Array.prototype.concat
58.8M/s
Push
21.8M/s
View exact numbers
Test name
Executions per second
✓
spread operator
669,430,592 Ops/sec
Array.prototype.concat
58,844,016 Ops/sec
Push
21,813,518 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); });