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Run results for:
concat 2 arrays: Array.prototype.concat vs spread operator
Compare the new ES6 spread operator with the traditional concat() method
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<iframe src="https://measurethat.net/Embed?id=587069" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:135.0) Gecko/20100101 Firefox/135.0
Browser:
Firefox 135
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Array.prototype.concat
40.0M/s
spread operator
25.6M/s
View exact numbers
Test name
Executions per second
✓
Array.prototype.concat
39,972,816 Ops/sec
spread operator
25,566,578 Ops/sec
Script Preparation code:
var a = [ 1, 2, 3 ]; var b = [ 4, 5, 6 ];
Tests:
Array.prototype.concat
var result = a.concat(b);
spread operator
var result = [ ...a, ...b ];