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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=593737" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Browser:
Chrome 134
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Array.prototype.concat
16.1M/s
spread operator
8.6M/s
View exact numbers
Test name
Executions per second
✓
Array.prototype.concat
16,115,168 Ops/sec
spread operator
8,607,541 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 ];