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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=583911" 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/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
spread operator
23.7M/s
Array.prototype.concat
7.5M/s
View exact numbers
Test name
Executions per second
✓
spread operator
23,670,532 Ops/sec
Array.prototype.concat
7,474,950 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 ];