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Run results for:
concat vs push vs spread performance
Compare the new ES6 spread operator with the traditional concat() method and push
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<iframe src="https://measurethat.net/Embed?id=502093" 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/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Concat
9372518.0 Ops/sec
Spread operator
29255606.0 Ops/sec
Push
53624148.0 Ops/sec
Tests:
Concat
var a = [ "hello", true, 7 ]; var b = [ 1, 2 ]; var c = a.concat(b);
Spread operator
var a = [ "hello", true, 7 ]; var b = [ 1, 2 ]; var c = [ ...a, ...b ]
Push
var a = [ "hello", true, 7 ]; var b = [ 1, 2 ]; var c = a.push(...b);