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Run results for:
Array concat vs spread operator vs push (forEach) vs aivanov
Compare the new ES6 spread operator with the traditional concat() method and push
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<iframe src="https://measurethat.net/Embed?id=523856" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Browser:
Chrome 124
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Array.prototype.concat
440.8 Ops/sec
spread operator
242.1 Ops/sec
Push
237.5 Ops/sec
Tests:
Array.prototype.concat
var params1 = new Array(100_000).fill('a'); var params2 = new Array(100_000).fill('b'); var other = params1.concat(params2);
spread operator
var params1 = new Array(100_000).fill('a'); var params2 = new Array(100_000).fill('b'); var other = [...params1, ...params2 ]
Push
var params1 = new Array(100_000).fill('a'); var params2 = new Array(100_000).fill('b'); params2.forEach((item) => { params1.push(item); });