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Run results for:
Array concat vs spread operator vs push with large arrays
Compare the new ES6 spread operator with the traditional concat() method and push
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<iframe src="https://measurethat.net/Embed?id=493802" 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/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Array.prototype.concat
455.5 Ops/sec
spread operator
265.0 Ops/sec
Push
319.8 Ops/sec
Tests:
Array.prototype.concat
let a = new Array(500000).fill(0); let b = new Array(10000).fill(0); var other = a.concat(b);
spread operator
let a = new Array(500000).fill(0); let b = new Array(10000).fill(0); var other = [ ...a, ...b ]
Push
let a = new Array(500000).fill(0); let b = new Array(10000).fill(0); var other = a.push(...b);