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Run results for:
Array.prototype.concat vs spread operator on small array
Compare the new ES6 spread operator with the traditional concat() method on small array
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<iframe src="https://measurethat.net/Embed?id=485785" 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/118.0.0.0 Safari/537.36 OPR/104.0.0.0
Browser:
Opera 104
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Array.prototype.concat
8.7M/s
spread operator
3.5M/s
View exact numbers
Test name
Executions per second
✓
Array.prototype.concat
8,725,595 Ops/sec
spread operator
3,515,280 Ops/sec
Script Preparation code:
var array = new Array(10).fill(1) var toConcat = new Array(10).fill(2)
Tests:
Array.prototype.concat
var other = array.concat(toConcat);
spread operator
var other = [ ...array, ...toConcat ]