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Run results for:
Array.prototype.concat vs spread operator
Compare the new ES6 spread operator with the traditional concat() method
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=615363" 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/139.0.0.0 Safari/537.36
Browser:
Chrome 139
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
slice
96.7M/s
spread operator
61.1M/s
concat into empty array
56.2M/s
View exact numbers
Test name
Executions per second
✓
slice
96,738,744 Ops/sec
spread operator
61,075,756 Ops/sec
concat into empty array
56,173,788 Ops/sec
Script Preparation code:
var myArray = [ "hello", true, 7 ]
Tests:
slice
var other = myArray.slice();
spread operator
var other = [ ...myArray ]
concat into empty array
[].concat(myArray);