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Run results for:
Array.prototype.slice vs spread operator performance
Compare the new ES6 spread operator with the traditional slice() method
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<iframe src="https://measurethat.net/Embed?id=586003" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Array.prototype.slice
61.4M/s
spread operator
34.8M/s
View exact numbers
Test name
Executions per second
✓
Array.prototype.slice
61,431,216 Ops/sec
spread operator
34,817,228 Ops/sec
Script Preparation code:
var arr = ["hatsune miku", true, 39];
Tests:
Array.prototype.slice
var other = arr.slice();
spread operator
var other = [...arr];