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Run results for:
Array slice() vs slice(0) vs spread operator
Compare the new ES6 spread operator with the traditional slice() methods
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<iframe src="https://measurethat.net/Embed?id=582276" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_7_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.8.1 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 17
Operating system:
iOS 17.7.2
Device Platform:
Mobile
Date tested:
one year ago
Array.prototype.slice()
25.8M/s
Array.prototype.slice(0)
22.8M/s
spread operator
12.8M/s
View exact numbers
Test name
Executions per second
✓
Array.prototype.slice()
25,789,062 Ops/sec
Array.prototype.slice(0)
22,751,082 Ops/sec
spread operator
12,845,253 Ops/sec
Script Preparation code:
var baseArray = [] for (var i = 0; i < 50; i++) { baseArray.push((Math.floor(Math.random() * Math.floor(1000000))).toString(16)) }
Tests:
Array.prototype.slice()
var other = baseArray.slice();
spread operator
var other = [ ...baseArray ]
Array.prototype.slice(0)
var other = baseArray.slice(0);