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Run results for:
Array slice() vs slice(0) vs spread operator - 5000 elements
Compare the new ES6 spread operator with the traditional slice() methods
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<iframe src="https://measurethat.net/Embed?id=522125" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Browser:
Chrome 123
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Array.prototype.slice()
2095941.6 Ops/sec
spread operator
2325990.8 Ops/sec
Array.prototype.slice(0)
2365071.8 Ops/sec
Script Preparation code:
var baseArray = [] for (var i = 0; i < 5000; 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);