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Run results for:
Array.prototype.concat vs spread operator on NodeList
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=537990" 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/127.0.0.0 Safari/537.36
Browser:
Chrome 127
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
push apply into empty array
1.9M/s
spread operator
676K/s
slice
643K/s
Array.from
545K/s
Object.values
164K/s
View exact numbers
Test name
Executions per second
✓
push apply into empty array
1,877,254 Ops/sec
spread operator
675,571 Ops/sec
slice
642,535 Ops/sec
Array.from
545,401 Ops/sec
Object.values
163,515 Ops/sec
Script Preparation code:
var dom = document.body.querySelectorAll('*')
Tests:
slice
var other = Array.prototype.slice.call(dom);
spread operator
var other = [ ...dom ]
push apply into empty array
var other = []; [].push.apply(other, dom)
Array.from
var other = Array.from(dom);
Object.values
var other = Object.values(dom)