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Run results for:
Array.prototype.concat vs spread operator vs flat2
Compare the new ES6 spread operator with the traditional concat() method
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<iframe src="https://measurethat.net/Embed?id=487257" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Mobile Safari/537.36
Browser:
Chrome Mobile 119
Operating system:
Android
Device Platform:
Mobile
Date tested:
2 years ago
spread operator
23.9M/s
Array.prototype.concat
6.0M/s
Array.prototype.flat
1.1M/s
View exact numbers
Test name
Executions per second
✓
spread operator
23,887,200 Ops/sec
Array.prototype.concat
6,041,433 Ops/sec
Array.prototype.flat
1,143,756 Ops/sec
Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var params2 = [ "hello", true, 7 ]; var other = params.concat(params2);
spread operator
var params = [ "hello", true, 7 ]; var params2 = [ "hello", true, 7 ]; var other = [ ...params, ...params2 ]
Array.prototype.flat
var params = [ "hello", true, 7 ]; var params2 = [ "hello", true, 7 ]; var other = [params, params2].flat()