Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
Run results for:
Array.prototype.concat vs spread operator vs flat
Compare the new ES6 spread operator with the traditional concat() method
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=489997" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Mobile Safari/537.36
Browser:
Chrome Mobile 120
Operating system:
Android
Device Platform:
Mobile
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
spread operator
66.6M/s
Array.prototype.concat
12.0M/s
Array.prototype.flat
2.8M/s
View exact numbers
Test name
Executions per second
✓
spread operator
66,552,308 Ops/sec
Array.prototype.concat
11,972,350 Ops/sec
Array.prototype.flat
2,757,642 Ops/sec
Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Array.prototype.flat
var params = [ "hello", true, 7 ]; var other = [1, 2, params].flat()