Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
Run results for:
Javascript: Array concat vs spread operator vs push speed test
Compare the new ES6 spread operator with the traditional concat() method and push. (by j3)
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=505742" 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/121.0.0.0 Safari/537.36
Browser:
Chrome 121
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Push
46.2M/s
Array.prototype.concat
7.5M/s
spread operator
4.7M/s
View exact numbers
Test name
Executions per second
✓
Push
46,214,908 Ops/sec
Array.prototype.concat
7,483,617 Ops/sec
spread operator
4,666,449 Ops/sec
Tests:
Array.prototype.concat
var newValue = { foo: 'baz', bar: 'biz' }; var existingArray = []; var i = 0; while(i++ < 10) { existingArray.concat([newValue]); };
spread operator
var newValue = { foo: 'baz', bar: 'biz' }; var existingArray = []; var i = 0; while(i++ < 10) { existingArray = [...existingArray, newValue]; };
Push
var newValue = { foo: 'baz', bar: 'biz' }; var existingArray = []; var i = 0; while(i++ < 10) { existingArray.push(newValue); };