Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
Run results for:
reduce.concat() vs flat() vs concat()
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=554759" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0
Browser:
Firefox 121
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
concat using decomposition
8.1M/s
Array.prototype.flat
7.1M/s
reduce + Array.prototype.concat
6.7M/s
View exact numbers
Test name
Executions per second
✓
concat using decomposition
8,081,123 Ops/sec
Array.prototype.flat
7,053,394 Ops/sec
reduce + Array.prototype.concat
6,670,222 Ops/sec
Tests:
reduce + Array.prototype.concat
var params = [[ 1, 2 ], [ "hello", true, 7 ]]; var other = params.reduce((acc, val) => acc.concat(val), []);
Array.prototype.flat
var params = [[1, 2, params], [ "hello", true, 7 ]]; var other = params.flat();
concat using decomposition
var params = [[ 1, 2 ], [ "hello", true, 7 ]]; var other = [].concat(...params);