Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
reduce.concat() vs flat() vs concat + spread vs reduce + spread
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=491577" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0
Browser:
Firefox 120
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
reduce + Array.prototype.concat
4461913.5 Ops/sec
Array.prototype.flat
10206684.0 Ops/sec
concat + spread
9675254.0 Ops/sec
reduce + spread
4576657.0 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 ], [ "hello", true, 7 ]]; var other = params.flat();
concat + spread
var params = [[ 1, 2 ], [ "hello", true, 7 ]]; var other = [].concat(...params);
reduce + spread
var params = [[ 1, 2 ], [ "hello", true, 7 ]]; var other = params.reduce((acc, val) => { acc.push(...val); return acc; }, []);