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Run results for:
reduce.concat() vs flat() vs concat + spread vs reduce + spread
Compare the new ES6 spread operator with the traditional concat() method
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<iframe src="https://measurethat.net/Embed?id=620911" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Mobile Safari/537.36 EdgA/142.0.0.0
Browser:
Chrome Mobile 142
Operating system:
Android
Device Platform:
Mobile
Date tested:
5 months ago
Test name
Executions per second
reduce + Array.prototype.concat
5964733.5 Ops/sec
Array.prototype.flat
3442351.8 Ops/sec
concat + spread
6375704.5 Ops/sec
reduce + spread
11974121.0 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; }, []);