Run results for: reduce.concat() vs flat()

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/119.0.6045.169 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 119

Operating system: iOS 17.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
reduce + Array.prototype.concat	15953080.0 Ops/sec
Array.prototype.flat	7261798.5 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();

Run results for: reduce.concat() vs flat()

Compare the new ES6 spread operator with the traditional concat() method

reduce + Array.prototype.concat

Array.prototype.flat