Run results for: reduce concat vs apply concat

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Browser: Firefox 87

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
reduce concat	3077993.0 Ops/sec
concat.apply	5982277.0 Ops/sec

Script Preparation code:

var params = [[ 1, 2 ], [ "hello", true, 7 ], {Code: "3", Message: "Какая-то ошибка"},{Code: "2", Message: "Какая-то ошибка"}, [{Code: "1212121212", Message: "то ошибкато ошиб"}]];

Tests:

reduce concat
var other = params.reduce(function(previousValue, currentValue) { return previousValue.concat(currentValue) }, []);
concat.apply
var other = params.concat.apply([], this);

Run results for: reduce concat vs apply concat

Array flat es5 syntax (reduce concat vs apply concat)

reduce concat

concat.apply