Run results for: .filter().map() vs .reduce test

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

.reduce()

31K/s

.map().filter()

20K/s

View exact numbers

Test name	Executions per second
✓ .reduce()	31,044 Ops/sec
.map().filter()	20,117 Ops/sec

Script Preparation code:

var array = [];
for (var i = 0; i < 10000; i++) {
  array[i] = i;
}

var firstTestResults = [];
var secondTestResults = [];

Tests:

.map().filter()
firstTestResults = array .filter(value => { return (value + 10) % 2 === 0; }) .map(value => { return value + 10; });
.reduce()
secondTestResults = array.reduce((acc, value) => { value = value + 10; if (value % 2 === 0) { acc.push(value); } return acc; }, []);