Run results for: Test perfomance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Browser: Chrome 100

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Test reduce	7845.7 Ops/sec
Test 2	8703.2 Ops/sec

Script Preparation code:

var arr1 = Array(1000).fill().map(() => Math.round(Math.random() * 100));
var arr2 = Array(1000).fill().map(() => Math.round(Math.random() * 100));

AخA
 
var arr1 = Array(1000).fill().map(() => Math.round(Math.random() * 100));var arr2 = Array(1000).fill().map(() => Math.round(Math.random() * 100));

Tests:

Test reduce

const fn = (arr1, arr2) => {
  return arr2.reduce((acc, item) => {
    if (arr1.includes(item) && !acc.includes(item)) {
      acc.push(item);
    }

    return acc;
  }, []);
};

fn(arr1, arr2)

​x
 
const fn = (arr1, arr2) => {  return arr2.reduce((acc, item) => {    if (arr1.includes(item) && !acc.includes(item)) {      acc.push(item);    }​    return acc;  }, []);};​fn(arr1, arr2)

Test 2

const fn = (arr1, arr2) => {
  return Array.from(new Set(arr2.filter((item) => arr1.includes(item))));
};

fn(arr1, arr2)

 
const fn = (arr1, arr2) => {  return Array.from(new Set(arr2.filter((item) => arr1.includes(item))));};​fn(arr1, arr2)