Run results for: ForEach vs Map for creating new array with concat

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Safari/605.1.15

Browser: Safari 12

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
ForEach	26978.6 Ops/sec
Map	59789.6 Ops/sec

Script Preparation code:

   var arr = [];
   for (var i = 0; i < 1000; i++) {
       arr[i] = i;
   }

   var arr2 = [];
   for (var i = 0; i < 1000; i++) {
       arr2[i] = i;
   }

Tests:

ForEach
let result = []; arr.forEach(num => result.push({num: num})) arr2.forEach(num => result.push({num: num}))
Map
let result = arr.map(num => {num: num}).concat(arr2.map(num => {num: num}))