Run results for: lodash - reduce vs forEach with large array to object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser: Chrome 107

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
reduce	1.4 Ops/sec
forEach	1.7 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

AخA
 
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var arr = [];
for (var i = 0; i < 1000000; i++) {
  arr.push(i);
}

 
var arr = [];for (var i = 0; i < 1000000; i++) {  arr.push(i);}

Tests:

reduce

var results = _.reduce(arr, (results, result) => {
  let key = `a_${result}_b_${result}_c`;
  results[key] = results[key] || key;
  return results;
});

 
var results = _.reduce(arr, (results, result) => {  let key = `a_${result}_b_${result}_c`;  results[key] = results[key] || key;  return results;});

forEach

var results = {};
_.each(arr, (result) => {
  let key = `a_${result}_b_${result}_c`;
  results[key] = results[key] || key;
});

 
var results = {};_.each(arr, (result) => {  let key = `a_${result}_b_${result}_c`;  results[key] = results[key] || key;});