Run results for: Lodash reduce filter vs Native reduce filter vs Lodash filter vs Native filter

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36

Browser: Chrome 91

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Reduce filter	5715686.0 Ops/sec
Lodash reduce filter	2941017.8 Ops/sec
Native filter	5439579.5 Ops/sec
Lodash filter	2973869.0 Ops/sec
Reduce modify	5533605.0 Ops/sec
Map modify	5721916.0 Ops/sec

HTML Preparation code:

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

Script Preparation code:

var testCopy = null;
var testArray = [{
  id: 1,
  description: 'Random description.',
  testDate: new Date(),
  testBoolean: true,
  testObject: {
    testString: 'test string',
    testNumber: 12345
  },
  testArray: [{
    myName: 'test name',
    myNumber: 123245
  }]
},{
  id: 2,
  description: 'Random description.',
  testNumber: 123456789,
  testBoolean: true,
  testObject: {
    testString: 'test string',
    testNumber: 12345
  },
  testArray: [{
    myName: 'test name',
    myNumber: 123245
  }]
}];

Tests:

Reduce filter
testCopy = testArray.reduce((accumulator, currentValue) => { if(currentValue.id != 2) { currentValue.description = 'test'; accumulator.push(currentValue); return accumulator; } return accumulator; },[])
Lodash reduce filter
testCopy = _.reduce(testArray,(accumulator, currentValue) => { if(currentValue.id != 2) { currentValue.description = 'test'; accumulator.push(currentValue); return accumulator; } return accumulator; },[]);
Native filter
testCopy = testArray.filter(o => { if(o.id != 2) { o.description = 'test'; return o; } });
Lodash filter
testCopy = _.filter(testArray, function(o) { if(o.id != 2) { o.description = 'test'; return o; } });
Reduce modify
testCopy = testArray.reduce((accumulator, currentValue) => { if(currentValue.id == 2) { currentValue.description = 'test'; accumulator.push(currentValue); return accumulator; } return accumulator; },[])
Map modify
testCopy = testArray.map((item)=>{ if(item.id == 2){ item.description = 'test'; } return item; });

Run results for: Lodash reduce filter vs Native reduce filter vs Lodash filter vs Native filter

compare filter methods on arrays that both modify objects and remove items from the array.

Reduce filter

Lodash reduce filter

Native filter

Lodash filter

Reduce modify

Map modify