Run results for: Underscore clone vs Underscore pick

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

underscore clone

2.0M/s

underscore pick

910K/s

View exact numbers

Test name	Executions per second
✓ underscore clone	1,979,910 Ops/sec
underscore pick	909,520 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js'></script>

Script Preparation code:

var MyObject = [{dateOfBirth_dateOfBirth: "babyBoomers", headcount: 644},{dateOfBirth_dateOfBirth: "genX", headcount: 605},{dateOfBirth_dateOfBirth: "millennial", headcount: 805}];

var myCopy = [];

Tests:

underscore clone
_.each(MyObject, function(d) { myCopy.push(_.clone(d)); });
underscore pick
_.each(MyObject, function(d) { myCopy.push(_.pick(d,['dateOfBirth_dateOfBirth','headcount'])); });