Benchmark: Lodash pick vs native pick vs compiled fn pick

HTML Preparation code:

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

Script Preparation code:

function pick1(obj, keys) {

  var res = {};
  if (typeof keys === 'string') {
    if (keys in obj) {
      res[keys] = obj[keys];
    }
    return res;
  }

  var len = keys.length;
  var idx = -1;

  while (++idx < len) {
    var key = keys[idx];
    if (key in obj) {
      res[key] = obj[key];
    }
  }
  return res;
};

var pick2 = new Function('el', 'if (!el) return {}; const res = {}; ' + 
                         'if ("a" in el) res.a = el.a;' + 
                         'if ("d" in el) res.d = el.d;' + 
                         'if ("i" in el) res.i = el.i;' + 
                         ' return res;')


function getRandomInt(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min) + min); //The maximum is exclusive and the minimum is inclusive
}


var data = [];

for (let i = 0; i < 10000; i++) {
    const obj = {};
	const propsCount = getRandomInt(0, 10);
  
  	for (let j = 0; j < propsCount; j++) {
		
	 	const propCode = getRandomInt(97, 122);
      
  		obj[String.fromCharCode(propCode)] = propCode;
	}
  
    data.push(obj);
}

Tests:

Lodash
data.map((obj) => _.pick(obj, ['a','d','i']))
native pick
data.map((obj) => pick1(obj, ['a','d','i']))
compiled function
data.map((obj) => pick2(obj, ['a','d','i']))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
native pick
compiled function

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Windows

View result in a separate tab

Test name	Executions per second
Lodash	106.9 Ops/sec
native pick	802.7 Ops/sec
compiled function	665.8 Ops/sec

Lodash pick vs native pick vs compiled fn pick (version: 0)

Comparing performance of: Lodash vs native pick vs compiled function

Created: 2 years ago by: Guest

Jump to the latest result

Lodash

native pick

compiled function

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A