Run results for: lodash some vs loop

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 11_2_2 like Mac OS X) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0 Mobile/15C202 Safari/604.1

Browser: Mobile Safari 11

Operating system: iOS 11.2.2

Device Platform: Mobile

Date tested: 6 years ago

Test name	Executions per second
use for loop	259.6 Ops/sec
use lodash some	3.8 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.16.2/lodash.min.js"></script>

Script Preparation code:

var sample = [1000, 1234, 1222, 3444, 1, 89, 100, 1200, 88888, 99999, 2000000];
var testArray = [];

for (var i = 1000000; i > 0; i--){
	if(i % 3 === 0){
      sample.push[i]
    }
}

for (var i = 0; i < 1000000; i ++)
{
  testArray[i] = i;
}

function contains(list, item) {
  if (item && (list && list.length)) {
    for (var i = 0; i < list.length; i++) {
      var contains = item === list[i];
      if (contains) {
        return contains;
      }
    }
  }
  return false;
}

Tests:

use for loop
for (var i = 0; i < sample.length; i++) { contains(testArray, sample[i]) }
use lodash some
for (var i = 0; i < sample.length; i++) { _.some(testArray, function(testVal){ return testVal === sample[i]; }); }

Run results for: lodash some vs loop

use for loop

use lodash some