Run results for: underscore js

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 124

Operating system: Android

Device Platform: Mobile

Date tested: 4 months ago

Test name	Executions per second
underscore	613.6 Ops/sec
native js	522.2 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.13.0/underscore.js"></script>

Script Preparation code:

  var data = _.range(10000).map(function(i) {
    return {
      counter: i
    }
  });
  
  function isOdd(num) {
    return num % 2 === 1;
  }
  
  function square(num) {
    return num * num;
  }
  
  function lessThanThreeDigits(num) {
    return num.toString().length < 3;
  }

Tests:

underscore
var result = _.chain(data) .map(item => item.counter) .filter(isOdd) .map(square) .filter(lessThanThreeDigits) .value();
native js
var result = data.map(item => item.counter) .filter(isOdd) .map(square) .filter(lessThanThreeDigits)

Run results for: underscore js

native vs underscore

underscore

native js