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Run results for: Array.prototype.concat vs spread operator vs lodash.concat - variable and constant

Compare the new ES6 spread operator with the traditional concat() method and with the favourite _.concat() method, when an array from a variable is concatenated with an array literal.

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Safari/605.1.15
Safari 14
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
Array.prototype.concat 6335179.5 Ops/sec
spread operator 7512070.5 Ops/sec
lodash concat 1402248.8 Ops/sec
HTML Preparation code:
AخA
 
1
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>
Script Preparation code:
 
var params = [ "hello", true, 7 ];
Tests:

  • Array.prototype.concat

     
    var result = [ 1, 2 ].concat(params);

  • spread operator

     
    var result = [ 1, 2, ...params ]

  • lodash concat

     
    var result = _.concat([ 1, 2 ], params);