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Run results for: lodash merge vs object.assign vs spread (v3)

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Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36
Chrome 90
Linux
Desktop
3 years ago
Test name Executions per second
lodash merge 367361.0 Ops/sec
object.assign 4670935.0 Ops/sec
spread 1646190.8 Ops/sec
json deep clone 450785.7 Ops/sec
HTML Preparation code:
​x
 
1
​
2
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Tests:

  • lodash merge

     
    var defaultOptions = {
      headers: {
        'content-type': 'application/json',
        'user-agent': 'super-app',
      }
    };
    var options = { headers: {'content-type': 'application/xml' }, data: { 'key': 'value' } };
    var result = _.merge(defaultOptions, options);

  • object.assign

     
    var defaultOptions = {
      headers: {
        'content-type': 'application/json',
        'user-agent': 'super-app',
      }
    };
    var options = { headers: { 'content-type': 'application/xml' }, data: { 'key': 'value' } };
    var result = Object.assign(defaultOptions, options);

  • spread

     
    var defaultOptions = {
      headers: {
        'content-type': 'application/json',
        'user-agent': 'super-app',
      }
    };
    var options = { headers: { 'content-type': 'application/xml' }, data: { 'key': 'value' } };
    var result = { ...defaultOptions, ...options };

  • json deep clone

     
    var defaultOptions = {
      headers: {
        'content-type': 'application/json',
        'user-agent': 'super-app',
      }
    };
    var options = { headers: { 'content-type': 'application/xml' }, data: { 'key': 'value' } };
    var clonedOptions = JSON.parse(JSON.stringify(options));
    var result = Object.assign(defaultOptions, clonedOptions);