Benchmark: Lodash vs Object.assign

HTML Preparation code:

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

Script Preparation code:

function isObject(item) {
  return (item && typeof item === 'object' && !Array.isArray(item));
}

function mergeDeep(target, ...sources) {
  if (!sources.length) return target;
  const source = sources.shift();

  if (isObject(target) && isObject(source)) {
    for (const key in source) {
      if (isObject(source[key])) {
        if (!target[key]) Object.assign(target, { [key]: {} });
        mergeDeep(target[key], source[key]);
      } else {
        Object.assign(target, { [key]: source[key] });
      }
    }
  }
  return mergeDeep(target, ...sources);
}

Tests:

Lodash
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = _.merge(a, b);
mergeDeep using object.assign
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = mergeDeep(a, b);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
mergeDeep using object.assign

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash	3666811.0 Ops/sec
mergeDeep using object.assign	1458629.0 Ops/sec

Lodash vs Object.assign (version: 0)

Testing the performance of different approach

Comparing performance of: Lodash vs mergeDeep using object.assign

Created: 2 years ago by: Guest

Jump to the latest result

Lodash

mergeDeep using object.assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A