Run results for: Lodash Custom Merge

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

13.9M/s

Lodash

13.6M/s

View exact numbers

Test name	Executions per second
✓ Me	13,933,069 Ops/sec
Lodash	13,564,371 Ops/sec

HTML Preparation code:

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

Script Preparation code:

function themeMerge(target, source) {
  function isObject(item) {
    return item && typeof item === 'object' && !Array.isArray(item)
  }

  let output = Object.assign({}, target)
  if (isObject(target) && isObject(source)) {
    Object.keys(source).forEach(key => {
      if (isObject(source[key])) {
        if (!(key in target)) Object.assign(output, { [key]: source[key] })
        else output[key] = themeMerge(target[key], source[key])
      } else {
        Object.assign(output, { [key]: source[key] })
      }
    })
  }
  return output
}

Tests:

Lodash
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = _.merge(a, b);
Me
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = themeMerge(a, b);