Run results for: Lodash.js vs Javascript (meanBy) 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

whileMeanBy

563/s

forLoopMeanBy

543/s

forOfMeanBy

164/s

forEachMeanBy

153/s

Lodash

135/s

Native

114/s

View exact numbers

Test name	Executions per second
✓ whileMeanBy	563 Ops/sec
forLoopMeanBy	543 Ops/sec
forOfMeanBy	164 Ops/sec
forEachMeanBy	153 Ops/sec
Lodash	135 Ops/sec
Native	114 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

const data = Array.from({ length: 1_000_000 }, (_, i) => ({ value: i % 100 }));

function nativeMeanBy(array, key) {
  const sum = array.reduce((acc, obj) => acc + obj[key], 0);
  return sum / array.length;
}

function lodashMeanBy(array, key) {
  return _.meanBy(array, key);
}

function forLoopMeanBy(array, key) {
  let sum = 0;
  for (let i = 0; i < array.length; i++) {
    sum += array[i][key];
  }
  return sum / array.length;
}

function forOfMeanBy(array, key) {
  let sum = 0;
  for (const obj of array) {
    sum += obj[key];
  }
  return sum / array.length;
}

function whileMeanBy(array, key) {
  let sum = 0;
  let i = 0;
  const len = array.length;
  while (i < len) {
    sum += array[i++][key];
  }
  return sum / len;
}

function forEachMeanBy(array, key) {
  let sum = 0;
  array.forEach(obj => sum += obj[key]);
  return sum / array.length;
}

Tests:

Native
nativeMeanBy(data, 'value')
Lodash
lodashMeanBy(data, 'value')
forLoopMeanBy
forLoopMeanBy(data, 'value')
forOfMeanBy
forOfMeanBy(data, 'value')
whileMeanBy
whileMeanBy(data, 'value')
forEachMeanBy
forEachMeanBy(data, 'value')