Benchmark: Lodash.js vs Javascript (meanBy) 2

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')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native
Lodash
forLoopMeanBy
forOfMeanBy
whileMeanBy
forEachMeanBy

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

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/OS: Chrome 136 on Windows

View result in a separate tab

forOfMeanBy

679/s

whileMeanBy

584/s

forLoopMeanBy

581/s

forEachMeanBy

261/s

Native

114/s

Lodash

93/s

View exact numbers

Test name	Executions per second
✓ forOfMeanBy	679 Ops/sec
whileMeanBy	584 Ops/sec
forLoopMeanBy	581 Ops/sec
forEachMeanBy	261 Ops/sec
Native	114 Ops/sec
Lodash	93 Ops/sec

Lodash.js vs Javascript (meanBy) 2 (version: 1)

Comparing performance of: `Native vs Lodash vs forLoopMeanBy vs forOfMeanBy vs whileMeanBy vs forEachMeanBy`

Created: one year ago by: Guest

Go to the latest result

Native

Lodash

forLoopMeanBy

forOfMeanBy

whileMeanBy

forEachMeanBy

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Lodash.js vs Javascript (meanBy) 2 (version: 1)

Comparing performance of: Native vs Lodash vs forLoopMeanBy vs forOfMeanBy vs whileMeanBy vs forEachMeanBy

Created: one year ago by: Guest

Go to the latest result

Native

Lodash

forLoopMeanBy

forOfMeanBy

whileMeanBy

forEachMeanBy

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Native vs Lodash vs forLoopMeanBy vs forOfMeanBy vs whileMeanBy vs forEachMeanBy`