Benchmark: lodash flatten vs reduce array

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

myList = [];

for (let i = 0; i < 100; i++) {
  const arr = [];
  for (var n = 0; n < 100; n++) {
    arr.push({ ['key' + n]: n });
  }
  myList.push(arr)
}

Tests:

flatten
_.flatten(myList)
reduce
myList.reduce((acc, item) => { return [...acc, ...item]; }, [])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
flatten
reduce

Fastest: N/A

Slowest: N/A

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Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Linux

View result in a separate tab

Test name	Executions per second
flatten	27875.1 Ops/sec
reduce	1875.8 Ops/sec

lodash flatten vs reduce array (version: 0)

Comparing performance of: flatten vs reduce

Created: 3 years ago by: Guest

Jump to the latest result

flatten

reduce

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A