Run results for: Js array chunk 2

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.80 Safari/537.36

Browser: Chrome 75

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
1	2312479.0 Ops/sec
2	2309348.0 Ops/sec
3	4633515.0 Ops/sec
4	278866.8 Ops/sec
5	449476.7 Ops/sec

Script Preparation code:

function chunk1(array, size) {
  let chunked = [];

  for (let ele of array) {
    const last = chunked[chunked.length - 1];

    if (!last || last.length === size) {
      chunked.push([ele])
    } else {
      last.push(ele)
    }
  }
  
  return chunked
}

function chunk2(array, size) {
  let chunked = [];

  array.forEach(element => {
    const last = chunked[chunked.length - 1];
    if (!last || last.length === size) {
      chunked.push([element])
    } else {
      last.push(element)
    }
  });
  
  return chunked
}

function chunk3(arr, n) {
  let chunked = arr.reduce((chunk, val) => {

    if (chunk[chunk.length - 1].length === n)
      chunk.push([]);

    chunk[chunk.length - 1].push(val);

    return chunk;
  }, [
    []
  ]);

  return chunked
}

function chunk4 ([...arr], n) {
  return [...Array(Math.ceil(arr.length) / n)].map(_ => arr.splice(0, n));
}

function chunk5([...array], size) {
  let chunked = []

  while(array.length > 0) {
    chunked.push(array.splice(0, size))
  }
  
  return chunked
}

Tests:

1
chunk1([1, 2, 3, 4], 2);
2
chunk2([1, 2, 3, 4], 2);
3
chunk3([1, 2, 3, 4], 2);
4
chunk4([1, 2, 3, 4], 2);
5
chunk5([1, 2, 3, 4], 2);