Benchmark: reduce vs map vs for

HTML Preparation code:

<script src="//raw.githubusercontent.com/lodash/lodash/4.17.15-npm/lodash.min.js"></script>

Script Preparation code:

var fieldsMap = {
      'array[0].sarray[0]': 'array[1].sarray[1]',
      'array[0].sarray[1].ssarray[0].sssarray[0]': 'array[1].sarray[3].ssarray[0].sssarray[1]',
      'array[0].sarray[1].ssarray[1].sssarray[0]': 'array[1].sarray[3].ssarray[1].sssarray[1]',
      'array[0].sarray[1].ssarray[2].sssarray[0]': 'array[1].sarray[3].ssarray[2].sssarray[1]',
      'array[0].sarray[1].ssarray[3].sssarray[0]': 'array[1].sarray[3].ssarray[3].sssarray[1]',
      'array[0].sarray[1].ssarray[4].sssarray[0]': 'array[1].sarray[3].ssarray[4].sssarray[1]',
      'array[0].sarray[1].ssarray[5].sssarray[0]': 'array[1].sarray[3].ssarray[5].sssarray[1]',
      'array[0].sarray[1].ssarray[6].sssarray[0]': 'array[1].sarray[3].ssarray[6].sssarray[1]',
      'array[0].sarray[1].ssarray[7].sssarray[0]': 'array[1].sarray[3].ssarray[7].sssarray[1]',
      'array[0].sarray[1].ssarray[8].sssarray[0]': 'array[1].sarray[3].ssarray[8].sssarray[1]',
      'array[0].sarray[1].ssarray[9].sssarray[0]': 'array[1].sarray[3].ssarray[9].sssarray[1]',
      'array[0].sarray[1].ssarray[10].sssarray[0]': 'array[1].sarray[3].ssarray[10].sssarray[1]',
      'array[0].sarray[1].ssarray[11].sssarray[0]': 'array[1].sarray[3].ssarray[12].sssarray[1]',
      'array[0].sarray[1].ssarray[12].sssarray[0]': 'array[1].sarray[3].ssarray[13].sssarray[1]',
      'array[0].sarray[1].ssarray[13].sssarray[0]': 'array[1].sarray[3].ssarray[14].sssarray[1]',
      'array[0].sarray[1].ssarray[14].sssarray[0]': 'array[1].sarray[3].ssarray[15].sssarray[1]',
      'array[0].sarray[1].ssarray[15].sssarray[0]': 'array[1].sarray[3].ssarray[16].sssarray[1]'
}

Tests:

reduce
var prepareMap = _.reduce( fieldsMap, function(result, value, key) { result.push({ from: key, to: value }); return result; }, [] );
map
var prepareMap = _.map(fieldsMap, function(value, key) { return { from: key, to: value } });
light
var prepareMap = [] var i = -1, props = [], length, key; for (key in fieldsMap) { props.push(key); } length = props.length; while (length--) { var key = props[++i]; prepareMap[i] = { from: key, to: fieldsMap[key] }; }
map2
var prepareMap = _.map(fieldsMap, function(value, key) { return { from: key, to: value } });
light 2
var prepareMap = [] var i = -1, props = [], length = 0; for (var key in fieldsMap) { props.push(key); ++length; } while (length--) { var key = props[++i]; prepareMap[i] = { from: key, to: fieldsMap[key] }; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
reduce
map
light
map2
light 2

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36

Browser/OS: Chrome 81 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
reduce	838099.6 Ops/sec
map	845963.9 Ops/sec
light	521735.7 Ops/sec
map2	869706.3 Ops/sec
light 2	512420.4 Ops/sec

reduce vs map vs for (version: 0)

Comparing performance of: reduce vs map vs light vs map2 vs light 2

Created: 4 years ago by: Guest

Jump to the latest result

reduce

map

light

map2

light 2

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A