Run results for: lodash test

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

Browser: Chrome 58

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
map + find iterate on ids	1986.9 Ops/sec
reduce + includes iterate on all	796.6 Ops/sec
filter + includes + map iterate on all	795.5 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script>

Script Preparation code:

function shuffle(a) {
    var j, x, i;
    for (i = a.length; i; i--) {
        j = Math.floor(Math.random() * i);
        x = a[i - 1];
        a[i - 1] = a[j];
        a[j] = x;
    }
}
var all = [];
var ids = [];
var allLength = 1000;
var idsLength = 5;

for(var i = 0; i < allLength; i++) {
  all[i] = {id: i, value: 'value' + i };
}

for(var i = 0; i < allLength; i++) {
  ids[i] = i;
}
ids = ids.splice(allLength - idsLength)
shuffle(all);
shuffle(ids);

Tests:

map + find iterate on ids
var output = _.map(ids, function(id) { return _.find(all, { id: id }); }); console.log(output);
reduce + includes iterate on all
var output = _.reduce(all, function(acc, element) { if(_.includes(ids, element.id)) { acc.push(element); } return acc; }, []); console.log(output);
filter + includes + map iterate on all
var output = _.filter(all, function(element) { return _.includes(ids, element.id); }); console.log(output);

Run results for: lodash test

map + find iterate on ids

reduce + includes iterate on all

filter + includes + map iterate on all