Run results for: lodash/uniq vs filter+set vs array→set→array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 11.0.1

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
lodash/uniq	154580.6 Ops/sec
filter+set	290562.5 Ops/sec
array→set→array	325574.5 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var smalldata = [1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok'];
var bigdata = [1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok',1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok',1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok',1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok',1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok',1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok',1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok',1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok',1,2,3,4,5,'ok','abc','def',null,undefined,1,2,3,'ok'];

var uniq = (arr) => {
  var dups = new Set();
  return arr.filter((v) => {
    if (dups.has(v)) {
      return false;
    }
    dups.add(v);
    return true;
  });
};

var uniqset = (arr) => [...(new Set(arr))];

Tests:

lodash/uniq
_.uniq(smalldata); _.uniq(bigdata);
filter+set
uniq(smalldata); uniq(bigdata);
array→set→array
uniqset(smalldata); uniqset(bigdata);