Run results for: unique string

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36

Browser: Chrome 56

Operating system: Mac OS X 10.12.3

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
object	135.6 Ops/sec
class list	0.2 Ops/sec

Script Preparation code:


var a = [];
for (var ai = 0; ai < 10e3; ai++) {
  a.push(String(Math.random()));
}

var o = {};
var e = document.createElement('span');
var l = e.classList;

Tests:

object
for (var oi = 0; oi < a.length; oi++) { o[a[oi]] = true; } var oResult = Object.keys(o); o = {};
class list
for (var li = 0; li < a.length; li++) { l.add([a[li]]); } var oResult = Array.prototype.slice(l); e.className = '';

Run results for: unique string

get an array of strings and return a new array that is a copy of the original without duplicates

object

class list