Run results for: {} vs new Object() vs Object.null (Assignment)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

new Object()

9K/s

Object.create(null)

9K/s

{}

9K/s

View exact numbers

Test name	Executions per second
✓ new Object()	9,368 Ops/sec
Object.create(null)	9,362 Ops/sec
{}	8,901 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const SIZE = 1000;
const _floor = Math.floor;
const _random = Math.random;
const _chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_$';
function getInt(a=0,b=0x100000000){ return _floor(_random() * (b - a)) + a; }
function getStr(n=8){ let str=''; let i; for(i=0;i<n;i++) str+=_chars[getInt(0,64)]; return str }

const _keys = [];
const _values = [];

(()=>{
  let i;
  for(i=0;i<SIZE;i++)
  {
    _keys[i] = getStr(16);
    _values[i] = getInt();
  }
 })();

Tests:

{}
const obj = {}; for(i=0;i<SIZE;i++) obj[_keys[i]] = _values[i];
new Object()
const obj = new Object() for(i=0;i<SIZE;i++) obj[_keys[i]] = _values[i];
Object.create(null)
const obj = Object.create(null); for(i=0;i<SIZE;i++) obj[_keys[i]] = _values[i];