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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Browser: Chrome 142

Operating system: Windows

Device Platform: Desktop

Date tested: 8 months ago

Object.create(null)

33K/s

new Object()

33K/s

{}

32K/s

View exact numbers

Test name	Executions per second
✓ Object.create(null)	32,845 Ops/sec
new Object()	32,776 Ops/sec
{}	32,469 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();
  }
 })();

const obj_1 = {};
const obj_2 = new Object();
const obj_3 = Object.create(null);

for(i=0;i<SIZE;i++)
{
  obj_1[_keys[i]] = _values[i];
  obj_2[_keys[i]] = _values[i];
  obj_3[_keys[i]] = _values[i];
}

Tests:

{}
for(i=0;i<SIZE;i++) delete obj_1[_keys[i]]
new Object()
for(i=0;i<SIZE;i++) delete obj_2[_keys[i]]
Object.create(null)
for(i=0;i<SIZE;i++) delete obj_3[_keys[i]]