Run results for: new empty object vs constant vs frozen constant 2 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Browser: Chrome 127

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
new empty	459634.9 Ops/sec
var	51248.6 Ops/sec
var frozen	51045.2 Ops/sec
fn new	208625.1 Ops/sec
fn var	46450.2 Ops/sec
fn frozen	46532.0 Ops/sec
const	491199.2 Ops/sec
new2	451122.0 Ops/sec

Script Preparation code:

var empty={};
var frozen=Object.freeze({});
var fnNew=()=>({});
var fnConstant=()=>empty;
var fnFrozen=()=>frozen;

Tests:

new empty
const arr=new Array(500).fill().map(()=>({}));
var
const arr=new Array(500).fill().map(()=>empty);
var frozen
const arr=new Array(500).fill().map(()=>frozen);
fn new
const arr=new Array(500).fill().map(fnNew);
fn var
const arr=new Array(500).fill().map(fnConstant);
fn frozen
const arr=new Array(500).fill().map(fnFrozen);
const
const mty={}; const arr=new Array(500).fill().map(()=>mty);
new2
const dummy={}; const arr=new Array(500).fill().map(()=>({}));