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Run results for:
new empty object vs constant vs frozen constant 2
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<iframe src="https://measurethat.net/Embed?id=538762" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 17
Operating system:
iOS 17.5.1
Device Platform:
Mobile
Date tested:
one year ago
const
180K/s
fn new
143K/s
new empty
142K/s
new2
137K/s
var
51K/s
var frozen
48K/s
fn var
47K/s
fn frozen
45K/s
View exact numbers
Test name
Executions per second
✓
const
179,862 Ops/sec
fn new
143,364 Ops/sec
new empty
141,646 Ops/sec
new2
137,010 Ops/sec
var
51,316 Ops/sec
var frozen
48,216 Ops/sec
fn var
46,941 Ops/sec
fn frozen
45,036 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(()=>({}));