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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=538893" width="100%" height="500px"></iframe>
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
const
491K/s
new empty
460K/s
new2
451K/s
fn new
209K/s
var
51K/s
var frozen
51K/s
fn frozen
47K/s
fn var
46K/s
View exact numbers
Test name
Executions per second
✓
const
491,199 Ops/sec
new empty
459,635 Ops/sec
new2
451,122 Ops/sec
fn new
208,625 Ops/sec
var
51,249 Ops/sec
var frozen
51,045 Ops/sec
fn frozen
46,532 Ops/sec
fn var
46,450 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(()=>({}));