Run results for: Sparse Array Vs. Object,Map,Set, Number Indexes

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/121.0.6167.138 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 121

Operating system: iOS 17.2

Device Platform: Tablet

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Object

335/s

Array

335/s

Set Length Array

327/s

TypedArray

320/s

map

303/s

set

293/s

View exact numbers

Test name	Executions per second
✓ Object	335 Ops/sec
Array	335 Ops/sec
Set Length Array	327 Ops/sec
TypedArray	320 Ops/sec
map	303 Ops/sec
set	293 Ops/sec

Script Preparation code:

var iterations =100000;
var obj = {};
var arr = [];
var map = new Map();
var set = new Set();
var setLengthArr = new Array(iterations);
var typedArray = new Uint32Array(iterations);

Tests:

Object
for(let i=0;i<iterations;i+=10){ obj[i]=Math.floor(Math.random()*iterations); obj[i+1]=obj[i]+1; }
Array
for(let i=0;i<iterations;i+=10){ arr[i]=Math.floor(Math.random()*iterations); arr[i+1]= arr[i]+1; }
Set Length Array
for(let i=0;i<iterations;i+=10){ setLengthArr[i]=Math.floor(Math.random()*iterations); setLengthArr[i+1] = setLengthArr[i]+1; }
TypedArray
for(let i=0;i<iterations;i+=10){ typedArray[i]=Math.floor(Math.random()*iterations); typedArray[i+1]= typedArray[i]+1; }
map
for(let i=0;i<iterations;i+=10){ map.set(i,Math.floor(Math.random()*iterations)); map.set(i+1,map.get(i)+1) }
set
for(let i=0;i<iterations;i+=10){ set.add(Math.floor(Math.random()*iterations)); set.add(set.has(i+1)) }