Run results for: Object vs Array speed (contiguous)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object Literal	403941.5 Ops/sec
Array Literal	393256.8 Ops/sec

Script Preparation code:

let objLiteral = {
  0x0:()=>{console.log('A');},
  0x1:()=>{console.log('A');},
  0x2:()=>{console.log('A');},
  0x3:()=>{console.log('A');},
  0x4:()=>{console.log('A');},
  0x5:()=>{console.log('A');},
  0x6:()=>{console.log('A');},
  0x7:()=>{console.log('A');},
  0x8:()=>{console.log('A');},
  0x9:()=>{console.log('A');},
  0xA:()=>{console.log('A');},
  0xB:()=>{console.log('A');},
  0xC:()=>{console.log('A');},
  0xD:()=>{console.log('A');},
  0xE:()=>{console.log('A');},
  0xF:()=>{console.log('A');}
}

var arrayLiteral = [
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');},
  ()=>{console.log('A');}
];

Tests:

Object Literal
objLiteral[Math.floor(Math.random() * 0x10)]();
Array Literal
arrayLiteral[Math.floor(Math.random() * 0x10)]();

Run results for: Object vs Array speed (contiguous)

Object Literal

Array Literal