Run results for: Switch vs Prepared Object Literal vs Prepared Array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Switch

149K/s

Array Literal

113K/s

Object Literal

104K/s

View exact numbers

Test name	Executions per second
✓ Switch	148,642 Ops/sec
Array Literal	113,031 Ops/sec
Object Literal	104,494 Ops/sec

Script Preparation code:

var objLiteral = {
  0: function() {
    console.log('A');
  },
  1: function() {
    console.log('B');
  },
  2: function() {
    console.log('C');
  }
}

var arrayLiteral = [
  function() {
    console.log('A');
  },
  function() {
    console.log('B');
  },
  function() {
    console.log('C');
  }
];

function usingSwitch(c) {
  switch (c) {
    case 0: console.log('A'); break;
    case 1: console.log('B'); break;
    case 2: console.log('C'); break;
  }
}

Tests:

Switch
usingSwitch(Math.floor(Math.random() * 3))
Object Literal
objLiteral[Math.floor(Math.random() * 3)]();
Array Literal
arrayLiteral[Math.floor(Math.random() * 3)]();