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

Run details:

User agent: Mozilla/5.0 (Android 12; Mobile; rv:109.0) Gecko/113.0 Firefox/113.0

Browser: Firefox Mobile 113

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Switch	55541.7 Ops/sec
Object Literal	56951.9 Ops/sec
Array Literal	59695.9 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)]();

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

Switch

Object Literal

Array Literal